strmbase: Move mediaSeeking to strmbase SourceSeeking.
diff --git a/dlls/quartz/avisplit.c b/dlls/quartz/avisplit.c
index ffc0f27..fadca7d 100644
--- a/dlls/quartz/avisplit.c
+++ b/dlls/quartz/avisplit.c
@@ -101,6 +101,11 @@
     DWORD stream;
 };
 
+static inline AVISplitterImpl *impl_from_IMediaSeeking( IMediaSeeking *iface )
+{
+    return (AVISplitterImpl *)((char*)iface - FIELD_OFFSET(AVISplitterImpl, Parser.sourceSeeking.lpVtbl));
+}
+
 /* The threading stuff cries for an explanation
  *
  * PullPin starts processing and calls AVISplitter_first_request
@@ -970,16 +975,16 @@
 
         frames *= stream->streamheader.dwScale;
         /* Keep accuracy as high as possible for duration */
-        This->Parser.mediaSeeking.llDuration = frames * 10000000;
-        This->Parser.mediaSeeking.llDuration /= stream->streamheader.dwRate;
-        This->Parser.mediaSeeking.llStop = This->Parser.mediaSeeking.llDuration;
-        This->Parser.mediaSeeking.llCurrent = 0;
+        This->Parser.sourceSeeking.llDuration = frames * 10000000;
+        This->Parser.sourceSeeking.llDuration /= stream->streamheader.dwRate;
+        This->Parser.sourceSeeking.llStop = This->Parser.sourceSeeking.llDuration;
+        This->Parser.sourceSeeking.llCurrent = 0;
 
         frames /= stream->streamheader.dwRate;
 
         TRACE("Duration: %d days, %d hours, %d minutes and %d.%03u seconds\n", (DWORD)(frames / 86400),
         (DWORD)((frames % 86400) / 3600), (DWORD)((frames % 3600) / 60), (DWORD)(frames % 60),
-        (DWORD)(This->Parser.mediaSeeking.llDuration/10000) % 1000);
+        (DWORD)(This->Parser.sourceSeeking.llDuration/10000) % 1000);
     }
 
     return S_OK;
@@ -1252,15 +1257,15 @@
     return ref;
 }
 
-static HRESULT AVISplitter_seek(IBaseFilter *iface)
+static HRESULT WINAPI AVISplitter_seek(IMediaSeeking *iface)
 {
-    AVISplitterImpl *This = (AVISplitterImpl *)iface;
+    AVISplitterImpl *This = impl_from_IMediaSeeking(iface);
     PullPin *pPin = This->Parser.pInputPin;
     LONGLONG newpos, endpos;
     DWORD x;
 
-    newpos = This->Parser.mediaSeeking.llCurrent;
-    endpos = This->Parser.mediaSeeking.llDuration;
+    newpos = This->Parser.sourceSeeking.llCurrent;
+    endpos = This->Parser.sourceSeeking.llDuration;
 
     if (newpos > endpos)
     {
diff --git a/dlls/quartz/control.c b/dlls/quartz/control.c
index b1485a4..9ff4c83 100644
--- a/dlls/quartz/control.c
+++ b/dlls/quartz/control.c
@@ -224,288 +224,6 @@
     return S_OK;
 }
 
