diff --git a/dlls/qcap/avico.c b/dlls/qcap/avico.c
index 0371cd74c17..43cca04a064 100644
--- a/dlls/qcap/avico.c
+++ b/dlls/qcap/avico.c
@@ -406,12 +406,6 @@ static HRESULT sink_query_accept(struct strmbase_pin *base, const AM_MEDIA_TYPE
     return res == ICERR_OK ? S_OK : S_FALSE;
 }
 
-static HRESULT WINAPI AVICompressorIn_GetMediaType(struct strmbase_pin *base, int iPosition, AM_MEDIA_TYPE *amt)
-{
-    TRACE("(%p)->(%d %p)\n", base, iPosition, amt);
-    return S_FALSE;
-}
-
 static HRESULT WINAPI AVICompressorIn_Receive(BaseInputPin *base, IMediaSample *pSample)
 {
     AVICompressor *This = impl_from_strmbase_pin(&base->pin);
@@ -502,7 +496,7 @@ static HRESULT WINAPI AVICompressorIn_Receive(BaseInputPin *base, IMediaSample *
 static const BaseInputPinFuncTable AVICompressorBaseInputPinVtbl =
 {
     .base.pin_query_accept = sink_query_accept,
-    .base.pfnGetMediaType = AVICompressorIn_GetMediaType,
+    .base.pin_get_media_type = strmbase_pin_get_media_type,
     .pfnReceive = AVICompressorIn_Receive,
 };
 
@@ -532,7 +526,7 @@ static const IPinVtbl AVICompressorOutputPinVtbl = {
     BasePinImpl_NewSegment
 };
 
-static HRESULT WINAPI AVICompressorOut_GetMediaType(struct strmbase_pin *base, int iPosition, AM_MEDIA_TYPE *amt)
+static HRESULT source_get_media_type(struct strmbase_pin *base, int iPosition, AM_MEDIA_TYPE *amt)
 {
     AVICompressor *This = impl_from_strmbase_filter(base->filter);
 
@@ -580,13 +574,10 @@ static HRESULT WINAPI AVICompressorOut_DecideAllocator(struct strmbase_source *b
 
 static const struct strmbase_source_ops source_ops =
 {
-    {
-        NULL,
-        AVICompressorOut_GetMediaType
-    },
-    BaseOutputPinImpl_AttemptConnection,
-    AVICompressorOut_DecideBufferSize,
-    AVICompressorOut_DecideAllocator,
+    .base.pin_get_media_type = source_get_media_type,
+    .pfnAttemptConnection = BaseOutputPinImpl_AttemptConnection,
+    .pfnDecideBufferSize = AVICompressorOut_DecideBufferSize,
+    .pfnDecideAllocator = AVICompressorOut_DecideAllocator,
 };
 
 IUnknown* WINAPI QCAP_createAVICompressor(IUnknown *outer, HRESULT *phr)
diff --git a/dlls/qcap/avimux.c b/dlls/qcap/avimux.c
index a61ae5600e9..f969e73a8ca 100644
--- a/dlls/qcap/avimux.c
+++ b/dlls/qcap/avimux.c
@@ -1174,7 +1174,7 @@ static HRESULT WINAPI AviMuxOut_AttemptConnection(struct strmbase_source *base,
     return BaseOutputPinImpl_AttemptConnection(base, pReceivePin, pmt);
 }
 
-static HRESULT WINAPI AviMuxOut_GetMediaType(struct strmbase_pin *base, int iPosition, AM_MEDIA_TYPE *amt)
+static HRESULT source_get_media_type(struct strmbase_pin *base, int iPosition, AM_MEDIA_TYPE *amt)
 {
     TRACE("(%p)->(%d %p)\n", base, iPosition, amt);
 
