video.h
[La característica asociada a esta página, DirectShow, es una característica heredada. Se ha reemplazado por MediaPlayer, IMFMediaEngine y Captura de audio/vídeo en Media Foundation. Esas características se han optimizado para Windows 10 y Windows 11. Microsoft recomienda encarecidamente que el nuevo código use MediaPlayer, IMFMediaEngine y Audio/Video Capture en Media Foundation en lugar de DirectShow, siempre que sea posible. Microsoft sugiere que el código existente que usa las API heredadas se reescriba para usar las nuevas API si es posible.
Este tema contiene código para el tutorial Reproducción de audio y vídeo en DirectShow.
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
#pragma once
#include <windows.h>
#include <dshow.h>
#include <d3d9.h>
#include <Vmr9.h>
#include <Evr.h>
template <class T> void SafeRelease(T **ppT)
{
if (*ppT)
{
(*ppT)->Release();
*ppT = NULL;
}
}
HRESULT RemoveUnconnectedRenderer(IGraphBuilder *pGraph, IBaseFilter *pRenderer, BOOL *pbRemoved);
HRESULT AddFilterByCLSID(IGraphBuilder *pGraph, REFGUID clsid, IBaseFilter **ppF, LPCWSTR wszName);
// Abstract class to manage the video renderer filter.
// Specific implementations handle the VMR-7, VMR-9, or EVR filter.
class CVideoRenderer
{
public:
virtual ~CVideoRenderer() {};
virtual BOOL HasVideo() const = 0;
virtual HRESULT AddToGraph(IGraphBuilder *pGraph, HWND hwnd) = 0;
virtual HRESULT FinalizeGraph(IGraphBuilder *pGraph) = 0;
virtual HRESULT UpdateVideoWindow(HWND hwnd, const LPRECT prc) = 0;
virtual HRESULT Repaint(HWND hwnd, HDC hdc) = 0;
virtual HRESULT DisplayModeChanged() = 0;
};
// Manages the VMR-7 video renderer filter.
class CVMR7 : public CVideoRenderer
{
IVMRWindowlessControl *m_pWindowless;
public:
CVMR7();
~CVMR7();
BOOL HasVideo() const;
HRESULT AddToGraph(IGraphBuilder *pGraph, HWND hwnd);
HRESULT FinalizeGraph(IGraphBuilder *pGraph);
HRESULT UpdateVideoWindow(HWND hwnd, const LPRECT prc);
HRESULT Repaint(HWND hwnd, HDC hdc);
HRESULT DisplayModeChanged();
};
// Manages the VMR-9 video renderer filter.
class CVMR9 : public CVideoRenderer
{
IVMRWindowlessControl9 *m_pWindowless;
public:
CVMR9();
~CVMR9();
BOOL HasVideo() const;
HRESULT AddToGraph(IGraphBuilder *pGraph, HWND hwnd);
HRESULT FinalizeGraph(IGraphBuilder *pGraph);
HRESULT UpdateVideoWindow(HWND hwnd, const LPRECT prc);
HRESULT Repaint(HWND hwnd, HDC hdc);
HRESULT DisplayModeChanged();
};
// Manages the EVR video renderer filter.
class CEVR : public CVideoRenderer
{
IBaseFilter *m_pEVR;
IMFVideoDisplayControl *m_pVideoDisplay;
public:
CEVR();
~CEVR();
BOOL HasVideo() const;
HRESULT AddToGraph(IGraphBuilder *pGraph, HWND hwnd);
HRESULT FinalizeGraph(IGraphBuilder *pGraph);
HRESULT UpdateVideoWindow(HWND hwnd, const LPRECT prc);
HRESULT Repaint(HWND hwnd, HDC hdc);
HRESULT DisplayModeChanged();
};
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