GstCaps *
gst_dshowvideosrc_getcaps_from_capture_filter (IBaseFilter * filter,
GList ** pins_mediatypes)
{
IPin *capture_pin = NULL;
IEnumPins *enumpins = NULL;
HRESULT hres;
GstCaps *caps;
g_assert (filter);
caps = gst_caps_new_empty ();
/* get the capture pins supported types */
hres = filter->EnumPins (&enumpins);
if (SUCCEEDED (hres)) {
while (enumpins->Next (1, &capture_pin, NULL) == S_OK) {
IKsPropertySet *pKs = NULL;
hres =
capture_pin->QueryInterface (IID_IKsPropertySet, (LPVOID *) & pKs);
if (SUCCEEDED (hres) && pKs) {
DWORD cbReturned;
GUID pin_category;
RPC_STATUS rpcstatus;
hres =
pKs->Get (AMPROPSETID_Pin,
AMPROPERTY_PIN_CATEGORY, NULL, 0, &pin_category, sizeof (GUID),
&cbReturned);
/* we only want capture pins */
if (UuidCompare (&pin_category, (UUID *) & PIN_CATEGORY_CAPTURE,
&rpcstatus) == 0) {
GstCaps *caps2;
caps2 = gst_dshowvideosrc_getcaps_from_streamcaps (capture_pin,
pins_mediatypes);
if (caps2) {
gst_caps_append (caps, caps2);
} else {
caps2 = gst_dshowvideosrc_getcaps_from_enum_mediatypes (
capture_pin, pins_mediatypes);
if (caps2) {
gst_caps_append (caps, caps2);
}
}
}
pKs->Release ();
}
capture_pin->Release ();
}
enumpins->Release ();
}
GST_DEBUG ("Device supports these caps: %" GST_PTR_FORMAT, caps);
return caps;
}
static GstCaps *
gst_dshowvideosrc_get_caps (GstBaseSrc * basesrc, GstCaps *filter)
{
HRESULT hres = S_OK;
IBindCtx *lpbc = NULL;
IMoniker *videom;
DWORD dwEaten;
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (basesrc);
gunichar2 *unidevice = NULL;
if (src->caps) {
return gst_caps_ref (src->caps);
}
if (!src->device) {
src->device =
gst_dshow_getdevice_from_devicename (&CLSID_VideoInputDeviceCategory,
&src->device_name);
if (!src->device) {
GST_ERROR ("No video device found.");
return NULL;
}
}
unidevice =
g_utf8_to_utf16 (src->device, strlen (src->device), NULL, NULL, NULL);
if (!src->video_cap_filter) {
hres = CreateBindCtx (0, &lpbc);
if (SUCCEEDED (hres)) {
hres =
MkParseDisplayName (lpbc, (LPCOLESTR) unidevice, &dwEaten, &videom);
if (SUCCEEDED (hres)) {
hres = videom->BindToObject (lpbc, NULL, IID_IBaseFilter,
(LPVOID *) & src->video_cap_filter);
videom->Release ();
}
lpbc->Release ();
}
}
if (!src->caps) {
src->caps = gst_caps_new_empty ();
}
if (src->video_cap_filter && gst_caps_is_empty (src->caps)) {
/* get the capture pins supported types */
IPin *capture_pin = NULL;
IEnumPins *enumpins = NULL;
HRESULT hres;
hres = src->video_cap_filter->EnumPins (&enumpins);
if (SUCCEEDED (hres)) {
while (enumpins->Next (1, &capture_pin, NULL) == S_OK) {
IKsPropertySet *pKs = NULL;
hres =
capture_pin->QueryInterface (IID_IKsPropertySet, (LPVOID *) & pKs);
if (SUCCEEDED (hres) && pKs) {
DWORD cbReturned;
GUID pin_category;
RPC_STATUS rpcstatus;
hres =
pKs->Get (AMPROPSETID_Pin,
AMPROPERTY_PIN_CATEGORY, NULL, 0, &pin_category, sizeof (GUID),
&cbReturned);
/* we only want capture pins */
if (UuidCompare (&pin_category, (UUID *) & PIN_CATEGORY_CAPTURE,
&rpcstatus) == 0) {
{
GstCaps *caps =
gst_dshowvideosrc_getcaps_from_streamcaps (src, capture_pin);
if (caps) {
gst_caps_append (src->caps, caps);
} else {
caps = gst_dshowvideosrc_getcaps_from_enum_mediatypes (src, capture_pin);
if (caps)
gst_caps_append (src->caps, caps);
}
}
}
pKs->Release ();
}
capture_pin->Release ();
}
enumpins->Release ();
}
}
if (unidevice) {
g_free (unidevice);
}
if (src->caps) {
if (filter) {
return gst_caps_intersect_full (filter, src->caps,
GST_CAPS_INTERSECT_FIRST);
} else {
return gst_caps_ref (src->caps);
}
}
return NULL;
}
