deargui-vpl/ref/virtools/Samples/Behaviors/Video/Sources/Video Seek.cpp

/*************************************************************************/
/*	File : VideoSeek.cpp												 */
/*																		 */	
/*	Author :  Leïla AIT KACI											 */	
/*	Last Modification : 28/05/03										 */	
/*************************************************************************/
#include "CKAll.h"
#include "CKVideo.h"
#include "CKVideoManager.h"

CKObjectDeclaration*	FillBehaviorVideoSeekDecl	();
CKERROR					CreateVideoSeekProto		(CKBehaviorPrototype **);
int						VideoSeek					(const CKBehaviorContext& BehContext);
CKERROR					VideoSeekCB					(const CKBehaviorContext& BehContext);

//////////////////////////////////////////////////////////////////////
//								Defines
//////////////////////////////////////////////////////////////////////
#define BB_NAME			"Video Seek"
#define BB_DESC			"Seek in a video."
#define BB_CAT			"Video/Basic"
#define BB_VERSION		0x00010000
#define BB_TARGET		CKCID_VIDEO

#define RETURN_IF_FAILED(res)														\
		if ( res != CK_OK )	{														\
			XString err = video->GetErrorDescrition(res);							\
			beh->SetOutputParameterValue(POUT_ERROR, err.Str(), err.Length() + 1 );	\
			beh->ActivateOutput(OUT_ERROR);											\
			return CKBR_OK;															\
		}


//////////////////////////////////////////////////////////////////////
//						Enums for Parameter's Indexes
//////////////////////////////////////////////////////////////////////
enum BB_IN 
{
	IN_IN
};

enum BB_OUT
{
	OUT_OUT,
	OUT_ERROR
};

enum BB_LOC
{
	SET_HOMOGENEOUS
};

enum BB_PIN
{
	PIN_INTIME
};

enum BB_POUT
{
	POUT_ERROR
};

//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
CKObjectDeclaration	*FillBehaviorVideoSeekDecl()
{
	CKObjectDeclaration *od = CreateCKObjectDeclaration(BB_NAME);	
	od->SetType(CKDLL_BEHAVIORPROTOTYPE);
	od->SetCompatibleClassId(BB_TARGET);
	od->SetDescription(BB_DESC);
	od->SetVersion(BB_VERSION);
	od->SetCategory(BB_CAT);
	od->SetAuthorName("Virtools");
	od->SetAuthorGuid(VIRTOOLS_GUID);
	od->SetGuid(CKGUID(0x10685f49,0xb370229));
	od->SetCreationFunction(CreateVideoSeekProto);

	return od;
}

//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
CKERROR CreateVideoSeekProto(CKBehaviorPrototype** pproto)
{
	CKBehaviorPrototype *proto = CreateCKBehaviorPrototype(BB_NAME);
	if(!proto) 	return CKERR_OUTOFMEMORY;

	//---	Inputs declaration
	proto->DeclareInput("In");

	//---	Outputs declaration
	proto->DeclareOutput("Out");
	proto->DeclareOutput("Error");

	//----- Input Parameters Declaration
	proto->DeclareInParameter("Position", CKPGUID_TIME);

	//---	Output Parameters Declaration
	proto->DeclareOutParameter("Error", CKPGUID_STRING);

	//----	Settings Declaration
	proto->DeclareSetting("Homogeneous", CKPGUID_BOOL, "FALSE");

	proto->SetFlags(CK_BEHAVIORPROTOTYPE_NORMAL);
	proto->SetBehaviorFlags((CK_BEHAVIOR_FLAGS)(CKBEHAVIOR_TARGETABLE));
	proto->SetBehaviorCallbackFct(VideoSeekCB, CKCB_BEHAVIORSETTINGSEDITED|CKCB_BEHAVIORCREATE, NULL);
	proto->SetFunction(VideoSeek);

	*pproto = proto;
	return CK_OK;
}

//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
int VideoSeek(const CKBehaviorContext& BehContext)
{
	CKContext*	ctx = BehContext.Context;
	CKBehavior*	beh = BehContext.Behavior;

	beh->ActivateInput(IN_IN, FALSE);

	CKVideo* video = (CKVideo*) beh->GetTarget();
	if ( !video ) {
		XString err = "Invalid Video";
		beh->SetOutputParameterValue(POUT_ERROR, err.Str(), err.Length() + 1 );
		beh->ActivateOutput(OUT_ERROR);
		return CKBR_OK;
	}

	CK_VIDEO_STATE State = video->GetState();
	switch ( State )
	{
		////////////////////////
		case CK_VIDEO_INVALID:
			RETURN_IF_FAILED( CK_VIDEOERR_NOTLOADED );
			break;
			
		////////////////////////
		case CK_VIDEO_LOADING:
			RETURN_IF_FAILED( CK_VIDEOERR_LOADING );
			break;
			
		////////////////////////
		case CK_VIDEO_UNLOADING:
			RETURN_IF_FAILED( CK_VIDEOERR_UNLOADING );
			break;
			
		////////////////////////
		case CK_VIDEO_STOPPED:
		case CK_VIDEO_PLAYING:
		case CK_VIDEO_PAUSED:
		{
			CKBOOL Homogeneous;
			beh->GetLocalParameterValue(SET_HOMOGENEOUS, &Homogeneous);
	
			float SeekTime = 0;
			beh->GetInputParameterValue(PIN_INTIME, &SeekTime);

			RETURN_IF_FAILED( video->Seek(SeekTime, Homogeneous) );
			beh->SetOutputParameterValue(POUT_ERROR, "Success", 8);
			beh->ActivateOutput(OUT_OUT);
		}
		break;
	}

	return CKBR_OK;
}

//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
CKERROR VideoSeekCB(const CKBehaviorContext& BehContext)
{
	CKContext*	ctx = BehContext.Context;
	CKBehavior*	beh = BehContext.Behavior;

	// Get Settings
	CKBOOL Homogeneous;
	beh->GetLocalParameterValue(SET_HOMOGENEOUS, &Homogeneous);

	// Change Pin Type
	CKParameterIn* pin = beh->GetInputParameter(PIN_INTIME);
	if ( Homogeneous )
		pin->SetGUID(CKPGUID_PERCENTAGE);
	else
		pin->SetGUID(CKPGUID_TIME);

	return CKBR_OK;
}