source: trunk/src/quartz/memalloc.c@ 6952

/*
 * Implementation of CLSID_MemoryAllocator.
 *
 * hidenori@a2.ctktv.ne.jp
 */

#include "config.h"

#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winerror.h"
#include "wine/obj_base.h"
#include "strmif.h"
#include "uuids.h"

#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(quartz);

#include "quartz_private.h"
#include "memalloc.h"


/***************************************************************************
 *
 *      new/delete for CLSID_MemoryAllocator.
 *
 */

/* can I use offsetof safely? - FIXME? */
static QUARTZ_IFEntry IFEntries[] =
{
  { &IID_IMemAllocator, offsetof(CMemoryAllocator,memalloc)-offsetof(CMemoryAllocator,unk) },
};

static void QUARTZ_DestroyMemoryAllocator(IUnknown* punk)
{
        CMemoryAllocator_THIS(punk,unk);

        CMemoryAllocator_UninitIMemAllocator( This );
}

HRESULT QUARTZ_CreateMemoryAllocator(IUnknown* punkOuter,void** ppobj)
{
        CMemoryAllocator*       pma;
        HRESULT hr;

        TRACE("(%p,%p)\n",punkOuter,ppobj);

        pma = (CMemoryAllocator*)QUARTZ_AllocObj( sizeof(CMemoryAllocator) );
        if ( pma == NULL )
                return E_OUTOFMEMORY;

        QUARTZ_IUnkInit( &pma->unk, punkOuter );
        hr = CMemoryAllocator_InitIMemAllocator( pma );
        if ( FAILED(hr) )
        {
                QUARTZ_FreeObj( pma );
                return hr;
        }

        pma->unk.pEntries = IFEntries;
        pma->unk.dwEntries = sizeof(IFEntries)/sizeof(IFEntries[0]);
        pma->unk.pOnFinalRelease = QUARTZ_DestroyMemoryAllocator;

        *ppobj = (void*)(&pma->unk);

        return S_OK;
}


/***************************************************************************
 *
 *      CMemoryAllocator::IMemAllocator
 *
 */


static HRESULT WINAPI
IMemAllocator_fnQueryInterface(IMemAllocator* iface,REFIID riid,void** ppobj)
{
        CMemoryAllocator_THIS(iface,memalloc);

        TRACE("(%p)->()\n",This);

        return IUnknown_QueryInterface(This->unk.punkControl,riid,ppobj);
}

static ULONG WINAPI
IMemAllocator_fnAddRef(IMemAllocator* iface)
{
        CMemoryAllocator_THIS(iface,memalloc);

        TRACE("(%p)->()\n",This);

        return IUnknown_AddRef(This->unk.punkControl);
}

static ULONG WINAPI
IMemAllocator_fnRelease(IMemAllocator* iface)
{
        CMemoryAllocator_THIS(iface,memalloc);

        TRACE("(%p)->()\n",This);

        return IUnknown_Release(This->unk.punkControl);
}

static HRESULT WINAPI
IMemAllocator_fnSetProperties(IMemAllocator* iface,ALLOCATOR_PROPERTIES* pPropReq,ALLOCATOR_PROPERTIES* pPropActual)
{
        CMemoryAllocator_THIS(iface,memalloc);
        long    padding;
        HRESULT hr;

        TRACE( "(%p)->(%p,%p)\n", This, pPropReq, pPropActual );

        if ( pPropReq == NULL || pPropActual == NULL )
                return E_POINTER;
        if ( pPropReq->cBuffers < 0 ||
             pPropReq->cbBuffer < 0 ||
             pPropReq->cbAlign < 0 ||
             pPropReq->cbPrefix < 0 )
                return E_INVALIDARG;

        if ( ( pPropReq->cbAlign & (pPropReq->cbAlign-1) ) != 0 )
                return E_INVALIDARG;

        hr = NOERROR;

        EnterCriticalSection( &This->csMem );

        if ( This->pData != NULL || This->ppSamples != NULL )
        {
                /* if commited, properties must not be changed. */
                hr = E_UNEXPECTED;
                goto end;
        }