@@ -1224,7 +1224,7 @@ static HRESULT WINAPI AviMuxOut_DecideAllocator(struct strmbase_source *base,
 static const struct strmbase_source_ops source_ops =
 {
     .base.pin_query_accept = source_query_accept,
-    .base.pfnGetMediaType = AviMuxOut_GetMediaType,
+    .base.pin_get_media_type = source_get_media_type,
     .pfnAttemptConnection = AviMuxOut_AttemptConnection,
     .pfnDecideAllocator = AviMuxOut_DecideAllocator,
 };
@@ -1384,11 +1384,6 @@ static HRESULT sink_query_accept(struct strmbase_pin *base, const AM_MEDIA_TYPE
     return S_FALSE;
 }
 
-static HRESULT WINAPI AviMuxIn_GetMediaType(struct strmbase_pin *base, int iPosition, AM_MEDIA_TYPE *amt)
-{
-    return S_FALSE;
-}
-
 static HRESULT WINAPI AviMuxIn_Receive(BaseInputPin *base, IMediaSample *pSample)
 {
     AviMux *avimux = impl_from_strmbase_filter(base->pin.filter);
@@ -1495,7 +1490,7 @@ static HRESULT WINAPI AviMuxIn_Receive(BaseInputPin *base, IMediaSample *pSample
 static const BaseInputPinFuncTable AviMuxIn_BaseInputFuncTable =
 {
     .base.pin_query_accept = sink_query_accept,
-    .base.pfnGetMediaType = AviMuxIn_GetMediaType,
+    .base.pin_get_media_type = strmbase_pin_get_media_type,
     .pfnReceive = AviMuxIn_Receive,
 };
 
diff --git a/dlls/qcap/smartteefilter.c b/dlls/qcap/smartteefilter.c
index 98293fb4d8e..390bfa8e20d 100644
--- a/dlls/qcap/smartteefilter.c
+++ b/dlls/qcap/smartteefilter.c
@@ -179,7 +179,7 @@ static HRESULT sink_query_accept(struct strmbase_pin *base, const AM_MEDIA_TYPE
     return S_OK;
 }
 
-static HRESULT WINAPI SmartTeeFilterInput_GetMediaType(struct strmbase_pin *base, int iPosition, AM_MEDIA_TYPE *amt)
+static HRESULT sink_get_media_type(struct strmbase_pin *base, int iPosition, AM_MEDIA_TYPE *amt)
 {
     SmartTeeFilter *This = impl_from_strmbase_pin(base);
     HRESULT hr;
@@ -322,7 +322,7 @@ static HRESULT WINAPI SmartTeeFilterInput_Receive(BaseInputPin *base, IMediaSamp
 static const BaseInputPinFuncTable SmartTeeFilterInputFuncs =
 {
     .base.pin_query_accept = sink_query_accept,
-    .base.pfnGetMediaType = SmartTeeFilterInput_GetMediaType,
+    .base.pin_get_media_type = sink_get_media_type,
     .pfnReceive = SmartTeeFilterInput_Receive,
 };
 
@@ -367,7 +367,7 @@ static HRESULT capture_query_accept(struct strmbase_pin *base, const AM_MEDIA_TY
     return S_OK;
 }
 
-static HRESULT WINAPI SmartTeeFilterCapture_GetMediaType(struct strmbase_pin *base, int iPosition, AM_MEDIA_TYPE *amt)
+static HRESULT capture_get_media_type(struct strmbase_pin *base, int iPosition, AM_MEDIA_TYPE *amt)
 {
     SmartTeeFilter *This = impl_from_strmbase_pin(base);
     TRACE("(%p, %d, %p)\n", This, iPosition, amt);
@@ -391,7 +391,7 @@ static HRESULT WINAPI SmartTeeFilterCapture_DecideAllocator(struct strmbase_sour
 static const struct strmbase_source_ops capture_ops =
 {
     .base.pin_query_accept = capture_query_accept,
-    .base.pfnGetMediaType = SmartTeeFilterCapture_GetMediaType,
+    .base.pin_get_media_type = capture_get_media_type,
     .pfnAttemptConnection = BaseOutputPinImpl_AttemptConnection,
     .pfnDecideAllocator = SmartTeeFilterCapture_DecideAllocator,
 };
@@ -437,7 +437,7 @@ static HRESULT preview_query_accept(struct strmbase_pin *base, const AM_MEDIA_TY
     return S_OK;
 }
 
