dlls/strmbase/transform.c

/*
 * Transform Filter (Base for decoders, etc...)
 *
 * Copyright 2005 Christian Costa
 * Copyright 2010 Aric Stewart, CodeWeavers
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */
#include "config.h"
#include <stdarg.h>

#define COBJMACROS

#include "windef.h"
#include "winbase.h"
#include "dshow.h"
#include "amvideo.h"
#include "strmif.h"
#include "vfw.h"

#include <assert.h>

#include "wine/unicode.h"
#include "wine/debug.h"
#include "wine/strmbase.h"

WINE_DEFAULT_DEBUG_CHANNEL(strmbase);

static const WCHAR wcsInputPinName[] = {'i','n','p','u','t',' ','p','i','n',0};
static const WCHAR wcsOutputPinName[] = {'o','u','t','p','u','t',' ','p','i','n',0};

static const IBaseFilterVtbl TransformFilter_Vtbl;
static const IPinVtbl TransformFilter_InputPin_Vtbl;
static const IPinVtbl TransformFilter_OutputPin_Vtbl;

static HRESULT WINAPI TransformFilter_Input_CheckMediaType(IPin *iface, const AM_MEDIA_TYPE * pmt)
{
    BaseInputPin* This = (BaseInputPin*) iface;
    TransformFilter * pTransform;

    TRACE("%p\n", iface);
    pTransform = (TransformFilter*)This->pin.pinInfo.pFilter;

    if (pTransform->pFuncsTable->pfnCheckInputType)
        return pTransform->pFuncsTable->pfnCheckInputType(pTransform, pmt);
    /* Assume OK if there's no query method (the connection will fail if
       needed) */
    return S_OK;
}

static HRESULT WINAPI TransformFilter_Input_Receive(IPin *iface, IMediaSample *pInSample)
{
    HRESULT hr = S_FALSE;
    BaseInputPin* This = (BaseInputPin*) iface;
    TransformFilter * pTransform;
    TRACE("%p\n", iface);
    pTransform = (TransformFilter*)This->pin.pinInfo.pFilter;

    EnterCriticalSection(&pTransform->filter.csFilter);
    if (pTransform->filter.state == State_Stopped)
    {
        LeaveCriticalSection(&pTransform->filter.csFilter);
        return VFW_E_WRONG_STATE;
    }

    if (This->end_of_stream || This->flushing)
    {
        LeaveCriticalSection(&pTransform->filter.csFilter);
        return S_FALSE;
    }
    LeaveCriticalSection(&pTransform->filter.csFilter);

    if (pTransform->pFuncsTable->pfnReceive)
        hr = pTransform->pFuncsTable->pfnReceive(pTransform, pInSample);
    else
        hr = S_FALSE;

    return hr;
}

static HRESULT WINAPI TransformFilter_Output_QueryAccept(IPin *iface, const AM_MEDIA_TYPE * pmt)
{
    BasePin *This = (BasePin *)iface;
    TransformFilter *pTransformFilter = (TransformFilter *)This->pinInfo.pFilter;
    AM_MEDIA_TYPE* outpmt = &pTransformFilter->pmt;
    TRACE("%p\n", iface);

    if (IsEqualIID(&pmt->majortype, &outpmt->majortype)
        && (IsEqualIID(&pmt->subtype, &outpmt->subtype) || IsEqualIID(&outpmt->subtype, &GUID_NULL)))
        return S_OK;
    return S_FALSE;
}

static HRESULT WINAPI TransformFilter_Output_DecideBufferSize(IPin *iface, IMemAllocator *pAlloc, ALLOCATOR_PROPERTIES *ppropInputRequest)
{
    BasePin *This = (BasePin *)iface;
    TransformFilter *pTransformFilter = (TransformFilter *)This->pinInfo.pFilter;
    return pTransformFilter->pFuncsTable->pfnDecideBufferSize(pTransformFilter, pAlloc, ppropInputRequest);
}

static IPin* WINAPI TransformFilter_GetPin(IBaseFilter *iface, int pos)
{
    TransformFilter *This = (TransformFilter *)iface;

    if (pos >= This->npins || pos < 0)
        return NULL;