        This->prop.cBuffers = pPropReq->cBuffers;
        This->prop.cbBuffer = pPropReq->cbBuffer;
        This->prop.cbAlign = pPropReq->cbAlign;
        This->prop.cbPrefix = pPropReq->cbPrefix;

        if ( This->prop.cbAlign == 0 )
                This->prop.cbAlign = 1;
        padding = This->prop.cbAlign -
                ( (This->prop.cbBuffer+This->prop.cbPrefix) % This->prop.cbAlign );

        This->prop.cbBuffer += padding;

        memcpy( pPropActual, &This->prop, sizeof(ALLOCATOR_PROPERTIES) );

end:
        LeaveCriticalSection( &This->csMem );

        return hr;
}

static HRESULT WINAPI
IMemAllocator_fnGetProperties(IMemAllocator* iface,ALLOCATOR_PROPERTIES* pProp)
{
        CMemoryAllocator_THIS(iface,memalloc);

        TRACE( "(%p)->(%p)\n", This, pProp );

        if ( pProp == NULL )
                return E_POINTER;

        EnterCriticalSection( &This->csMem );

        memcpy( pProp, &This->prop, sizeof(ALLOCATOR_PROPERTIES) );

        LeaveCriticalSection( &This->csMem );

        return NOERROR;
}

static HRESULT WINAPI
IMemAllocator_fnCommit(IMemAllocator* iface)
{
        CMemoryAllocator_THIS(iface,memalloc);
        HRESULT hr;
        LONG    lBufSize;
        LONG    i;
        BYTE*   pCur;

        TRACE( "(%p)->()\n", This );

        EnterCriticalSection( &This->csMem );

        hr = NOERROR;
        if ( This->pData != NULL || This->ppSamples != NULL ||
             This->prop.cBuffers <= 0 )
                goto end;

        lBufSize = This->prop.cBuffers *
                (This->prop.cbBuffer + This->prop.cbPrefix) +
                This->prop.cbAlign;
        if ( lBufSize <= 0 )
                lBufSize = 1;

        This->pData = (BYTE*)QUARTZ_AllocMem( lBufSize );
        if ( This->pData == NULL )
        {
                hr = E_OUTOFMEMORY;
                goto end;
        }

        This->ppSamples = (CMemMediaSample**)QUARTZ_AllocMem(
                sizeof(CMemMediaSample*) * This->prop.cBuffers );
        if ( This->ppSamples == NULL )
        {
                hr = E_OUTOFMEMORY;
                goto end;
        }

        for ( i = 0; i < This->prop.cBuffers; i++ )
                This->ppSamples[i] = NULL;

        pCur = This->pData + This->prop.cbAlign - ((This->pData-(BYTE*)NULL) & (This->prop.cbAlign-1));

        for ( i = 0; i < This->prop.cBuffers; i++ )
        {
                hr = QUARTZ_CreateMemMediaSample(
                        pCur, (This->prop.cbBuffer + This->prop.cbPrefix),
                        iface, &This->ppSamples[i] );
                if ( FAILED(hr) )
                        goto end;
                pCur += (This->prop.cbBuffer + This->prop.cbPrefix);
        }

        hr = NOERROR;
end:
        if ( FAILED(hr) )
                IMemAllocator_Decommit(iface);

        LeaveCriticalSection( &This->csMem );

        return hr;
}

static HRESULT WINAPI
IMemAllocator_fnDecommit(IMemAllocator* iface)
{
        CMemoryAllocator_THIS(iface,memalloc);
        HRESULT hr;
        LONG    i;
        BOOL    bBlock;

        TRACE( "(%p)->()\n", This );

        EnterCriticalSection( &This->csMem );

        hr = NOERROR;

        if ( This->pData == NULL && This->ppSamples == NULL )
                goto end;

        while ( 1 )
        {
                bBlock = FALSE;
                i = 0;

                ResetEvent( This->hEventSample );

                while ( 1 )
                {
                        if ( i >= This->prop.cBuffers )
                                break;

