mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-24 01:00:37 +00:00
Code Issues 1 Projects Releases Wiki Activity

dshowsrcwrapper: Added Graph Builder and Capture Builder to correctly create upstream needed filters by Analog TV Capture Devices.

Browse source
This commit is contained in:
Fabricio Costa Alisedo 2011-08-10 12:13:34 +00:00 committed by Sebastian Dröge
parent d4c3fd8a7e
commit d7c6d240b5
2 changed files with 107 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

110
sys/dshowsrcwrapper/gstdshowvideosrc.cpp
View file

@ -199,6 +199,12 @@ gst_dshowvideosrc_init (GstDshowVideoSrc * src, GstDshowVideoSrcClass * klass)
src->pins_mediatypes = NULL;
src->is_rgb = FALSE;
/*added for analog input*/
src->graph_builder = NULL;
src->capture_builder = NULL;
src->pVC = NULL;
src->pVSC = NULL;
src->buffer_cond = g_cond_new ();
src->buffer_mutex = g_mutex_new ();
src->buffer = NULL;
@ -610,14 +616,37 @@ gst_dshowvideosrc_start (GstBaseSrc * bsrc)
{
HRESULT hres = S_FALSE;
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (bsrc);
/*
The filter graph now is created via the IGraphBuilder Interface
Code added to build upstream filters, needed for USB Analog TV Tuners / DVD Maker, based on AMCap code.
by Fabrice Costa <fabricio.costa@moldeointeractive.com.ar>
*/
hres = CoCreateInstance (CLSID_FilterGraph, NULL, CLSCTX_INPROC,
IID_IFilterGraph, (LPVOID *) & src->filter_graph);
if (hres != S_OK || !src->filter_graph) {
hres = CoCreateInstance(CLSID_FilterGraph, NULL,
CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (LPVOID *) & src->graph_builder );
if (hres != S_OK || !src->graph_builder ) {
GST_ERROR
("Can't create an instance of the dshow graph manager (error=0x%x)",
("Can't create an instance of the dshow graph builder (error=0x%x)",
hres);
goto error;
} else {
/*graph builder is derived from IFilterGraph so we can assign it to the old src->filter_graph*/
src->filter_graph = (IFilterGraph*) src->graph_builder;
}
/*adding capture graph builder to correctly create upstream filters, Analog TV, TV Tuner */
hres = CoCreateInstance(CLSID_CaptureGraphBuilder2, NULL,
CLSCTX_INPROC_SERVER, IID_ICaptureGraphBuilder2,
(LPVOID *) & src->capture_builder);
if ( hres != S_OK || !src->capture_builder ) {
GST_ERROR
("Can't create an instance of the dshow capture graph builder manager (error=0x%x)",
hres);
goto error;
} else {
src->capture_builder->SetFiltergraph(src->graph_builder);
}
hres = src->filter_graph->QueryInterface (IID_IMediaFilter,
@ -639,6 +668,34 @@ gst_dshowvideosrc_start (GstBaseSrc * bsrc)
goto error;
}
/* Finding interfaces really creates the upstream filters */
hres = src->capture_builder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved, src->video_cap_filter,
IID_IAMVideoCompression, (LPVOID *)&src->pVC);
if(hres != S_OK)
{
hres = src->capture_builder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, src->video_cap_filter,
IID_IAMVideoCompression, (LPVOID *)&src->pVC);
}
hres = src->capture_builder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved,
src->video_cap_filter, IID_IAMStreamConfig, (LPVOID *)&src->pVSC);
if(hres != S_OK)
{
hres = src->capture_builder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, src->video_cap_filter,
IID_IAMStreamConfig, (LPVOID *)&src->pVSC);
if (hres != S_OK) {
// this means we can't set frame rate (non-DV only)
GST_ERROR ("Error %x: Cannot find VCapture:IAMStreamConfig", hres);
goto error;
}
}
hres = src->filter_graph->AddFilter (src->dshow_fakesink, L"sink");
if (hres != S_OK) {
GST_ERROR ("Can't add our fakesink filter to the graph (error=0x%x)", hres);
@ -657,9 +714,21 @@ error:
src->media_filter->Release ();
src->media_filter = NULL;
}
if (src->filter_graph) {
src->filter_graph->Release ();
src->filter_graph = NULL;
if (src->graph_builder) {
src->graph_builder->Release ();
src->graph_builder = NULL;
}
if (src->capture_builder) {
src->capture_builder->Release ();
src->capture_builder = NULL;
}
if (src->pVC) {
src->pVC->Release ();
src->pVC = NULL;
}
if (src->pVSC) {
src->pVSC->Release ();
src->pVSC = NULL;
}
return FALSE;
@ -739,6 +808,7 @@ gst_dshowvideosrc_set_caps (GstBaseSrc * bsrc, GstCaps * caps)
goto error;
}
hres = src->filter_graph->ConnectDirect (pin_mediatype->capture_pin,
input_pin, pin_mediatype->mediatype);
input_pin->Release ();
@ -810,9 +880,29 @@ gst_dshowvideosrc_stop (GstBaseSrc * bsrc)
src->media_filter->Release ();
src->media_filter = NULL;
/* release the filter graph manager */
src->filter_graph->Release ();
src->filter_graph = NULL;
/* release any upstream filter */
if (src->pVC) {
src->pVC->Release ();
src->pVC = NULL;
}
if (src->pVSC) {
src->pVSC->Release ();
src->pVSC = NULL;
}
/* release the graph builder */
if (src->graph_builder) {
src->graph_builder->Release ();
src->graph_builder = NULL;
src->filter_graph = NULL;
}
/* release the capture builder */
if (src->capture_builder) {
src->capture_builder->Release ();
src->capture_builder = NULL;
}
/* reset caps */
if (src->caps) {

7
sys/dshowsrcwrapper/gstdshowvideosrc.h
View file

@ -72,6 +72,13 @@ struct _GstDshowVideoSrc
IMediaFilter *media_filter;
IFilterGraph *filter_graph;
IGraphBuilder *graph_builder;
ICaptureGraphBuilder2 *capture_builder;
IAMVideoCompression *pVC;
//IAMVfwCaptureDialogs *pDlg;
//IAMStreamConfig *pASC; // for audio cap
IAMStreamConfig *pVSC; // for video cap
/* the last buffer from DirectShow */
GCond *buffer_cond;
GMutex *buffer_mutex;