-HRESULT MediaSeekingImpl_Init(IBaseFilter *pUserData, CHANGEPROC fnChangeStop, CHANGEPROC fnChangeCurrent, CHANGEPROC fnChangeRate, MediaSeekingImpl * pSeeking, PCRITICAL_SECTION crit_sect)
-{
-    assert(fnChangeStop && fnChangeCurrent && fnChangeRate);
-
-    pSeeking->refCount = 1;
-    pSeeking->pUserData = pUserData;
-    pSeeking->fnChangeRate = fnChangeRate;
-    pSeeking->fnChangeStop = fnChangeStop;
-    pSeeking->fnChangeCurrent = fnChangeCurrent;
-    pSeeking->dwCapabilities = AM_SEEKING_CanSeekForwards |
-        AM_SEEKING_CanSeekBackwards |
-        AM_SEEKING_CanSeekAbsolute |
-        AM_SEEKING_CanGetStopPos |
-        AM_SEEKING_CanGetDuration;
-    pSeeking->llCurrent = 0;
-    pSeeking->llStop = ((ULONGLONG)0x80000000) << 32;
-    pSeeking->llDuration = pSeeking->llStop;
-    pSeeking->dRate = 1.0;
-    pSeeking->timeformat = TIME_FORMAT_MEDIA_TIME;
-    pSeeking->crst = crit_sect;
-    return S_OK;
-}
-
-HRESULT WINAPI MediaSeekingImpl_GetCapabilities(IMediaSeeking * iface, DWORD * pCapabilities)
-{
-    MediaSeekingImpl *This = (MediaSeekingImpl *)iface;
-
-    TRACE("(%p)\n", pCapabilities);
-
-    *pCapabilities = This->dwCapabilities;
-
-    return S_OK;
-}
-
-HRESULT WINAPI MediaSeekingImpl_CheckCapabilities(IMediaSeeking * iface, DWORD * pCapabilities)
-{
-    MediaSeekingImpl *This = (MediaSeekingImpl *)iface;
-    HRESULT hr;
-    DWORD dwCommonCaps;
-
-    TRACE("(%p)\n", pCapabilities);
-
-    if (!pCapabilities)
-        return E_POINTER;
-
-    dwCommonCaps = *pCapabilities & This->dwCapabilities;
-
-    if (!dwCommonCaps)
-        hr = E_FAIL;
-    else
-        hr = (*pCapabilities == dwCommonCaps) ?  S_OK : S_FALSE;
-    *pCapabilities = dwCommonCaps;
-    return hr;
-}
-
-HRESULT WINAPI MediaSeekingImpl_IsFormatSupported(IMediaSeeking * iface, const GUID * pFormat)
-{
-    TRACE("(%s)\n", qzdebugstr_guid(pFormat));
-
-    return (IsEqualIID(pFormat, &TIME_FORMAT_MEDIA_TIME) ? S_OK : S_FALSE);
-}
-
-HRESULT WINAPI MediaSeekingImpl_QueryPreferredFormat(IMediaSeeking * iface, GUID * pFormat)
-{
-    TRACE("(%s)\n", qzdebugstr_guid(pFormat));
-
-    *pFormat = TIME_FORMAT_MEDIA_TIME;
-    return S_OK;
-}
-
-HRESULT WINAPI MediaSeekingImpl_GetTimeFormat(IMediaSeeking * iface, GUID * pFormat)
-{
-    MediaSeekingImpl *This = (MediaSeekingImpl *)iface;
-    TRACE("(%s)\n", qzdebugstr_guid(pFormat));
-
-    EnterCriticalSection(This->crst);
-    *pFormat = This->timeformat;
-    LeaveCriticalSection(This->crst);
-
-    return S_OK;
-}
-
-HRESULT WINAPI MediaSeekingImpl_IsUsingTimeFormat(IMediaSeeking * iface, const GUID * pFormat)
-{
-    MediaSeekingImpl *This = (MediaSeekingImpl *)iface;
-    HRESULT hr = S_OK;
-
-    TRACE("(%s)\n", qzdebugstr_guid(pFormat));
-
-    EnterCriticalSection(This->crst);
-    if (!IsEqualIID(pFormat, &This->timeformat))
-        hr = S_FALSE;
-    LeaveCriticalSection(This->crst);
-
-    return hr;
-}
-
-HRESULT WINAPI MediaSeekingImpl_SetTimeFormat(IMediaSeeking * iface, const GUID * pFormat)
-{
-    MediaSeekingImpl *This = (MediaSeekingImpl *)iface;
-    TRACE("%p %s\n", This, qzdebugstr_guid(pFormat));
-    return (IsEqualIID(pFormat, &TIME_FORMAT_MEDIA_TIME) ? S_OK : E_INVALIDARG);
-}
-
-
-HRESULT WINAPI MediaSeekingImpl_GetDuration(IMediaSeeking * iface, LONGLONG * pDuration)
-{
-    MediaSeekingImpl *This = (MediaSeekingImpl *)iface;
-
-    TRACE("(%p)\n", pDuration);
-
-    EnterCriticalSection(This->crst);
-    *pDuration = This->llDuration;
-    LeaveCriticalSection(This->crst);
-
-    return S_OK;
-}
-
-HRESULT WINAPI MediaSeekingImpl_GetStopPosition(IMediaSeeking * iface, LONGLONG * pStop)
-{
-    MediaSeekingImpl *This = (MediaSeekingImpl *)iface;
-
-    TRACE("(%p)\n", pStop);
-
-    EnterCriticalSection(This->crst);
-    *pStop = This->llStop;
-    LeaveCriticalSection(This->crst);
-
-    return S_OK;
-}
-
-/* FIXME: Make use of the info the filter should expose */
-HRESULT WINAPI MediaSeekingImpl_GetCurrentPosition(IMediaSeeking * iface, LONGLONG * pCurrent)
-{
-    MediaSeekingImpl *This = (MediaSeekingImpl *)iface;
-
-    TRACE("(%p)\n", pCurrent);
-
-    EnterCriticalSection(This->crst);
-    *pCurrent = This->llCurrent;
-    LeaveCriticalSection(This->crst);
-
-    return S_OK;
-}
-
-HRESULT WINAPI MediaSeekingImpl_ConvertTimeFormat(IMediaSeeking * iface, LONGLONG * pTarget, const GUID * pTargetFormat, LONGLONG Source, const GUID * pSourceFormat)
