private static extern int AVIFileCreateStream( int ptr_pfile, out IntPtr ptr_ptr_avi, ref AVISTREAMINFOW ptr_streaminfo );
public static extern int AVIStreamInfo(
int pAVIStream,
ref AVISTREAMINFOW psi,
int lSize );
private void CreateStream() {
// video stream
AVISTREAMINFOW strhdr = new AVISTREAMINFOW();
strhdr.fccType = _STREAM_TYPE_VIDEO;
strhdr.fccHandler = 0;// fccHandler_;
strhdr.dwFlags = 0;
strhdr.dwCaps = 0;
strhdr.wPriority = 0;
strhdr.wLanguage = 0;
strhdr.dwScale = m_scale;
strhdr.dwRate = m_rate;
strhdr.dwStart = 0;
strhdr.dwLength = 0;
strhdr.dwInitialFrames = 0;
strhdr.dwSuggestedBufferSize = m_height * m_stride;
strhdr.dwQuality = 0xffffffff;
strhdr.dwSampleSize = 0;
strhdr.rect_top = 0;
strhdr.rect_left = 0;
strhdr.rect_bottom = m_height;
strhdr.rect_right = m_width;
strhdr.dwEditCount = 0;
strhdr.dwFormatChangeCount = 0;
strhdr.szName0 = 0;
strhdr.szName1 = 0;
int hr = AVIFileCreateStream( m_file_handle, out m_video, ref strhdr );
if ( hr != 0 ) {
throw new AviException( "AVIFileCreateStream; Video" );
}
#if DEBUG
Console.WriteLine( "AviWrierVfw+CreateStream" );
Console.WriteLine( " strhdr.fccHandler=" + strhdr.fccHandler );
#endif
}
/// <summary>
/// Opens an AVI file and creates a GetFrame object
/// </summary>
/// <param name="fileName">Name of the AVI file</param>
public void Open( string fileName ) {
//Intitialize AVI library
VFW.AVIFileInit();
//Open the file
int result = VFW.AVIFileOpenW(
ref aviFile, fileName,
(int)win32.OF_SHARE_DENY_WRITE, 0 );
if ( result != 0 ) {
throw new Exception( "Exception in AVIFileOpen: " + result.ToString() );
}
//Get the video stream
result = VFW.AVIFileGetStream(
aviFile,
out aviStream,
(int)VFW.streamtypeVIDEO, 0 );
if ( result != 0 ) {
throw new Exception( "Exception in AVIFileGetStream: " + result.ToString() );
}
firstFrame = VFW.AVIStreamStart( aviStream.ToInt32() );
countFrames = VFW.AVIStreamLength( aviStream.ToInt32() );
streamInfo = new AVISTREAMINFOW();
result = VFW.AVIStreamInfo( aviStream.ToInt32(), ref streamInfo, Marshal.SizeOf( streamInfo ) );
if ( result != 0 ) {
throw new Exception( "Exception in AVIStreamInfo: " + result.ToString() );
}
//Open frames
BITMAPINFOHEADER bih = new BITMAPINFOHEADER();
bih.biBitCount = 24;
bih.biClrImportant = 0;
bih.biClrUsed = 0;
bih.biCompression = 0; //BI_RGB;
bih.biHeight = (Int32)streamInfo.rect_bottom;
bih.biWidth = (Int32)streamInfo.rect_right;
bih.biPlanes = 1;
bih.biSize = (UInt32)Marshal.SizeOf( bih );
bih.biXPelsPerMeter = 0;
bih.biYPelsPerMeter = 0;
getFrameObject = VFW.AVIStreamGetFrameOpen( aviStream, ref bih ); //force function to return 24bit DIBS
//getFrameObject = Avi.AVIStreamGetFrameOpen(aviStream, 0); //return any bitmaps
if ( getFrameObject == 0 ) {
throw new Exception( "Exception in AVIStreamGetFrameOpen!" );
}
m_opened = true;
m_fileName = fileName;
}