-static HRESULT WINAPI SmartTeeFilterPreview_GetMediaType(struct strmbase_pin *base, int iPosition, AM_MEDIA_TYPE *amt)
+static HRESULT preview_get_media_type(struct strmbase_pin *base, int iPosition, AM_MEDIA_TYPE *amt)
 {
     SmartTeeFilter *This = impl_from_strmbase_pin(base);
     TRACE("(%p, %d, %p)\n", This, iPosition, amt);
@@ -461,7 +461,7 @@ static HRESULT WINAPI SmartTeeFilterPreview_DecideAllocator(struct strmbase_sour
 static const struct strmbase_source_ops preview_ops =
 {
     .base.pin_query_accept = preview_query_accept,
-    .base.pfnGetMediaType = SmartTeeFilterPreview_GetMediaType,
+    .base.pin_get_media_type = preview_get_media_type,
     .pfnAttemptConnection = BaseOutputPinImpl_AttemptConnection,
     .pfnDecideAllocator = SmartTeeFilterPreview_DecideAllocator,
 };
diff --git a/dlls/qcap/vfwcapture.c b/dlls/qcap/vfwcapture.c
index c84baa7abc6..551dad61f33 100644
--- a/dlls/qcap/vfwcapture.c
+++ b/dlls/qcap/vfwcapture.c
@@ -518,7 +518,7 @@ static HRESULT source_query_accept(struct strmbase_pin *pin, const AM_MEDIA_TYPE
     return qcap_driver_check_format(filter->driver_info, mt);
 }
 
-static HRESULT WINAPI VfwPin_GetMediaType(struct strmbase_pin *pin, int iPosition, AM_MEDIA_TYPE *pmt)
+static HRESULT source_get_media_type(struct strmbase_pin *pin, int iPosition, AM_MEDIA_TYPE *pmt)
 {
     VfwCapture *filter = impl_from_strmbase_pin(pin);
     AM_MEDIA_TYPE *vfw_pmt;
@@ -557,7 +557,7 @@ static HRESULT WINAPI VfwPin_DecideBufferSize(struct strmbase_source *iface,
 static const struct strmbase_source_ops source_ops =
 {
     .base.pin_query_accept = source_query_accept,
-    .base.pfnGetMediaType = VfwPin_GetMediaType,
+    .base.pin_get_media_type = source_get_media_type,
     .pfnAttemptConnection = BaseOutputPinImpl_AttemptConnection,
     .pfnDecideBufferSize = VfwPin_DecideBufferSize,
     .pfnDecideAllocator = BaseOutputPinImpl_DecideAllocator,
diff --git a/dlls/quartz/filesource.c b/dlls/quartz/filesource.c
index ac210824f07..031307e1839 100644
--- a/dlls/quartz/filesource.c
+++ b/dlls/quartz/filesource.c
@@ -591,7 +591,7 @@ static HRESULT source_query_accept(struct strmbase_pin *iface, const AM_MEDIA_TY
     return S_FALSE;
 }
 
-static HRESULT WINAPI FileAsyncReaderPin_GetMediaType(struct strmbase_pin *iface, int index, AM_MEDIA_TYPE *mt)
+static HRESULT source_get_media_type(struct strmbase_pin *iface, int index, AM_MEDIA_TYPE *mt)
 {
     AsyncReader *filter = impl_from_strmbase_pin(iface);
 