-{
-    if (IsEqualIID(pTargetFormat, &TIME_FORMAT_MEDIA_TIME) && IsEqualIID(pSourceFormat, &TIME_FORMAT_MEDIA_TIME))
-    {
-        *pTarget = Source;
-        return S_OK;
-    }
-    /* FIXME: clear pTarget? */
-    return E_INVALIDARG;
-}
-
-static inline LONGLONG Adjust(LONGLONG value, const LONGLONG * pModifier, DWORD dwFlags)
-{
-    switch (dwFlags & AM_SEEKING_PositioningBitsMask)
-    {
-    case AM_SEEKING_NoPositioning:
-        return value;
-    case AM_SEEKING_AbsolutePositioning:
-        return *pModifier;
-    case AM_SEEKING_RelativePositioning:
-    case AM_SEEKING_IncrementalPositioning:
-        return value + *pModifier;
-    default:
-        assert(FALSE);
-        return 0;
-    }
-}
-
-HRESULT WINAPI MediaSeekingImpl_SetPositions(IMediaSeeking * iface, LONGLONG * pCurrent, DWORD dwCurrentFlags, LONGLONG * pStop, DWORD dwStopFlags)
-{
-    MediaSeekingImpl *This = (MediaSeekingImpl *)iface;
-    BOOL bChangeCurrent = FALSE, bChangeStop = FALSE;
-    LONGLONG llNewCurrent, llNewStop;
-
-    TRACE("(%p, %x, %p, %x)\n", pCurrent, dwCurrentFlags, pStop, dwStopFlags);
-    EnterCriticalSection(This->crst);
-
-    llNewCurrent = Adjust(This->llCurrent, pCurrent, dwCurrentFlags);
-    llNewStop = Adjust(This->llStop, pStop, dwStopFlags);
-
-    if (pCurrent)
-        bChangeCurrent = TRUE;
-    if (llNewStop != This->llStop)
-        bChangeStop = TRUE;
-
-    TRACE("Old: %u, New: %u\n", (DWORD)(This->llCurrent/10000000), (DWORD)(llNewCurrent/10000000));
-
-    This->llCurrent = llNewCurrent;
-    This->llStop = llNewStop;
-
-    if (pCurrent && (dwCurrentFlags & AM_SEEKING_ReturnTime))
-        *pCurrent = llNewCurrent;
-    if (pStop && (dwStopFlags & AM_SEEKING_ReturnTime))
-        *pStop = llNewStop;
-    LeaveCriticalSection(This->crst);
-
-    if (bChangeCurrent)
-        This->fnChangeCurrent(This->pUserData);
-    if (bChangeStop)
-        This->fnChangeStop(This->pUserData);
-
-    return S_OK;
-}
-
-HRESULT WINAPI MediaSeekingImpl_GetPositions(IMediaSeeking * iface, LONGLONG * pCurrent, LONGLONG * pStop)
-{
-    MediaSeekingImpl *This = (MediaSeekingImpl *)iface;
-
-    TRACE("(%p, %p)\n", pCurrent, pStop);
-
-    EnterCriticalSection(This->crst);
-    IMediaSeeking_GetCurrentPosition(iface, pCurrent);
-    IMediaSeeking_GetStopPosition(iface, pStop);
-    LeaveCriticalSection(This->crst);
-
-    return S_OK;
-}
-
-HRESULT WINAPI MediaSeekingImpl_GetAvailable(IMediaSeeking * iface, LONGLONG * pEarliest, LONGLONG * pLatest)
-{
-    MediaSeekingImpl *This = (MediaSeekingImpl *)iface;
-
-    TRACE("(%p, %p)\n", pEarliest, pLatest);
-
-    EnterCriticalSection(This->crst);
-    *pEarliest = 0;
-    *pLatest = This->llDuration;
-    LeaveCriticalSection(This->crst);
-
-    return S_OK;
-}
-
-HRESULT WINAPI MediaSeekingImpl_SetRate(IMediaSeeking * iface, double dRate)
-{
-    MediaSeekingImpl *This = (MediaSeekingImpl *)iface;
-    BOOL bChangeRate = (dRate != This->dRate);
-    HRESULT hr = S_OK;
-
-    TRACE("(%e)\n", dRate);
-
-    if (dRate > 100 || dRate < .001)
-    {
-        FIXME("Excessive rate %e, ignoring\n", dRate);
-        return VFW_E_UNSUPPORTED_AUDIO;
-    }
-
-    EnterCriticalSection(This->crst);
-    This->dRate = dRate;
-    if (bChangeRate)
-        hr = This->fnChangeRate(This->pUserData);
-    LeaveCriticalSection(This->crst);
-
-    return hr;
-}
-
-HRESULT WINAPI MediaSeekingImpl_GetRate(IMediaSeeking * iface, double * dRate)
-{
-    MediaSeekingImpl *This = (MediaSeekingImpl *)iface;
-
-    TRACE("(%p)\n", dRate);
-
-    EnterCriticalSection(This->crst);
-    /* Forward? */
-    *dRate = This->dRate;
-    LeaveCriticalSection(This->crst);
-
-    return S_OK;
-}
-
-HRESULT WINAPI MediaSeekingImpl_GetPreroll(IMediaSeeking * iface, LONGLONG * pPreroll)
-{
-    TRACE("(%p)\n", pPreroll);
-
-    *pPreroll = 0;
-    return S_OK;
-}
-
 static HRESULT WINAPI MediaSeekingPassThru_QueryInterface(IMediaSeeking *iface, REFIID riid, LPVOID *ppvObj)
 {
     ICOM_THIS_MULTI(PassThruImpl, IMediaSeeking_vtbl, iface);
diff --git a/dlls/quartz/control_private.h b/dlls/quartz/control_private.h
index a3ca7c7..016a675 100644
--- a/dlls/quartz/control_private.h
+++ b/dlls/quartz/control_private.h
@@ -21,44 +21,6 @@
 #ifndef QUARTZ_CONTROL_H
 #define QUARTZ_CONTROL_H
 
