/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
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** 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
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** use the contact form at http://qt.digia.com/contact-us.
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** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
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** 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
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** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
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****************************************************************************/

#ifndef SOURCERESOLVER_H
#define SOURCERESOLVER_H

#include "mfstream.h"
#include "qmediaresource.h"

class SourceResolver: public QObject, public IMFAsyncCallback
{
    Q_OBJECT
public:
    SourceResolver();

    ~SourceResolver();

    STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppvObject);
    STDMETHODIMP_(ULONG) AddRef(void);
    STDMETHODIMP_(ULONG) Release(void);

    HRESULT STDMETHODCALLTYPE Invoke(IMFAsyncResult *pAsyncResult);

    HRESULT STDMETHODCALLTYPE GetParameters(DWORD*, DWORD*);

    void load(QMediaResourceList& resources, QIODevice* stream);

    void cancel();

    void shutdown();

    IMFMediaSource* mediaSource() const;

Q_SIGNALS:
    void error(long hr);
    void mediaSourceReady();

private:
    class State : public IUnknown
    {
    public:
        State(IMFSourceResolver *sourceResolver, bool fromStream);
        ~State();

        STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppvObject);

        STDMETHODIMP_(ULONG) AddRef(void);

        STDMETHODIMP_(ULONG) Release(void);

        IMFSourceResolver* sourceResolver() const;
        bool fromStream() const;

    private:
        long m_cRef;
        IMFSourceResolver *m_sourceResolver;
        bool m_fromStream;
    };

    long              m_cRef;
    IUnknown          *m_cancelCookie;
    IMFSourceResolver *m_sourceResolver;
    IMFMediaSource    *m_mediaSource;
    MFStream          *m_stream;
    QMutex            m_mutex;
};

#endif