    IPin_AddRef(This->ppPins[pos]);
    return This->ppPins[pos];
}

static LONG WINAPI TransformFilter_GetPinCount(IBaseFilter *iface)
{
    TransformFilter *This = (TransformFilter *)iface;

    return (This->npins+1);
}

static HRESULT TransformFilter_Init(const IBaseFilterVtbl *pVtbl, const CLSID* pClsid, const TransformFilterFuncTable* pFuncsTable, TransformFilter* pTransformFilter)
{
    HRESULT hr;
    PIN_INFO piInput;
    PIN_INFO piOutput;

    BaseFilter_Init(&pTransformFilter->filter, pVtbl, pClsid, (DWORD_PTR)(__FILE__ ": TransformFilter.csFilter"), TransformFilter_GetPin, TransformFilter_GetPinCount);

    /* pTransformFilter is already allocated */
    pTransformFilter->pFuncsTable = pFuncsTable;
    ZeroMemory(&pTransformFilter->pmt, sizeof(pTransformFilter->pmt));
    pTransformFilter->npins = 2;

    pTransformFilter->ppPins = CoTaskMemAlloc(2 * sizeof(IPin *));

    /* construct input pin */
    piInput.dir = PINDIR_INPUT;
    piInput.pFilter = (IBaseFilter *)pTransformFilter;
    lstrcpynW(piInput.achName, wcsInputPinName, sizeof(piInput.achName) / sizeof(piInput.achName[0]));
    piOutput.dir = PINDIR_OUTPUT;
    piOutput.pFilter = (IBaseFilter *)pTransformFilter;
    lstrcpynW(piOutput.achName, wcsOutputPinName, sizeof(piOutput.achName) / sizeof(piOutput.achName[0]));

    hr = BaseInputPin_Construct(&TransformFilter_InputPin_Vtbl, &piInput, TransformFilter_Input_CheckMediaType, TransformFilter_Input_Receive, &pTransformFilter->filter.csFilter, NULL, &pTransformFilter->ppPins[0]);

    if (SUCCEEDED(hr))
    {
        hr = BaseOutputPin_Construct(&TransformFilter_OutputPin_Vtbl, sizeof(BaseOutputPin), &piOutput, TransformFilter_Output_DecideBufferSize, NULL, &pTransformFilter->filter.csFilter, &pTransformFilter->ppPins[1]);

        if (FAILED(hr))
            ERR("Cannot create output pin (%x)\n", hr);
    }
    if (FAILED(hr))
    {
        CoTaskMemFree(pTransformFilter->ppPins);
        BaseFilterImpl_Release((IBaseFilter*)pTransformFilter);
    }

    return hr;
}

HRESULT TransformFilter_Construct(const IBaseFilterVtbl *pVtbl, LONG filter_size, const CLSID* pClsid, const TransformFilterFuncTable* pFuncsTable, IBaseFilter ** ppTransformFilter)
{
    TransformFilter* pTf;

    *ppTransformFilter = NULL;

    assert(filter_size >= sizeof(TransformFilter));

    pTf = CoTaskMemAlloc(filter_size);
    ZeroMemory(pTf, filter_size);

    if (!pTf)
        return E_OUTOFMEMORY;

    if (SUCCEEDED(TransformFilter_Init(pVtbl, pClsid, pFuncsTable, pTf)))
    {
        *ppTransformFilter = (IBaseFilter*)(&pTf->filter.lpVtbl);
        return S_OK;
    }