-typedef HRESULT (* CHANGEPROC)(IBaseFilter *pUserData);
-
-typedef struct MediaSeekingImpl
-{
-	const IMediaSeekingVtbl * lpVtbl;
-
-	ULONG refCount;
-	IBaseFilter *pUserData;
-	CHANGEPROC fnChangeStop;
-	CHANGEPROC fnChangeCurrent;
-	CHANGEPROC fnChangeRate;
-	DWORD dwCapabilities;
-	double dRate;
-	LONGLONG llCurrent, llStop, llDuration;
-	GUID timeformat;
-	PCRITICAL_SECTION crst;
-} MediaSeekingImpl;
-
-HRESULT MediaSeekingImpl_Init(IBaseFilter *pUserData, CHANGEPROC fnChangeStop, CHANGEPROC fnChangeCurrent, CHANGEPROC fnChangeRate, MediaSeekingImpl * pSeeking, PCRITICAL_SECTION crit_sect);
-
-HRESULT WINAPI MediaSeekingImpl_GetCapabilities(IMediaSeeking * iface, DWORD * pCapabilities);
-HRESULT WINAPI MediaSeekingImpl_CheckCapabilities(IMediaSeeking * iface, DWORD * pCapabilities);
-HRESULT WINAPI MediaSeekingImpl_IsFormatSupported(IMediaSeeking * iface, const GUID * pFormat);
-HRESULT WINAPI MediaSeekingImpl_QueryPreferredFormat(IMediaSeeking * iface, GUID * pFormat);
-HRESULT WINAPI MediaSeekingImpl_GetTimeFormat(IMediaSeeking * iface, GUID * pFormat);
-HRESULT WINAPI MediaSeekingImpl_IsUsingTimeFormat(IMediaSeeking * iface, const GUID * pFormat);
-HRESULT WINAPI MediaSeekingImpl_SetTimeFormat(IMediaSeeking * iface, const GUID * pFormat);
-HRESULT WINAPI MediaSeekingImpl_GetDuration(IMediaSeeking * iface, LONGLONG * pDuration);
-HRESULT WINAPI MediaSeekingImpl_GetStopPosition(IMediaSeeking * iface, LONGLONG * pStop);
-HRESULT WINAPI MediaSeekingImpl_GetCurrentPosition(IMediaSeeking * iface, LONGLONG * pCurrent);
-HRESULT WINAPI MediaSeekingImpl_ConvertTimeFormat(IMediaSeeking * iface, LONGLONG * pTarget, const GUID * pTargetFormat, LONGLONG Source, const GUID * pSourceFormat);
-HRESULT WINAPI MediaSeekingImpl_SetPositions(IMediaSeeking * iface, LONGLONG * pCurrent, DWORD dwCurrentFlags, LONGLONG * pStop, DWORD dwStopFlags);
-HRESULT WINAPI MediaSeekingImpl_GetPositions(IMediaSeeking * iface, LONGLONG * pCurrent, LONGLONG * pStop);
-HRESULT WINAPI MediaSeekingImpl_GetAvailable(IMediaSeeking * iface, LONGLONG * pEarliest, LONGLONG * pLatest);
-HRESULT WINAPI MediaSeekingImpl_SetRate(IMediaSeeking * iface, double dRate);
-HRESULT WINAPI MediaSeekingImpl_GetRate(IMediaSeeking * iface, double * dRate);
-HRESULT WINAPI MediaSeekingImpl_GetPreroll(IMediaSeeking * iface, LONGLONG * pPreroll);
-
 void MediaSeekingPassThru_RegisterMediaTime(IUnknown *iface, REFERENCE_TIME start);
 void MediaSeekingPassThru_ResetMediaTime(IUnknown *iface);
 void MediaSeekingPassThru_EOS(IUnknown *iface);
diff --git a/dlls/quartz/mpegsplit.c b/dlls/quartz/mpegsplit.c
index 0cffb19..8321131 100644
--- a/dlls/quartz/mpegsplit.c
+++ b/dlls/quartz/mpegsplit.c
@@ -77,6 +77,11 @@
     struct seek_entry *seektable;
 } MPEGSplitterImpl;
 