@@ -704,7 +704,7 @@ static HRESULT WINAPI FileAsyncReaderPin_DecideBufferSize(struct strmbase_source
 static const struct strmbase_source_ops source_ops =
 {
     .base.pin_query_accept = source_query_accept,
-    .base.pfnGetMediaType = FileAsyncReaderPin_GetMediaType,
+    .base.pin_get_media_type = source_get_media_type,
     .pfnAttemptConnection = FileAsyncReaderPin_AttemptConnection,
     .pfnDecideBufferSize = FileAsyncReaderPin_DecideBufferSize,
     .pfnDecideAllocator = BaseOutputPinImpl_DecideAllocator,
diff --git a/dlls/strmbase/mediatype.c b/dlls/strmbase/mediatype.c
index df8d5702933..931e00a5cba 100644
--- a/dlls/strmbase/mediatype.c
+++ b/dlls/strmbase/mediatype.c
@@ -169,7 +169,7 @@ static HRESULT WINAPI IEnumMediaTypesImpl_Next(IEnumMediaTypes *iface,
     for (i = 0; i < count && enummt->uIndex + i < enummt->count; i++)
     {
         if (!(mts[i] = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE)))
-                || FAILED(enummt->basePin->pFuncsTable->pfnGetMediaType(enummt->basePin, enummt->uIndex + i, mts[i])))
+                || FAILED(enummt->basePin->pFuncsTable->pin_get_media_type(enummt->basePin, enummt->uIndex + i, mts[i])))
         {
             while (i--)
                 DeleteMediaType(mts[i]);
@@ -206,7 +206,7 @@ static HRESULT WINAPI IEnumMediaTypesImpl_Reset(IEnumMediaTypes * iface)
     TRACE("(%p)->()\n", iface);
 
     i = 0;
-    while (This->basePin->pFuncsTable->pfnGetMediaType(This->basePin, i, &amt) == S_OK)
+    while (This->basePin->pFuncsTable->pin_get_media_type(This->basePin, i, &amt) == S_OK)
     {
         FreeMediaType(&amt);
         i++;
diff --git a/dlls/strmbase/pin.c b/dlls/strmbase/pin.c
index 3b05e5c62a1..4a7b3b20bfe 100644
--- a/dlls/strmbase/pin.c
+++ b/dlls/strmbase/pin.c
@@ -153,7 +153,7 @@ static BOOL CompareMediaTypes(const AM_MEDIA_TYPE * pmt1, const AM_MEDIA_TYPE *
 }
 
 /*** Common Base Pin function */
-HRESULT WINAPI BasePinImpl_GetMediaType(struct strmbase_pin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
+HRESULT strmbase_pin_get_media_type(struct strmbase_pin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
 {
     if (iPosition < 0)
         return E_INVALIDARG;
diff --git a/dlls/strmbase/renderer.c b/dlls/strmbase/renderer.c
index 6df54146568..c8a6249227c 100644
--- a/dlls/strmbase/renderer.c
+++ b/dlls/strmbase/renderer.c
@@ -226,7 +226,7 @@ static HRESULT WINAPI BaseRenderer_Receive(BaseInputPin *pin, IMediaSample *samp
 static const BaseInputPinFuncTable input_BaseInputFuncTable =
 {
     .base.pin_query_accept = sink_query_accept,
-    .base.pfnGetMediaType = BasePinImpl_GetMediaType,
+    .base.pin_get_media_type = strmbase_pin_get_media_type,
     .pfnReceive = BaseRenderer_Receive,
 };
 
diff --git a/dlls/strmbase/transform.c b/dlls/strmbase/transform.c
index 4bb9e7fa005..fc2f0b1d2d4 100644
--- a/dlls/strmbase/transform.c
+++ b/dlls/strmbase/transform.c
@@ -110,7 +110,7 @@ static HRESULT WINAPI TransformFilter_Output_DecideBufferSize(struct strmbase_so
     return pTransformFilter->pFuncsTable->pfnDecideBufferSize(pTransformFilter, pAlloc, ppropInputRequest);
 }
 
-static HRESULT WINAPI TransformFilter_Output_GetMediaType(struct strmbase_pin *This, int iPosition, AM_MEDIA_TYPE *pmt)
+static HRESULT source_get_media_type(struct strmbase_pin *This, int iPosition, AM_MEDIA_TYPE *pmt)
 {
     TransformFilter *pTransform = impl_from_source_IPin(&This->IPin_iface);
 