    CoTaskMemFree(pTf);
    return E_FAIL;
}

HRESULT WINAPI TransformFilterImpl_QueryInterface(IBaseFilter * iface, REFIID riid, LPVOID * ppv)
{
    HRESULT hr;
    TransformFilter *This = (TransformFilter *)iface;
    TRACE("(%p/%p)->(%s, %p)\n", This, iface, debugstr_guid(riid), ppv);

    hr = BaseFilterImpl_QueryInterface(iface, riid, ppv);

    if (FAILED(hr) && (!IsEqualIID(riid, &IID_IPin) && !IsEqualIID(riid, &IID_IVideoWindow)))
        FIXME("No interface for %s!\n", debugstr_guid(riid));

    return hr;
}

ULONG WINAPI TransformFilterImpl_Release(IBaseFilter * iface)
{
    TransformFilter *This = (TransformFilter *)iface;
    ULONG refCount = BaseFilterImpl_Release(iface);

    TRACE("(%p/%p)->() Release from %d\n", This, iface, refCount + 1);

    if (!refCount)
    {
        ULONG i;

        for (i = 0; i < This->npins; i++)
        {
            IPin *pConnectedTo;

            if (SUCCEEDED(IPin_ConnectedTo(This->ppPins[i], &pConnectedTo)))
            {
                IPin_Disconnect(pConnectedTo);
                IPin_Release(pConnectedTo);
            }
            IPin_Disconnect(This->ppPins[i]);

            IPin_Release(This->ppPins[i]);
        }

        CoTaskMemFree(This->ppPins);

        TRACE("Destroying transform filter\n");
        FreeMediaType(&This->pmt);
        CoTaskMemFree(This);

        return 0;
    }
    else
        return refCount;
}

/** IMediaFilter methods **/

HRESULT WINAPI TransformFilterImpl_Stop(IBaseFilter * iface)
{
    TransformFilter *This = (TransformFilter *)iface;
    HRESULT hr = S_OK;

    TRACE("(%p/%p)\n", This, iface);

    EnterCriticalSection(&This->filter.csFilter);
    {
        This->filter.state = State_Stopped;
        if (This->pFuncsTable->pfnStopStreaming)
            hr = This->pFuncsTable->pfnStopStreaming(This);
    }
    LeaveCriticalSection(&This->filter.csFilter);

    return hr;
}

HRESULT WINAPI TransformFilterImpl_Pause(IBaseFilter * iface)
{
    TransformFilter *This = (TransformFilter *)iface;
    HRESULT hr;

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

    EnterCriticalSection(&This->filter.csFilter);
    {
        if (This->filter.state == State_Stopped)
            hr = IBaseFilter_Run(iface, -1);
        else
            hr = S_OK;

        if (SUCCEEDED(hr))
            This->filter.state = State_Paused;
    }
    LeaveCriticalSection(&This->filter.csFilter);

    return hr;
}

HRESULT WINAPI TransformFilterImpl_Run(IBaseFilter * iface, REFERENCE_TIME tStart)
{
    HRESULT hr = S_OK;
    TransformFilter *This = (TransformFilter *)iface;

    TRACE("(%p/%p)->(%s)\n", This, iface, wine_dbgstr_longlong(tStart));

    EnterCriticalSection(&This->filter.csFilter);
    {
        if (This->filter.state == State_Stopped)
        {
            ((BaseInputPin *)This->ppPins[0])->end_of_stream = 0;
            if (This->pFuncsTable->pfnStartStreaming)
                hr = This->pFuncsTable->pfnStartStreaming(This);
            if (SUCCEEDED(hr))
                hr = BaseOutputPinImpl_Active((BaseOutputPin *)This->ppPins[1]);
        }

        if (SUCCEEDED(hr))
        {
            This->filter.rtStreamStart = tStart;
            This->filter.state = State_Running;
        }
    }
    LeaveCriticalSection(&This->filter.csFilter);

    return hr;
}

/** IBaseFilter implementation **/

HRESULT WINAPI TransformFilterImpl_FindPin(IBaseFilter * iface, LPCWSTR Id, IPin **ppPin)
{
    TransformFilter *This = (TransformFilter *)iface;