+static inline MPEGSplitterImpl *impl_from_IMediaSeeking( IMediaSeeking *iface )
+{
+    return (MPEGSplitterImpl *)((char*)iface - FIELD_OFFSET(MPEGSplitterImpl, Parser.sourceSeeking.lpVtbl));
+}
+
 static int MPEGSplitter_head_check(const BYTE *header)
 {
     /* If this is a possible start code, check for a system or video header */
@@ -280,7 +285,7 @@
         }
     }
 
-    if (BYTES_FROM_MEDIATIME(tStop) >= This->EndOfFile || This->position >= This->Parser.mediaSeeking.llStop)
+    if (BYTES_FROM_MEDIATIME(tStop) >= This->EndOfFile || This->position >= This->Parser.sourceSeeking.llStop)
     {
         unsigned int i;
 
@@ -587,9 +592,9 @@
             TRACE("Parsing took %u ms\n", GetTickCount() - ticks);
             This->duration = duration;
 
-            This->Parser.mediaSeeking.llCurrent = 0;
-            This->Parser.mediaSeeking.llDuration = duration;
-            This->Parser.mediaSeeking.llStop = duration;
+            This->Parser.sourceSeeking.llCurrent = 0;
+            This->Parser.sourceSeeking.llDuration = duration;
+            This->Parser.sourceSeeking.llStop = duration;
             break;
         }
         case MPEG_VIDEO_HEADER:
@@ -618,15 +623,15 @@
     return S_OK;
 }
 
-static HRESULT MPEGSplitter_seek(IBaseFilter *iface)
+static HRESULT WINAPI MPEGSplitter_seek(IMediaSeeking *iface)
 {
-    MPEGSplitterImpl *This = (MPEGSplitterImpl*)iface;
+    MPEGSplitterImpl *This = impl_from_IMediaSeeking(iface);
     PullPin *pPin = This->Parser.pInputPin;
     LONGLONG newpos, timepos, bytepos;
     HRESULT hr = S_OK;
     BYTE header[4];
 
-    newpos = This->Parser.mediaSeeking.llCurrent;
+    newpos = This->Parser.sourceSeeking.llCurrent;
 
     if (newpos > This->duration)
     {
diff --git a/dlls/quartz/parser.c b/dlls/quartz/parser.c
index 5d95f60..efa68f6 100644
--- a/dlls/quartz/parser.c
+++ b/dlls/quartz/parser.c
@@ -20,7 +20,6 @@
  */
 
 #include "quartz_private.h"
-#include "control_private.h"
 #include "pin.h"
 
 #include "vfwmsgs.h"
@@ -41,13 +40,13 @@
 static const IPinVtbl Parser_OutputPin_Vtbl;
 static const IPinVtbl Parser_InputPin_Vtbl;
 
-static HRESULT Parser_ChangeCurrent(IBaseFilter *iface);
-static HRESULT Parser_ChangeStop(IBaseFilter *iface);
-static HRESULT Parser_ChangeRate(IBaseFilter *iface);
+static HRESULT WINAPI Parser_ChangeStart(IMediaSeeking *iface);
+static HRESULT WINAPI Parser_ChangeStop(IMediaSeeking *iface);
+static HRESULT WINAPI Parser_ChangeRate(IMediaSeeking *iface);
 
 static inline ParserImpl *impl_from_IMediaSeeking( IMediaSeeking *iface )
 {
-    return (ParserImpl *)((char*)iface - FIELD_OFFSET(ParserImpl, mediaSeeking.lpVtbl));
+    return (ParserImpl *)((char*)iface - FIELD_OFFSET(ParserImpl, sourceSeeking.lpVtbl));
 }
 