@@ -166,14 +166,14 @@ static const struct strmbase_filter_ops filter_ops =
 static const BaseInputPinFuncTable tf_input_BaseInputFuncTable =
 {
     .base.pin_query_accept = sink_query_accept,
-    .base.pfnGetMediaType = BasePinImpl_GetMediaType,
+    .base.pin_get_media_type = strmbase_pin_get_media_type,
     .pfnReceive = TransformFilter_Input_Receive,
 };
 
 static const struct strmbase_source_ops source_ops =
 {
     .base.pin_query_accept = source_query_accept,
-    .base.pfnGetMediaType = TransformFilter_Output_GetMediaType,
+    .base.pin_get_media_type = source_get_media_type,
     .pfnAttemptConnection = BaseOutputPinImpl_AttemptConnection,
     .pfnDecideBufferSize = TransformFilter_Output_DecideBufferSize,
     .pfnDecideAllocator = BaseOutputPinImpl_DecideAllocator,
diff --git a/dlls/winegstreamer/gstdemux.c b/dlls/winegstreamer/gstdemux.c
index 7b1080207ee..b9ff1fdc039 100644
--- a/dlls/winegstreamer/gstdemux.c
+++ b/dlls/winegstreamer/gstdemux.c
@@ -1250,7 +1250,7 @@ static HRESULT sink_query_accept(struct strmbase_pin *iface, const AM_MEDIA_TYPE
 static const BasePinFuncTable sink_ops =
 {
     .pin_query_accept = sink_query_accept,
-    .pfnGetMediaType = BasePinImpl_GetMediaType,
+    .pin_get_media_type = strmbase_pin_get_media_type,
 };
 
 static BOOL gstdecoder_init_gst(struct gstdemux *filter)
@@ -1799,7 +1799,7 @@ static HRESULT source_query_accept(struct strmbase_pin *base, const AM_MEDIA_TYP
     return S_OK;
 }
 
-static HRESULT WINAPI GSTOutPin_GetMediaType(struct strmbase_pin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
+static HRESULT source_get_media_type(struct strmbase_pin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
 {
     struct gstdemux_source *This = impl_source_from_IPin(&iface->IPin_iface);
 
@@ -1907,7 +1907,7 @@ static const IPinVtbl GST_OutputPin_Vtbl = {
 static const struct strmbase_source_ops source_ops =
 {
     .base.pin_query_accept = source_query_accept,
-    .base.pfnGetMediaType = GSTOutPin_GetMediaType,
+    .base.pin_get_media_type = source_get_media_type,
     .pfnAttemptConnection = BaseOutputPinImpl_AttemptConnection,
     .pfnDecideBufferSize = GSTOutPin_DecideBufferSize,
     .pfnDecideAllocator = GSTOutPin_DecideAllocator,
@@ -2316,7 +2316,7 @@ static HRESULT wave_parser_sink_query_accept(struct strmbase_pin *iface, const A
 static const BasePinFuncTable wave_parser_sink_ops =
 {
     .pin_query_accept = wave_parser_sink_query_accept,
-    .pfnGetMediaType = BasePinImpl_GetMediaType,
+    .pin_get_media_type = strmbase_pin_get_media_type,
 };
 
 static BOOL wave_parser_init_gst(struct gstdemux *filter)
@@ -2422,7 +2422,7 @@ static HRESULT avi_splitter_sink_query_accept(struct strmbase_pin *iface, const
 static const BasePinFuncTable avi_splitter_sink_ops =
 {
     .pin_query_accept = avi_splitter_sink_query_accept,
-    .pfnGetMediaType = BasePinImpl_GetMediaType,
+    .pin_get_media_type = strmbase_pin_get_media_type,
 };
 
 static BOOL avi_splitter_init_gst(struct gstdemux *filter)
@@ -2534,7 +2534,7 @@ static HRESULT mpeg_splitter_sink_query_accept(struct strmbase_pin *iface, const
 static const BasePinFuncTable mpeg_splitter_sink_ops =
 {
     .pin_query_accept = mpeg_splitter_sink_query_accept,
-    .pfnGetMediaType = BasePinImpl_GetMediaType,
+    .pin_get_media_type = strmbase_pin_get_media_type,
 };
 