                        if ( This->ppSamples[i] != NULL )
                        {
                                if ( This->ppSamples[i]->ref == 0 )
                                {
                                        QUARTZ_DestroyMemMediaSample( This->ppSamples[i] );
                                        This->ppSamples[i] = NULL;
                                }
                                else
                                {
                                        bBlock = TRUE;
                                }
                        }
                        i++;
                }

                if ( !bBlock )
                {
                        QUARTZ_FreeMem(This->ppSamples);
                        This->ppSamples = NULL;
                        QUARTZ_FreeMem(This->pData);
                        This->pData = NULL;
                        hr = NOERROR;
                        break;
                }

                WaitForSingleObject( This->hEventSample, INFINITE );
        }

end:
        LeaveCriticalSection( &This->csMem );

        return hr;
}

static HRESULT WINAPI
IMemAllocator_fnGetBuffer(IMemAllocator* iface,IMediaSample** ppSample,REFERENCE_TIME* prtStart,REFERENCE_TIME* prtEnd,DWORD dwFlags)
{
        CMemoryAllocator_THIS(iface,memalloc);
        LONG    i;
        HRESULT hr;

        TRACE( "(%p)->(%p,%p,%p,%lu)\n", This, ppSample, prtStart, prtEnd, dwFlags );

        if ( ppSample == NULL )
                return E_POINTER;

        EnterCriticalSection( &This->csMem );

        hr = NOERROR;

        if ( This->pData == NULL || This->ppSamples == NULL ||
             This->prop.cBuffers <= 0 )
        {
                hr = E_FAIL; /* FIXME? */
                goto end;
        }

        while ( 1 )
        {
                ResetEvent( This->hEventSample );

                for ( i = 0; i < This->prop.cBuffers; i++ )
                {
                        if ( This->ppSamples[i]->ref == 0 )
                        {
                                *ppSample = (IMediaSample*)(This->ppSamples[i]);
                                IMediaSample_AddRef( *ppSample );
                                hr = NOERROR;
                                goto end;
                        }
                }

                if ( dwFlags & AM_GBF_NOWAIT )
                {
                        hr = E_FAIL; /* FIXME? */
                        goto end;
                }

                WaitForSingleObject( This->hEventSample, INFINITE );
        }

end:
        LeaveCriticalSection( &This->csMem );

        return hr;
}

static HRESULT WINAPI
IMemAllocator_fnReleaseBuffer(IMemAllocator* iface,IMediaSample* pSample)
{
        CMemoryAllocator_THIS(iface,memalloc);

        TRACE( "(%p)->(%p)\n", This, pSample );
        SetEvent( This->hEventSample );

        return NOERROR;
}



static ICOM_VTABLE(IMemAllocator) imemalloc =
{
        ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
        /* IUnknown fields */
        IMemAllocator_fnQueryInterface,
        IMemAllocator_fnAddRef,
        IMemAllocator_fnRelease,
        /* IMemAllocator fields */
        IMemAllocator_fnSetProperties,
        IMemAllocator_fnGetProperties,
        IMemAllocator_fnCommit,
        IMemAllocator_fnDecommit,
        IMemAllocator_fnGetBuffer,
        IMemAllocator_fnReleaseBuffer,
};


HRESULT CMemoryAllocator_InitIMemAllocator( CMemoryAllocator* pma )
{
        TRACE("(%p)\n",pma);

        ICOM_VTBL(&pma->memalloc) = &imemalloc;

        ZeroMemory( &pma->prop, sizeof(pma->prop) );
        pma->hEventSample = (HANDLE)NULL;
        pma->pData = NULL;
        pma->ppSamples = NULL;

        pma->hEventSample = CreateEventA( NULL, TRUE, FALSE, NULL );
        if ( pma->hEventSample == (HANDLE)NULL )
                return E_OUTOFMEMORY;

        InitializeCriticalSection( &pma->csMem );

        return NOERROR;
}

void CMemoryAllocator_UninitIMemAllocator( CMemoryAllocator* pma )
{
        TRACE("(%p)\n",pma);

        IMemAllocator_Decommit( (IMemAllocator*)(&pma->memalloc) );

        DeleteCriticalSection( &pma->csMem );

        if ( pma->hEventSample != (HANDLE)NULL )
                CloseHandle( pma->hEventSample );
}