static gboolean gst_dshowvideodec_get_filter_output_format (GstDshowVideoDec * vdec, GUID * subtype, VIDEOINFOHEADER ** format, guint * size) { IPin *output_pin = NULL; IEnumMediaTypes *enum_mediatypes = NULL; HRESULT hres; ULONG fetched; BOOL ret = FALSE; if (!vdec->decfilter) return FALSE; if (!gst_dshow_get_pin_from_filter (vdec->decfilter, PINDIR_OUTPUT, &output_pin)) { GST_ELEMENT_ERROR (vdec, CORE, NEGOTIATION, ("failed getting ouput pin from the decoder"), (NULL)); return FALSE; } hres = IPin_EnumMediaTypes (output_pin, &enum_mediatypes); if (hres == S_OK && enum_mediatypes) { AM_MEDIA_TYPE *mediatype = NULL; IEnumMediaTypes_Reset (enum_mediatypes); while (hres = IEnumMoniker_Next (enum_mediatypes, 1, &mediatype, &fetched), hres == S_OK) { RPC_STATUS rpcstatus; if ((UuidCompare (&mediatype->subtype, subtype, &rpcstatus) == 0 && rpcstatus == RPC_S_OK) && (UuidCompare (&mediatype->formattype, &FORMAT_VideoInfo, &rpcstatus) == 0 && rpcstatus == RPC_S_OK)) { *size = mediatype->cbFormat; *format = g_malloc0 (*size); memcpy (*format, mediatype->pbFormat, *size); ret = TRUE; } gst_dshow_free_mediatype (mediatype); if (ret) break; } IEnumMediaTypes_Release (enum_mediatypes); } if (output_pin) { IPin_Release (output_pin); } return ret; }
void gst_dshow_free_pin_mediatype (gpointer pt) { GstCapturePinMediaType *pin_mediatype = (GstCapturePinMediaType *) pt; if (pin_mediatype) { if (pin_mediatype->capture_pin) { pin_mediatype->capture_pin->Release (); pin_mediatype->capture_pin = NULL; } if (pin_mediatype->mediatype) { gst_dshow_free_mediatype (pin_mediatype->mediatype); pin_mediatype->mediatype = NULL; } } }
static GstCaps * gst_dshowvideodec_src_getcaps (GstPad * pad) { GstDshowVideoDec *vdec = (GstDshowVideoDec *) gst_pad_get_parent (pad); GstCaps *caps = NULL; if (!vdec->srccaps) vdec->srccaps = gst_caps_new_empty (); if (vdec->decfilter) { IPin *output_pin = NULL; IEnumMediaTypes *enum_mediatypes = NULL; HRESULT hres; ULONG fetched; if (!gst_dshow_get_pin_from_filter (vdec->decfilter, PINDIR_OUTPUT, &output_pin)) { GST_ELEMENT_ERROR (vdec, STREAM, FAILED, ("failed getting ouput pin from the decoder"), (NULL)); goto beach; } hres = IPin_EnumMediaTypes (output_pin, &enum_mediatypes); if (hres == S_OK && enum_mediatypes) { AM_MEDIA_TYPE *mediatype = NULL; IEnumMediaTypes_Reset (enum_mediatypes); while (hres = IEnumMoniker_Next (enum_mediatypes, 1, &mediatype, &fetched), hres == S_OK) { RPC_STATUS rpcstatus; VIDEOINFOHEADER *video_info; GstCaps *mediacaps = NULL; /* RGB24 */ if ((UuidCompare (&mediatype->subtype, &MEDIASUBTYPE_RGB24, &rpcstatus) == 0 && rpcstatus == RPC_S_OK) && (UuidCompare (&mediatype->formattype, &FORMAT_VideoInfo, &rpcstatus) == 0 && rpcstatus == RPC_S_OK)) { video_info = (VIDEOINFOHEADER *) mediatype->pbFormat; /* ffmpegcolorspace handles RGB24 in BIG_ENDIAN */ mediacaps = gst_caps_new_simple ("video/x-raw-rgb", "bpp", G_TYPE_INT, 24, "depth", G_TYPE_INT, 24, "width", G_TYPE_INT, video_info->bmiHeader.biWidth, "height", G_TYPE_INT, video_info->bmiHeader.biHeight, "framerate", GST_TYPE_FRACTION, (int) (10000000 / video_info->AvgTimePerFrame), 1, "endianness", G_TYPE_INT, G_BIG_ENDIAN, "red_mask", G_TYPE_INT, 255, "green_mask", G_TYPE_INT, 65280, "blue_mask", G_TYPE_INT, 16711680, NULL); if (mediacaps) { vdec->mediatypes = g_list_append (vdec->mediatypes, mediatype); gst_caps_append (vdec->srccaps, mediacaps); } else { gst_dshow_free_mediatype (mediatype); } } else { gst_dshow_free_mediatype (mediatype); } } IEnumMediaTypes_Release (enum_mediatypes); } if (output_pin) { IPin_Release (output_pin); } } if (vdec->srccaps) caps = gst_caps_ref (vdec->srccaps); beach: gst_object_unref (vdec); return caps; }