3. Set up an engineering attribute
Project → PlayWnd Properties → Configuration Properties → Links → Enter → Additional Dependencies, Add Library Strmiids.lib and Quartz.lib.
Since the dshow.h header file is used in any DirectShow project, we stdafx.h add to the following:
#include
4. Design dialog, as follows:
IDC_STATIC
Control type
Static text
CAPTION
Media file name:
IDC_MEDIAFILE_EDIT
Control type
Edit Control
IDC_BROWSE_BUTTON
Control type
Button
CAPTION
Browse
IDC_VW_FRAME
Control type
Picture Control
Type
Rectangle
IDC_PLAY_BUTTON
Control type
Button
CAPTION
Play
IDC_PAUSE_BUTTON
Control type
Button
CAPTION
time out
IDCANCEL
Control type
Button
CAPTION
shut down
5.com's initialization and uninstallation,
Modify PlayWnd.cpp Add initialization code (the joined code is expressed in black body, the same below)
Bool cpplayWndapp :: InitInstance ()
{
// If a list of applications running on Windows XP specifies
// Use ComctL32.dll version 6 or higher to enable visual mode,
// requires INITCOMMONCONTROLS (). Otherwise, the window will not be created.
INITCOMMONCONTROLS ();
// Initialize COM interface
HRESULT HR = Coinitialize (NULL);
IF (Failed (HR))
{
"Error - Could Not Initialize COM Library./N");
Return False;
}
CWINAPP :: InitInstance ();
AFXENABLECONTROLCONTAINER ();
Modify PlayWnd.cpp Add Uninstall COM code, pay attention to overloading the virtual function EXITINSTANCE
INT CPLAYFILEAPP :: EXIXSTANCE ()
{
// TODO: Add a dedicated code and / or call the base class here
// Turn off COM
Couninitialize ();
Return CWINAPP :: EXITINSTANCE ();
}
6. Define media control member variables
Modify PlayWnddlg.h as follows:
protected:
Hicon M_Hicon;
// Generated message mapping function
Virtual Bool OnInitdialog ();
AFX_MSG Void OnSysCommand (Uint Nid, LParam Lparam);
AFX_MSG void onpaint ();
AFX_MSG HCURSOR ONQUERYDRAGICON ();
Declare_message_map ()
/ / And media control related member variables
Private:
Igraphbuilder * m_pgraph; // g graphbuilder interface provides methods for generating filter graph phase // off
IMediaControl * m_pmediacontrol; // iMediaControl interface provides a way to control flow through filter // GRAPH data streams
IMediaeventex * m_pevent; // iMediaEventEx inherits from iMediaEvent, providing methods for obtaining event messages from // filter graph manager
IMediaseeking * m_pmediaseeking; // iMediaseeping provides a control flow playing location and play // speed method cstring m_StrMediafile; / / The name of the media file currently played
BOOL M_ISPLAYING; / / Current playback status
}