 /* FIXME: WRONG */
@@ -72,7 +71,7 @@
     return This->cStreams;
 }
 
-HRESULT Parser_Create(ParserImpl* pParser, const IBaseFilterVtbl *Parser_Vtbl, const CLSID* pClsid, PFN_PROCESS_SAMPLE fnProcessSample, PFN_QUERY_ACCEPT fnQueryAccept, PFN_PRE_CONNECT fnPreConnect, PFN_CLEANUP fnCleanup, PFN_DISCONNECT fnDisconnect, REQUESTPROC fnRequest, STOPPROCESSPROC fnDone, CHANGEPROC stop, CHANGEPROC current, CHANGEPROC rate)
+HRESULT Parser_Create(ParserImpl* pParser, const IBaseFilterVtbl *Parser_Vtbl, const CLSID* pClsid, PFN_PROCESS_SAMPLE fnProcessSample, PFN_QUERY_ACCEPT fnQueryAccept, PFN_PRE_CONNECT fnPreConnect, PFN_CLEANUP fnCleanup, PFN_DISCONNECT fnDisconnect, REQUESTPROC fnRequest, STOPPROCESSPROC fnDone, SourceSeeking_ChangeStop stop, SourceSeeking_ChangeStart start, SourceSeeking_ChangeRate rate)
 {
     HRESULT hr;
     PIN_INFO piInput;
@@ -90,8 +89,8 @@
     piInput.pFilter = (IBaseFilter *)pParser;
     lstrcpynW(piInput.achName, wcsInputPinName, sizeof(piInput.achName) / sizeof(piInput.achName[0]));
 
-    if (!current)
-        current = Parser_ChangeCurrent;
+    if (!start)
+        start = Parser_ChangeStart;
 
     if (!stop)
         stop = Parser_ChangeStop;
@@ -99,8 +98,7 @@
     if (!rate)
         rate = Parser_ChangeRate;
 
-    MediaSeekingImpl_Init((IBaseFilter*)pParser, stop, current, rate, &pParser->mediaSeeking, &pParser->filter.csFilter);
-    pParser->mediaSeeking.lpVtbl = &Parser_Seeking_Vtbl;
+    SourceSeeking_Init(&pParser->sourceSeeking, &Parser_Seeking_Vtbl, stop, start, rate,  &pParser->filter.csFilter);
 
     hr = PullPin_Construct(&Parser_InputPin_Vtbl, &piInput, fnProcessSample, (LPVOID)pParser, fnQueryAccept, fnCleanup, fnRequest, fnDone, &pParser->filter.csFilter, (IPin **)&pParser->pInputPin);
 
@@ -466,19 +464,19 @@
     return S_OK;
 }
 
-static HRESULT Parser_ChangeCurrent(IBaseFilter *iface)
+static HRESULT WINAPI Parser_ChangeStart(IMediaSeeking *iface)
 {
-    FIXME("(%p) filter hasn't implemented current position change!\n", iface);
+    FIXME("(%p) filter hasn't implemented start position change!\n", iface);
     return S_OK;
 }
 
-static HRESULT Parser_ChangeStop(IBaseFilter *iface)
+static HRESULT WINAPI Parser_ChangeStop(IMediaSeeking *iface)
 {
     FIXME("(%p) filter hasn't implemented stop position change!\n", iface);
     return S_OK;
 }
 
-static HRESULT Parser_ChangeRate(IBaseFilter *iface)
+static HRESULT WINAPI Parser_ChangeRate(IMediaSeeking *iface)
 {
     FIXME("(%p) filter hasn't implemented rate change!\n", iface);
     return S_OK;
@@ -511,23 +509,23 @@
     Parser_Seeking_QueryInterface,
     Parser_Seeking_AddRef,
     Parser_Seeking_Release,
-    MediaSeekingImpl_GetCapabilities,
-    MediaSeekingImpl_CheckCapabilities,
-    MediaSeekingImpl_IsFormatSupported,
-    MediaSeekingImpl_QueryPreferredFormat,
-    MediaSeekingImpl_GetTimeFormat,
-    MediaSeekingImpl_IsUsingTimeFormat,
-    MediaSeekingImpl_SetTimeFormat,
-    MediaSeekingImpl_GetDuration,
-    MediaSeekingImpl_GetStopPosition,
-    MediaSeekingImpl_GetCurrentPosition,
-    MediaSeekingImpl_ConvertTimeFormat,
-    MediaSeekingImpl_SetPositions,
-    MediaSeekingImpl_GetPositions,
-    MediaSeekingImpl_GetAvailable,
-    MediaSeekingImpl_SetRate,
-    MediaSeekingImpl_GetRate,
-    MediaSeekingImpl_GetPreroll
+    SourceSeekingImpl_GetCapabilities,
+    SourceSeekingImpl_CheckCapabilities,
+    SourceSeekingImpl_IsFormatSupported,
+    SourceSeekingImpl_QueryPreferredFormat,
+    SourceSeekingImpl_GetTimeFormat,
+    SourceSeekingImpl_IsUsingTimeFormat,
+    SourceSeekingImpl_SetTimeFormat,
+    SourceSeekingImpl_GetDuration,
+    SourceSeekingImpl_GetStopPosition,
+    SourceSeekingImpl_GetCurrentPosition,
+    SourceSeekingImpl_ConvertTimeFormat,
+    SourceSeekingImpl_SetPositions,
+    SourceSeekingImpl_GetPositions,
+    SourceSeekingImpl_GetAvailable,
+    SourceSeekingImpl_SetRate,
+    SourceSeekingImpl_GetRate,
+    SourceSeekingImpl_GetPreroll
 };
 
 static HRESULT WINAPI Parser_OutputPin_GetMediaType(IPin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
diff --git a/dlls/quartz/parser.h b/dlls/quartz/parser.h
index a88b2ad..3103c19 100644
--- a/dlls/quartz/parser.h
+++ b/dlls/quartz/parser.h
@@ -36,7 +36,7 @@
     PullPin * pInputPin;
     IPin ** ppPins;
     ULONG cStreams;
-    MediaSeekingImpl mediaSeeking;
+    SourceSeeking sourceSeeking;
 };
 
