// Copyright (c) 1998  Microsoft Corporation.  All Rights Reserved.
import "unknwn.idl";

// data id flags, used to notify the client whenever pertinent data changes
#define MIXER_DATA_ASPECT_RATIO             0x00000001 // picture aspect ratio changed
#define MIXER_DATA_NATIVE_SIZE              0x00000002 // native size of video changed
#define MIXER_DATA_PALETTE                  0x00000004 // palette of video changed

// status flags defined here
#define MIXER_STATE_MASK                    0x00000003 // use this mask with state status bits
#define MIXER_STATE_UNCONNECTED             0x00000000 // mixer is unconnected and stopped
#define MIXER_STATE_CONNECTED_STOPPED       0x00000001 // mixer is connected and stopped
#define MIXER_STATE_CONNECTED_PAUSED        0x00000002 // mixer is connected and paused
#define MIXER_STATE_CONNECTED_PLAYING       0x00000003 // mixer is connected and playing

interface IMixerOCXNotify;
interface IMixerOCX;

[
    object,
    uuid(81A3BD31-DEE1-11d1-8508-00A0C91F9CA0),
    helpstring("IMixerOCXNotify Interface"),
    pointer_default(unique)
]
interface IMixerOCXNotify : IUnknown
{
    // invalidates the rect
    HRESULT OnInvalidateRect([in] LPCRECT lpcRect);

    // informs that a status change has occured, new status bits provided in ulStatusFlags
    HRESULT OnStatusChange([in] ULONG ulStatusFlags);

    // informs that data parameters, whose id is present in ilDataFlags has changed
    HRESULT OnDataChange([in] ULONG ulDataFlags);
};

[
    object,
    uuid(81A3BD32-DEE1-11d1-8508-00A0C91F9CA0),
    helpstring("IMixerOCX Interface"),
    pointer_default(unique)
]
interface IMixerOCX : IUnknown
{
    // used to notify the mixer that the display mode has changed, the mixer handles this
    // asynchronously and the calls OnStatusChange(MIXER_DISPLAYCHANGE_HANDLED) when processing
    // is done
    HRESULT OnDisplayChange([in] ULONG ulBitsPerPixel, [in] ULONG ulScreenWidth, [in] ULONG ulScreenHeight);

    HRESULT GetAspectRatio([out] LPDWORD pdwPictAspectRatioX, [out] LPDWORD pdwPictAspectRatioY);

	HRESULT GetVideoSize([out] LPDWORD pdwVideoWidth, [out] LPDWORD pdwVideoHeight);

    HRESULT GetStatus([out] LPDWORD *pdwStatus);

    // the dc provided here is not supposed to be cached. If apps have set a dc using
    // SetDrawInfo, then it is illegal to provide a non NULL argument here
    HRESULT OnDraw([in] HDC hdcDraw, [in] LPCRECT prcDraw);

    // lpptTopLeftSC should be NULL unless MIXER_DRAW_DC_ONSCREEN is set to TRUE
    // specifying a NULL value for lprcClip means no clipping
    // lpptTopLeftSC - top left corner of surface/dc in screen coordinates
    // prcDrawCC - draw rectangle in surface/dc coordinates
    // lprcClip - clipping rect in surface/dc coordinates (optional)
    HRESULT SetDrawRegion([in] LPPOINT lpptTopLeftSC, [in] LPCRECT prcDrawCC, [in] LPCRECT lprcClip);

    // function to set the sink interface for client notification
    HRESULT Advise([in] IMixerOCXNotify *pmdns);

    // function to remove the sink interface
    HRESULT UnAdvise();
};

