DirectShow: refactor custom renderer filter

Refactor out some of the filter and pin logic into the
DirectShowBaseFilter and DirectShowPin abstract classes.
This will avoid code duplication when implementing the probe
filter. The existing source filter (for qrc files) can also be
refactored to use these abstract classes.

Change-Id: Iaf141472dea82579ad085b3318624f9a57aa46d8
Reviewed-by: Christian Stromme <christian.stromme@qt.io>

1 files changed, 184 insertions, 0 deletions

diff --git a/src/plugins/directshow/helpers/directshowpin.h b/src/plugins/directshow/helpers/directshowpin.h
new file mode 100644
index 000000000..823223956
--- /dev/null
+++ b/src/plugins/directshow/helpers/directshowpin.h
@@ -0,0 +1,184 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef DIRECTSHOWPIN_H
+#define DIRECTSHOWPIN_H
+
+#include "directshowobject.h"
+
+#include "directshowmediatype.h"
+#include <qstring.h>
+#include <qmutex.h>
+
+QT_USE_NAMESPACE
+
+class DirectShowBaseFilter;
+
+class DirectShowPin : public DirectShowObject
+                    , public IPin
+{
+    DIRECTSHOW_OBJECT
+
+public:
+    virtual ~DirectShowPin();
+
+    QString name() const { return m_name; }
+    bool isConnected() const { return m_peerPin != NULL; }
+
+    virtual bool isMediaTypeSupported(const DirectShowMediaType *type) = 0;
+    virtual QList<DirectShowMediaType> supportedMediaTypes();
+    virtual bool setMediaType(const DirectShowMediaType *type);
+
+    virtual HRESULT completeConnection(IPin *pin);
+    virtual HRESULT connectionEnded();
+
+    virtual HRESULT setActive(bool active);
+
+    // DirectShowObject
+    HRESULT getInterface(REFIID riid, void **ppvObject);
+
+    // IPin
+    STDMETHODIMP Connect(IPin *pReceivePin, const AM_MEDIA_TYPE *pmt);
+    STDMETHODIMP ReceiveConnection(IPin *pConnector, const AM_MEDIA_TYPE *pmt);
+    STDMETHODIMP Disconnect();
+    STDMETHODIMP ConnectedTo(IPin **ppPin);
+
+    STDMETHODIMP ConnectionMediaType(AM_MEDIA_TYPE *pmt);
+
+    STDMETHODIMP QueryPinInfo(PIN_INFO *pInfo);
+    STDMETHODIMP QueryId(LPWSTR *Id);
+
+    STDMETHODIMP QueryAccept(const AM_MEDIA_TYPE *pmt);
+
+    STDMETHODIMP EnumMediaTypes(IEnumMediaTypes **ppEnum);
+
+    STDMETHODIMP QueryInternalConnections(IPin **apPin, ULONG *nPin);
+
+    STDMETHODIMP EndOfStream();
+
+    STDMETHODIMP BeginFlush();
+    STDMETHODIMP EndFlush();
+
+    STDMETHODIMP NewSegment(REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate);
+
+    STDMETHODIMP QueryDirection(PIN_DIRECTION *pPinDir);
+
+protected:
+    DirectShowPin(DirectShowBaseFilter *filter, const QString &name, PIN_DIRECTION direction);
+
+    QMutex m_mutex;
+
+    DirectShowBaseFilter *m_filter;
+    QString m_name;
+    PIN_DIRECTION m_direction;
+
+    IPin *m_peerPin;
+    DirectShowMediaType m_mediaType;
+
+private:
+    Q_DISABLE_COPY(DirectShowPin)
+    HRESULT tryMediaTypes(IPin *pin, const DirectShowMediaType *type, IEnumMediaTypes *enumMediaTypes);
+    HRESULT tryConnect(IPin *pin, const DirectShowMediaType *type);
+};
+
+
+class DirectShowOutputPin : public DirectShowPin
+{
+    DIRECTSHOW_OBJECT
+
+public:
+    virtual ~DirectShowOutputPin();
+
+    // DirectShowPin
+    virtual HRESULT completeConnection(IPin *pin);
+    virtual HRESULT connectionEnded();
+    virtual HRESULT setActive(bool active);
+
+    // IPin
+    STDMETHODIMP EndOfStream();
+
+protected:
+    DirectShowOutputPin(DirectShowBaseFilter *filter, const QString &name);
+
+    IMemAllocator *m_allocator;
+    IMemInputPin *m_inputPin;
+
+private:
+    Q_DISABLE_COPY(DirectShowOutputPin)
+};
+
+
+class DirectShowInputPin : public DirectShowPin
+                         , public IMemInputPin
+{
+    DIRECTSHOW_OBJECT
+
+public:
+    virtual ~DirectShowInputPin();
+
+    const AM_SAMPLE2_PROPERTIES *currentSampleProperties() const { return &m_sampleProperties; }
+
+    // DirectShowObject
+    HRESULT getInterface(REFIID riid, void **ppvObject);
+
+    // DirectShowPin
+    HRESULT connectionEnded();
+    HRESULT setActive(bool active);
+
+    // IPin
+    STDMETHODIMP EndOfStream();
+    STDMETHODIMP BeginFlush();
+    STDMETHODIMP EndFlush();
+
+    // IMemInputPin
+    STDMETHODIMP GetAllocator(IMemAllocator **ppAllocator);
+    STDMETHODIMP NotifyAllocator(IMemAllocator *pAllocator, BOOL bReadOnly);
+    STDMETHODIMP GetAllocatorRequirements(ALLOCATOR_PROPERTIES *pProps);
+
+    STDMETHODIMP Receive(IMediaSample *pSample);
+    STDMETHODIMP ReceiveMultiple(IMediaSample **pSamples, long nSamples, long *nSamplesProcessed);
+    STDMETHODIMP ReceiveCanBlock();
+
+protected:
+    DirectShowInputPin(DirectShowBaseFilter *filter, const QString &name);
+
+    IMemAllocator *m_allocator;
+    bool m_flushing;
+    bool m_inErrorState;
+    AM_SAMPLE2_PROPERTIES m_sampleProperties;
+
+private:
+    Q_DISABLE_COPY(DirectShowInputPin)
+};
+
+#endif // DIRECTSHOWPIN_H