    TRACE("(%p/%p)->(%p,%p)\n", This, iface, debugstr_w(Id), ppPin);

    return E_NOTIMPL;
}

static const IBaseFilterVtbl TransformFilter_Vtbl =
{
    TransformFilterImpl_QueryInterface,
    BaseFilterImpl_AddRef,
    TransformFilterImpl_Release,
    BaseFilterImpl_GetClassID,
    TransformFilterImpl_Stop,
    TransformFilterImpl_Pause,
    TransformFilterImpl_Run,
    BaseFilterImpl_GetState,
    BaseFilterImpl_SetSyncSource,
    BaseFilterImpl_GetSyncSource,
    BaseFilterImpl_EnumPins,
    TransformFilterImpl_FindPin,
    BaseFilterImpl_QueryFilterInfo,
    BaseFilterImpl_JoinFilterGraph,
    BaseFilterImpl_QueryVendorInfo
};

static HRESULT WINAPI TransformFilter_InputPin_EndOfStream(IPin * iface)
{
    BaseInputPin* This = (BaseInputPin*) iface;
    TransformFilter* pTransform;
    IPin* ppin;
    HRESULT hr;

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

    /* Since we process samples synchronously, just forward notification downstream */
    pTransform = (TransformFilter*)This->pin.pinInfo.pFilter;
    if (!pTransform)
        hr = E_FAIL;
    else
        hr = IPin_ConnectedTo(pTransform->ppPins[1], &ppin);
    if (SUCCEEDED(hr))
    {
        hr = IPin_EndOfStream(ppin);
        IPin_Release(ppin);
    }

    if (FAILED(hr))
        ERR("%x\n", hr);
    return hr;
}

static HRESULT WINAPI TransformFilter_InputPin_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
{
    BaseInputPin* This = (BaseInputPin*) iface;
    TransformFilter* pTransform;
    HRESULT hr = S_OK;

    TRACE("(%p)->(%p, %p)\n", iface, pReceivePin, pmt);

    pTransform = (TransformFilter*)This->pin.pinInfo.pFilter;

    if (pTransform->pFuncsTable->pfnSetMediaType)
        hr = pTransform->pFuncsTable->pfnSetMediaType(pTransform, PINDIR_INPUT, pmt);

    if (SUCCEEDED(hr) && pTransform->pFuncsTable->pfnCompleteConnect)
        hr = pTransform->pFuncsTable->pfnCompleteConnect(pTransform, PINDIR_INPUT, pReceivePin);

    if (SUCCEEDED(hr))
    {
        hr = BaseInputPinImpl_ReceiveConnection(iface, pReceivePin, pmt);
        if (FAILED(hr) && pTransform->pFuncsTable->pfnBreakConnect)
            pTransform->pFuncsTable->pfnBreakConnect(pTransform, PINDIR_INPUT);
    }

    return hr;
}

static HRESULT WINAPI TransformFilter_InputPin_Disconnect(IPin * iface)
{
    BaseInputPin* This = (BaseInputPin*) iface;
    TransformFilter* pTransform;

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

    pTransform = (TransformFilter*)This->pin.pinInfo.pFilter;
    if (pTransform->pFuncsTable->pfnBreakConnect)
        pTransform->pFuncsTable->pfnBreakConnect(pTransform, PINDIR_INPUT);

    return BasePinImpl_Disconnect(iface);
}

static HRESULT WINAPI TransformFilter_InputPin_BeginFlush(IPin * iface)
{
    BaseInputPin* This = (BaseInputPin*) iface;
    TransformFilter* pTransform;
    HRESULT hr = S_OK;

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

    pTransform = (TransformFilter*)This->pin.pinInfo.pFilter;
    EnterCriticalSection(&pTransform->filter.csFilter);
    if (pTransform->pFuncsTable->pfnBeginFlush)
        hr = pTransform->pFuncsTable->pfnBeginFlush(pTransform);
    if (SUCCEEDED(hr))
        hr = BaseInputPinImpl_BeginFlush(iface);
    LeaveCriticalSection(&pTransform->filter.csFilter);
    return hr;
}

static HRESULT WINAPI TransformFilter_InputPin_EndFlush(IPin * iface)
{
    BaseInputPin* This = (BaseInputPin*) iface;
    TransformFilter* pTransform;
    HRESULT hr = S_OK;

