pvrmpeg.c

Lido PXA270平台开发板的最新BSP,包括源代码

/*!****************************************************************************
@File			pvrmpeg.c

@Title			Mpeg Services main module

@Author			Imagination Technologies

@date   		23rd Jan 2004
 
@Copyright     	Copyright 2003-2004 by Imagination Technologies Limited.
                All rights reserved. No part of this software, either
                material or conceptual may be copied or distributed,
                transmitted, transcribed, stored in a retrieval system
                or translated into any human or computer language in any
                form by any means, electronic, mechanical, manual or
                other-wise, or disclosed to third parties without the
                express written permission of Imagination Technologies
                Limited, Unit 8, HomePark Industrial Estate,
                King's Langley, Hertfordshire, WD4 8LZ, U.K.

@Platform		generic

@Description	Main API entry for Mpeg Services

@DoxygenVer		

******************************************************************************/

/******************************************************************************
Modifications :-

$Log: pvrmpeg.c $
*****************************************************************************/

#include "services_headers.h"

#ifdef SUPPORT_DEVCLASS_MPEG

/*----------------------------------------------------------------------------
	Public functions

 PVRSRVCreateMPEGContext


------------------------------------------------------------------------------*/

static IMG_BOOL ReleaseMPEGConnection(IMG_UINT32 ui32ProcessID, IMG_PVOID pvParam, IMG_UINT32 ui32Param);

/*!
******************************************************************************

 @Function	PVRSRVConnectMPEGApplication
 
 @Description 
	Create an MPEG context for an application
	
 @Input psDevInfo

 @Input bConnect
 
 @Return   PVRSRV_ERROR : 

******************************************************************************/
PVRSRV_ERROR PVRSRVConnectMPEGApplication(PVRSRV_DEV_DATA *psDevData, IMG_BOOL bConnect)
{								
	PVRSRV_ERROR		eError		= PVRSRV_OK;
	PVRSRV_DEV_INFO		*psDevInfo	= psDevData->psDevInfoKM;

	/* Valdate device class and type */
	if(psDevInfo->sDevId.eDeviceClass != PVRSRV_DEVICE_CLASS_MPEG)
	{
		return(PVRSRV_ERROR_INVALID_DEVICE);
	}

	if(bConnect)
	{
		/*********************************************** Connect Application */

		ResManRegisterRes((PRESMAN_ITEM)IMG_NULL, RESMAN_TYPE_MPEGCONNECT, 
						   psDevInfo, 0, (RESMAN_FREE_FN)ReleaseMPEGConnection, 
						   RESMAN_AUTOFREE_LEV1);
	}
	else
	{
		/******************************************** Disconnect application */

		eError = ResManFreeResByCriteria(RESMAN_CRITERIA_RESTYPE, 
									     RESMAN_TYPE_MPEGCONNECT, IMG_NULL, 0, 0);

	}

	return(eError);
}


/*----------------------------------------------------------------------------
<function>
    FUNCTION   : FreeDeviceMemCallBack
    PURPOSE    : ResMan call back to free device memory
    PARAMETERS : 
    RETURNS    : TRUE - successful, FALSE - failed
</function>
------------------------------------------------------------------------------*/

static PVRSRV_ERROR ReleaseMPEGConnection(IMG_UINT32 ui32ProcessID, IMG_PVOID pvParam, IMG_UINT32 ui32Param)
{
	PVRSRV_DEV_INFO *psDevInfo = (PVRSRV_DEV_INFO *) pvParam;

	UNREFERENCED_PARAMETER(ui32Param);

	/* Ensure that this process does not have the MPEG device lock */
	HostBreakResource(ui32ProcessID, &psDevInfo->sDeviceSpecific.sMpeg.hDeviceResource);

	return(PVRSRV_OK);
}

#endif /* #ifdef SUPPORT_DEVCLASS_MPEG */

/*--------------------------------- end of file ------------------------------*/