 typedef struct Parser_OutputPin
@@ -50,7 +50,7 @@
 extern HRESULT Parser_AddPin(ParserImpl * This, const PIN_INFO * piOutput, ALLOCATOR_PROPERTIES * props, const AM_MEDIA_TYPE * amt);
 
 extern HRESULT Parser_Create(ParserImpl*, const IBaseFilterVtbl *, const CLSID*, PFN_PROCESS_SAMPLE, PFN_QUERY_ACCEPT, PFN_PRE_CONNECT,
-                             PFN_CLEANUP, PFN_DISCONNECT, REQUESTPROC, STOPPROCESSPROC, CHANGEPROC stop, CHANGEPROC current, CHANGEPROC rate);
+                             PFN_CLEANUP, PFN_DISCONNECT, REQUESTPROC, STOPPROCESSPROC, SourceSeeking_ChangeStop stop, SourceSeeking_ChangeStart start, SourceSeeking_ChangeRate rate);
 
 /* Override the _Release function and call this when releasing */
 extern void Parser_Destroy(ParserImpl *This);
diff --git a/dlls/quartz/videorenderer.c b/dlls/quartz/videorenderer.c
index 7975e4d..86e2607 100644
--- a/dlls/quartz/videorenderer.c
+++ b/dlls/quartz/videorenderer.c
@@ -82,7 +82,6 @@
     BOOL bUnkOuterValid;
     BOOL bAggregatable;
     REFERENCE_TIME rtLastStop;
-    MediaSeekingImpl mediaSeeking;
     LONG WindowStyle;
 
     /* During pause we can hold a single sample, for use in GetCurrentImage */
diff --git a/dlls/quartz/waveparser.c b/dlls/quartz/waveparser.c
index 952aad9..0ac6384 100644
--- a/dlls/quartz/waveparser.c
+++ b/dlls/quartz/waveparser.c
@@ -49,6 +49,11 @@
     DWORD dwLength;
 } WAVEParserImpl;
 
+static inline WAVEParserImpl *impl_from_IMediaSeeking( IMediaSeeking *iface )
+{
+    return (WAVEParserImpl*)((char*)iface - FIELD_OFFSET(WAVEParserImpl, Parser.sourceSeeking.lpVtbl));
+}
+
 static LONGLONG bytepos_to_duration(WAVEParserImpl *This, LONGLONG bytepos)
 {
     LONGLONG duration = BYTES_FROM_MEDIATIME(bytepos - This->StartOfFile);
@@ -140,7 +145,7 @@
             This->Parser.pInputPin->rtCurrent = tStart;
     }
 
-    if (tStop >= This->EndOfFile || (bytepos_to_duration(This, tStop) >= This->Parser.mediaSeeking.llStop) || hr == VFW_E_NOT_CONNECTED)
+    if (tStop >= This->EndOfFile || (bytepos_to_duration(This, tStop) >= This->Parser.sourceSeeking.llStop) || hr == VFW_E_NOT_CONNECTED)
     {
         unsigned int i;
 
@@ -184,14 +189,14 @@
     return S_FALSE;
 }
 
-static HRESULT WAVEParserImpl_seek(IBaseFilter *iface)
+static HRESULT WINAPI WAVEParserImpl_seek(IMediaSeeking *iface)
 {
-    WAVEParserImpl *This = (WAVEParserImpl *)iface;
+    WAVEParserImpl *This = impl_from_IMediaSeeking(iface);
     PullPin *pPin = This->Parser.pInputPin;
     IPin *victim = NULL;
     LONGLONG newpos, curpos, endpos, bytepos;
 
-    newpos = This->Parser.mediaSeeking.llCurrent;
+    newpos = This->Parser.sourceSeeking.llCurrent;
     curpos = bytepos_to_duration(This, pPin->rtCurrent);
     endpos = bytepos_to_duration(This, This->EndOfFile);
     bytepos = duration_to_bytepos(This, newpos);
@@ -319,9 +324,9 @@
     hr = Parser_AddPin(&(pWAVEParser->Parser), &piOutput, props, &amt);
     CoTaskMemFree(amt.pbFormat);
 
-    pWAVEParser->Parser.mediaSeeking.llCurrent = 0;
-    pWAVEParser->Parser.mediaSeeking.llStop = pWAVEParser->Parser.mediaSeeking.llDuration = bytepos_to_duration(pWAVEParser, pWAVEParser->EndOfFile);
-    TRACE("Duration: %u seconds\n", (DWORD)(pWAVEParser->Parser.mediaSeeking.llDuration / (LONGLONG)10000000));
+    pWAVEParser->Parser.sourceSeeking.llCurrent = 0;
+    pWAVEParser->Parser.sourceSeeking.llStop = pWAVEParser->Parser.sourceSeeking.llDuration = bytepos_to_duration(pWAVEParser, pWAVEParser->EndOfFile);
+    TRACE("Duration: %u seconds\n", (DWORD)(pWAVEParser->Parser.sourceSeeking.llDuration / (LONGLONG)10000000));
 
     This->rtStop = pWAVEParser->EndOfFile;
     This->rtStart = pWAVEParser->StartOfFile;
diff --git a/dlls/strmbase/Makefile.in b/dlls/strmbase/Makefile.in
index 938e478..848049d 100644
--- a/dlls/strmbase/Makefile.in
+++ b/dlls/strmbase/Makefile.in
@@ -5,6 +5,7 @@
 	filter.c \
 	mediatype.c \
 	pin.c \
+	seeking.c \
 	transform.c
 