 static BOOL mpeg_splitter_init_gst(struct gstdemux *filter)
diff --git a/dlls/wineqtdecoder/qtsplitter.c b/dlls/wineqtdecoder/qtsplitter.c
index 371c0f1ddaf..17d22b4d8da 100644
--- a/dlls/wineqtdecoder/qtsplitter.c
+++ b/dlls/wineqtdecoder/qtsplitter.c
@@ -305,7 +305,7 @@ static HRESULT sink_query_accept(struct strmbase_pin *iface, const AM_MEDIA_TYPE
 static const BasePinFuncTable sink_ops =
 {
     .pin_query_accept = sink_query_accept,
-    .pfnGetMediaType = BasePinImpl_GetMediaType,
+    .pin_get_media_type = strmbase_pin_get_media_type,
 };
 
 IUnknown * CALLBACK QTSplitter_create(IUnknown *outer, HRESULT *phr)
@@ -1295,7 +1295,7 @@ static HRESULT source_query_accept(struct strmbase_pin *base, const AM_MEDIA_TYP
     return S_OK;
 }
 
-static HRESULT WINAPI QTOutPin_GetMediaType(struct strmbase_pin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
+static HRESULT source_get_media_type(struct strmbase_pin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
 {
     QTOutPin *This = impl_sink_from_strmbase_pin(iface);
 
@@ -1407,7 +1407,7 @@ static const IQualityControlVtbl QTOutPin_QualityControl_Vtbl = {
 static const struct strmbase_source_ops source_ops =
 {
     .base.pin_query_accept = source_query_accept,
-    .base.pfnGetMediaType = QTOutPin_GetMediaType,
+    .base.pin_get_media_type = source_get_media_type,
     .pfnAttemptConnection = BaseOutputPinImpl_AttemptConnection,
     .pfnDecideBufferSize = QTOutPin_DecideBufferSize,
     .pfnDecideAllocator = QTOutPin_DecideAllocator,
diff --git a/include/wine/strmbase.h b/include/wine/strmbase.h
index cd9448775e6..fc18b22d6d3 100644
--- a/include/wine/strmbase.h
+++ b/include/wine/strmbase.h
@@ -42,14 +42,11 @@ struct strmbase_pin
     const struct BasePinFuncTable* pFuncsTable;
 };
 
-typedef LONG (WINAPI *BasePin_GetMediaTypeVersion)(struct strmbase_pin *pin);
-typedef HRESULT (WINAPI *BasePin_GetMediaType)(struct strmbase_pin *pin, int index, AM_MEDIA_TYPE *mt);
-
 typedef struct BasePinFuncTable {
     /* Required for QueryAccept(), Connect(), ReceiveConnection(). */
     HRESULT (*pin_query_accept)(struct strmbase_pin *pin, const AM_MEDIA_TYPE *mt);
     /* Required for EnumMediaTypes(). */
-    BasePin_GetMediaType pfnGetMediaType;
+    HRESULT (*pin_get_media_type)(struct strmbase_pin *pin, int index, AM_MEDIA_TYPE *mt);
 } BasePinFuncTable;
 
 struct strmbase_source
@@ -98,7 +95,7 @@ typedef struct BaseInputPinFuncTable {
 } BaseInputPinFuncTable;
 
 /* Base Pin */
-HRESULT WINAPI BasePinImpl_GetMediaType(struct strmbase_pin *pin, int index, AM_MEDIA_TYPE *mt);
+HRESULT strmbase_pin_get_media_type(struct strmbase_pin *pin, int index, AM_MEDIA_TYPE *mt);
 LONG WINAPI BasePinImpl_GetMediaTypeVersion(struct strmbase_pin *pin);
 ULONG WINAPI BasePinImpl_AddRef(IPin *iface);
 ULONG WINAPI BasePinImpl_Release(IPin *iface);