?? teletextoutputpin.h
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/*
(C) Luke Paton 2004.
Copyright notice:
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#pragma once
// UNITS = 10 ^ 7
// UNITS / 30 = 30 fps;
// UNITS / 20 = 20 fps, etc
const REFERENCE_TIME FPS_30 = UNITS / 30;
const REFERENCE_TIME FPS_20 = UNITS / 20;
const REFERENCE_TIME FPS_10 = UNITS / 10;
const REFERENCE_TIME FPS_5 = UNITS / 5;
const REFERENCE_TIME FPS_4 = UNITS / 4;
const REFERENCE_TIME FPS_3 = UNITS / 3;
const REFERENCE_TIME FPS_2 = UNITS / 2;
const REFERENCE_TIME FPS_1 = UNITS / 1;
class CTeletextOutputPin : public CSourceStream
{
public :
CTeletextOutputPin
(
TCHAR *pObjectName,
CBaseFilter *pFilter,
CCritSec *pLock,
HRESULT *phr,
LPCWSTR pName
);
~CTeletextOutputPin(void);
// Attributes
public :
CCritSec m_cSharedState; // Protects our internal state
BITMAPINFO *m_pBmi; // Pointer to the bitmap header
DWORD m_cbBitmapInfo; // Size of the bitmap header
BYTE * m_pImage; // Points to pixel bits
int m_iFrameNumber;
const REFERENCE_TIME m_rtFrameLength;
long m_nWidth;
long m_nHeight;
HBITMAP m_Bitmap;
HDC m_DC;
HGDIOBJ m_OldObject;
HFONT m_CurrentFont;
HFONT m_SupplementaryFont;
HFONT m_OldFont;
long m_TextMode;
CAMEvent m_EventDataReady;
__int64 m_FirstReferenceTimeMilliseconds;
// Operations
public :
// Override the version that offers exactly one media type
HRESULT DecideBufferSize(IMemAllocator *pAlloc, ALLOCATOR_PROPERTIES *pRequest);
HRESULT FillBuffer(IMediaSample *pSample);
// Set the agreed media type and set up the necessary parameters
HRESULT SetMediaType(const CMediaType *pMediaType);
// Support multiple display formats
HRESULT CheckMediaType(const CMediaType *pMediaType);
HRESULT GetMediaType(int iPosition, CMediaType *pmt);
// Quality control
// Not implemented because we aren't going in real time.
// If the file-writing filter slows the graph down, we just do nothing, which means
// wait until we're unblocked. No frames are ever dropped.
STDMETHODIMP Notify(IBaseFilter* , Quality )
{
return E_FAIL;
}
HRESULT DoBufferProcessingLoop(void);
};
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