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

    pTransform = (TransformFilter*)This->pin.pinInfo.pFilter;
    EnterCriticalSection(&pTransform->filter.csFilter);
    if (pTransform->pFuncsTable->pfnEndFlush)
        hr = pTransform->pFuncsTable->pfnEndFlush(pTransform);
    if (SUCCEEDED(hr))
        hr = BaseInputPinImpl_EndFlush(iface);
    LeaveCriticalSection(&pTransform->filter.csFilter);
    return hr;
}

static HRESULT WINAPI TransformFilter_InputPin_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate)
{
    BaseInputPin* This = (BaseInputPin*) iface;
    TransformFilter* pTransform;
    HRESULT hr = S_OK;

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

    pTransform = (TransformFilter*)This->pin.pinInfo.pFilter;
    EnterCriticalSection(&pTransform->filter.csFilter);
    if (pTransform->pFuncsTable->pfnNewSegment)
        hr = pTransform->pFuncsTable->pfnNewSegment(pTransform, tStart, tStop, dRate);
    if (SUCCEEDED(hr))
        hr = BaseInputPinImpl_NewSegment(iface, tStart, tStop, dRate);
    LeaveCriticalSection(&pTransform->filter.csFilter);
    return hr;
}

static const IPinVtbl TransformFilter_InputPin_Vtbl =
{
    BaseInputPinImpl_QueryInterface,
    BasePinImpl_AddRef,
    BaseInputPinImpl_Release,
    BaseInputPinImpl_Connect,
    TransformFilter_InputPin_ReceiveConnection,
    TransformFilter_InputPin_Disconnect,
    BasePinImpl_ConnectedTo,
    BasePinImpl_ConnectionMediaType,
    BasePinImpl_QueryPinInfo,
    BasePinImpl_QueryDirection,
    BasePinImpl_QueryId,
    BaseInputPinImpl_QueryAccept,
    BasePinImpl_EnumMediaTypes,
    BasePinImpl_QueryInternalConnections,
    TransformFilter_InputPin_EndOfStream,
    TransformFilter_InputPin_BeginFlush,
    TransformFilter_InputPin_EndFlush,
    TransformFilter_InputPin_NewSegment
};

static HRESULT WINAPI TransformFilter_Output_GetMediaType(IPin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
{
    BasePin *This = (BasePin *)iface;
    TransformFilter *pTransform = (TransformFilter *)This->pinInfo.pFilter;

    if (iPosition < 0)
        return E_INVALIDARG;
    if (iPosition > 0)
        return VFW_S_NO_MORE_ITEMS;
    CopyMediaType(pmt, &pTransform->pmt);
    return S_OK;
}

static HRESULT WINAPI TransformFilter_Output_EnumMediaTypes(IPin * iface, IEnumMediaTypes ** ppEnum)
{
    BasePin *This = (BasePin *)iface;
    TRACE("(%p/%p)->(%p)\n", This, iface, ppEnum);

    return EnumMediaTypes_Construct(iface, TransformFilter_Output_GetMediaType, BasePinImpl_GetMediaTypeVersion, ppEnum);
}

static const IPinVtbl TransformFilter_OutputPin_Vtbl =
{
    BaseOutputPinImpl_QueryInterface,
    BasePinImpl_AddRef,
    BaseOutputPinImpl_Release,
    BaseOutputPinImpl_Connect,
    BaseOutputPinImpl_ReceiveConnection,
    BaseOutputPinImpl_Disconnect,
    BasePinImpl_ConnectedTo,
    BasePinImpl_ConnectionMediaType,
    BasePinImpl_QueryPinInfo,
    BasePinImpl_QueryDirection,
    BasePinImpl_QueryId,
    TransformFilter_Output_QueryAccept,
    TransformFilter_Output_EnumMediaTypes,
    BasePinImpl_QueryInternalConnections,
    BaseOutputPinImpl_EndOfStream,
    BaseOutputPinImpl_BeginFlush,
    BaseOutputPinImpl_EndFlush,
    BaseOutputPinImpl_NewSegment
};