 @MAKE_IMPLIB_RULES@
diff --git a/dlls/strmbase/seeking.c b/dlls/strmbase/seeking.c
new file mode 100644
index 0000000..93fc6db
--- /dev/null
+++ b/dlls/strmbase/seeking.c
@@ -0,0 +1,315 @@
+/*
+ * Filter Seeking and Control Interfaces
+ *
+ * Copyright 2003 Robert Shearman
+ * 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
+ */
+/* FIXME: critical sections */
+
+#define COBJMACROS
+
+#include "dshow.h"
+#include "wine/strmbase.h"
+
+#include "uuids.h"
+#include "wine/debug.h"
+
+#include <assert.h>
+
+WINE_DEFAULT_DEBUG_CHANNEL(strmbase);
+
+HRESULT SourceSeeking_Init(SourceSeeking *pSeeking, const IMediaSeekingVtbl *Vtbl, SourceSeeking_ChangeStop fnChangeStop, SourceSeeking_ChangeStart fnChangeStart, SourceSeeking_ChangeRate fnChangeRate, PCRITICAL_SECTION crit_sect)
+{
+    assert(fnChangeStop && fnChangeStart && fnChangeRate);
+
+    pSeeking->lpVtbl = Vtbl;
+    pSeeking->refCount = 1;
+    pSeeking->fnChangeRate = fnChangeRate;
+    pSeeking->fnChangeStop = fnChangeStop;
+    pSeeking->fnChangeStart = fnChangeStart;
+    pSeeking->dwCapabilities = AM_SEEKING_CanSeekForwards |
+        AM_SEEKING_CanSeekBackwards |
+        AM_SEEKING_CanSeekAbsolute |
+        AM_SEEKING_CanGetStopPos |
+        AM_SEEKING_CanGetDuration;
+    pSeeking->llCurrent = 0;
+    pSeeking->llStop = ((ULONGLONG)0x80000000) << 32;
+    pSeeking->llDuration = pSeeking->llStop;
+    pSeeking->dRate = 1.0;
+    pSeeking->timeformat = TIME_FORMAT_MEDIA_TIME;
+    pSeeking->crst = crit_sect;
+    return S_OK;
+}
+
+HRESULT WINAPI SourceSeekingImpl_GetCapabilities(IMediaSeeking * iface, DWORD * pCapabilities)
+{
+    SourceSeeking *This = (SourceSeeking *)iface;
+
+    TRACE("(%p)\n", pCapabilities);
+
+    *pCapabilities = This->dwCapabilities;
+
+    return S_OK;
+}
+
+HRESULT WINAPI SourceSeekingImpl_CheckCapabilities(IMediaSeeking * iface, DWORD * pCapabilities)
+{
+    SourceSeeking *This = (SourceSeeking *)iface;
+    HRESULT hr;
+    DWORD dwCommonCaps;
+
+    TRACE("(%p)\n", pCapabilities);
+
+    if (!pCapabilities)
+        return E_POINTER;
+
+    dwCommonCaps = *pCapabilities & This->dwCapabilities;
+
+    if (!dwCommonCaps)
+        hr = E_FAIL;
+    else
+        hr = (*pCapabilities == dwCommonCaps) ?  S_OK : S_FALSE;
+    *pCapabilities = dwCommonCaps;
+    return hr;
+}
+
+HRESULT WINAPI SourceSeekingImpl_IsFormatSupported(IMediaSeeking * iface, const GUID * pFormat)
+{
+    TRACE("(%s)\n", debugstr_guid(pFormat));
+
+    return (IsEqualIID(pFormat, &TIME_FORMAT_MEDIA_TIME) ? S_OK : S_FALSE);
+}
+
+HRESULT WINAPI SourceSeekingImpl_QueryPreferredFormat(IMediaSeeking * iface, GUID * pFormat)
+{
+    TRACE("(%s)\n", debugstr_guid(pFormat));
+
+    *pFormat = TIME_FORMAT_MEDIA_TIME;
+    return S_OK;
+}
+
+HRESULT WINAPI SourceSeekingImpl_GetTimeFormat(IMediaSeeking * iface, GUID * pFormat)
+{
+    SourceSeeking *This = (SourceSeeking *)iface;
+    TRACE("(%s)\n", debugstr_guid(pFormat));
+
+    EnterCriticalSection(This->crst);
+    *pFormat = This->timeformat;
+    LeaveCriticalSection(This->crst);
+
+    return S_OK;
+}
+
+HRESULT WINAPI SourceSeekingImpl_IsUsingTimeFormat(IMediaSeeking * iface, const GUID * pFormat)
+{
+    SourceSeeking *This = (SourceSeeking *)iface;
+    HRESULT hr = S_OK;
+
+    TRACE("(%s)\n", debugstr_guid(pFormat));
+
+    EnterCriticalSection(This->crst);
+    if (!IsEqualIID(pFormat, &This->timeformat))
+        hr = S_FALSE;
+    LeaveCriticalSection(This->crst);
+
+    return hr;
+}
+
+HRESULT WINAPI SourceSeekingImpl_SetTimeFormat(IMediaSeeking * iface, const GUID * pFormat)
+{
+    SourceSeeking *This = (SourceSeeking *)iface;
+    TRACE("%p %s\n", This, debugstr_guid(pFormat));
+    return (IsEqualIID(pFormat, &TIME_FORMAT_MEDIA_TIME) ? S_OK : E_INVALIDARG);
+}
+
+
+HRESULT WINAPI SourceSeekingImpl_GetDuration(IMediaSeeking * iface, LONGLONG * pDuration)
+{
+    SourceSeeking *This = (SourceSeeking *)iface;
+
+    TRACE("(%p)\n", pDuration);
+
+    EnterCriticalSection(This->crst);
+    *pDuration = This->llDuration;
+    LeaveCriticalSection(This->crst);
+
+    return S_OK;
+}
+
+HRESULT WINAPI SourceSeekingImpl_GetStopPosition(IMediaSeeking * iface, LONGLONG * pStop)
+{
+    SourceSeeking *This = (SourceSeeking *)iface;
+
+    TRACE("(%p)\n", pStop);
+
+    EnterCriticalSection(This->crst);
+    *pStop = This->llStop;
+    LeaveCriticalSection(This->crst);
+
+    return S_OK;
+}
+
+/* FIXME: Make use of the info the filter should expose */
+HRESULT WINAPI SourceSeekingImpl_GetCurrentPosition(IMediaSeeking * iface, LONGLONG * pCurrent)
+{
+    SourceSeeking *This = (SourceSeeking *)iface;
+
+    TRACE("(%p)\n", pCurrent);
+
+    EnterCriticalSection(This->crst);
+    *pCurrent = This->llCurrent;
+    LeaveCriticalSection(This->crst);
+
+    return S_OK;
+}
+
+HRESULT WINAPI SourceSeekingImpl_ConvertTimeFormat(IMediaSeeking * iface, LONGLONG * pTarget, const GUID * pTargetFormat, LONGLONG Source, const GUID * pSourceFormat)
+{
+    if (IsEqualIID(pTargetFormat, &TIME_FORMAT_MEDIA_TIME) && IsEqualIID(pSourceFormat, &TIME_FORMAT_MEDIA_TIME))
+    {
+        *pTarget = Source;
+        return S_OK;
+    }
+    /* FIXME: clear pTarget? */
+    return E_INVALIDARG;
+}
+
+static inline LONGLONG Adjust(LONGLONG value, const LONGLONG * pModifier, DWORD dwFlags)
+{
+    switch (dwFlags & AM_SEEKING_PositioningBitsMask)
+    {
+    case AM_SEEKING_NoPositioning:
+        return value;
+    case AM_SEEKING_AbsolutePositioning:
+        return *pModifier;
+    case AM_SEEKING_RelativePositioning:
+    case AM_SEEKING_IncrementalPositioning:
+        return value + *pModifier;
+    default:
+        assert(FALSE);
+        return 0;
+    }
+}
+
+HRESULT WINAPI SourceSeekingImpl_SetPositions(IMediaSeeking * iface, LONGLONG * pCurrent, DWORD dwCurrentFlags, LONGLONG * pStop, DWORD dwStopFlags)
+{
+    SourceSeeking *This = (SourceSeeking *)iface;
+    BOOL bChangeCurrent = FALSE, bChangeStop = FALSE;
+    LONGLONG llNewCurrent, llNewStop;
+
+    TRACE("(%p, %x, %p, %x)\n", pCurrent, dwCurrentFlags, pStop, dwStopFlags);
+    EnterCriticalSection(This->crst);
+
+    llNewCurrent = Adjust(This->llCurrent, pCurrent, dwCurrentFlags);
+    llNewStop = Adjust(This->llStop, pStop, dwStopFlags);
+
+    if (pCurrent)
+        bChangeCurrent = TRUE;
+    if (llNewStop != This->llStop)
+        bChangeStop = TRUE;
+
+    TRACE("Old: %u, New: %u\n", (DWORD)(This->llCurrent/10000000), (DWORD)(llNewCurrent/10000000));
+
+    This->llCurrent = llNewCurrent;
+    This->llStop = llNewStop;
+
+    if (pCurrent && (dwCurrentFlags & AM_SEEKING_ReturnTime))
+        *pCurrent = llNewCurrent;
+    if (pStop && (dwStopFlags & AM_SEEKING_ReturnTime))
+        *pStop = llNewStop;
+    LeaveCriticalSection(This->crst);
+
+    if (bChangeCurrent)
+        This->fnChangeStart(iface);
+    if (bChangeStop)
+        This->fnChangeStop(iface);
+
+    return S_OK;
+}
+
+HRESULT WINAPI SourceSeekingImpl_GetPositions(IMediaSeeking * iface, LONGLONG * pCurrent, LONGLONG * pStop)
+{
+    SourceSeeking *This = (SourceSeeking *)iface;
+
+    TRACE("(%p, %p)\n", pCurrent, pStop);
+
+    EnterCriticalSection(This->crst);
+    IMediaSeeking_GetCurrentPosition(iface, pCurrent);
+    IMediaSeeking_GetStopPosition(iface, pStop);
+    LeaveCriticalSection(This->crst);
+
+    return S_OK;
+}
+
+HRESULT WINAPI SourceSeekingImpl_GetAvailable(IMediaSeeking * iface, LONGLONG * pEarliest, LONGLONG * pLatest)
+{
+    SourceSeeking *This = (SourceSeeking *)iface;
+
+    TRACE("(%p, %p)\n", pEarliest, pLatest);
+
+    EnterCriticalSection(This->crst);
+    *pEarliest = 0;
+    *pLatest = This->llDuration;
+    LeaveCriticalSection(This->crst);
+
+    return S_OK;
+}
+
+HRESULT WINAPI SourceSeekingImpl_SetRate(IMediaSeeking * iface, double dRate)
+{
+    SourceSeeking *This = (SourceSeeking *)iface;
+    BOOL bChangeRate = (dRate != This->dRate);
+    HRESULT hr = S_OK;
+
+    TRACE("(%e)\n", dRate);
+
+    if (dRate > 100 || dRate < .001)
+    {
+        FIXME("Excessive rate %e, ignoring\n", dRate);
+        return VFW_E_UNSUPPORTED_AUDIO;
+    }
+
+    EnterCriticalSection(This->crst);
+    This->dRate = dRate;
+    if (bChangeRate)
+        hr = This->fnChangeRate(iface);
+    LeaveCriticalSection(This->crst);
+
+    return hr;
+}
+
+HRESULT WINAPI SourceSeekingImpl_GetRate(IMediaSeeking * iface, double * dRate)
+{
+    SourceSeeking *This = (SourceSeeking *)iface;
+
+    TRACE("(%p)\n", dRate);
+
+    EnterCriticalSection(This->crst);
+    /* Forward? */
+    *dRate = This->dRate;
+    LeaveCriticalSection(This->crst);
+
+    return S_OK;
+}
+
+HRESULT WINAPI SourceSeekingImpl_GetPreroll(IMediaSeeking * iface, LONGLONG * pPreroll)
+{
+    TRACE("(%p)\n", pPreroll);
+
+    *pPreroll = 0;
+    return S_OK;
+}