C++ (Cpp) gst_dshow_new_pin_mediatype_from_enum_mediatypes Examples

Example #1

File: gstdshowvideosrc.cpp Project: hyperlobic/gst-plugins-bad

static GstCaps *
gst_dshowvideosrc_getcaps_from_enum_mediatypes (GstDshowVideoSrc * src, IPin * pin)
{
    GstCaps *caps = NULL;
    IEnumMediaTypes *enum_mediatypes = NULL;
    HRESULT hres = S_OK;
    GstCapturePinMediaType *pin_mediatype = NULL;

    hres = pin->EnumMediaTypes (&enum_mediatypes);
    if (FAILED (hres)) {
        GST_ERROR ("Failed to retrieve IEnumMediaTypes (error=0x%x)", hres);
        return NULL;
    }

    caps = gst_caps_new_empty ();

    while ((pin_mediatype = gst_dshow_new_pin_mediatype_from_enum_mediatypes (pin, enum_mediatypes)) != NULL) {

        GstCaps *mediacaps = NULL;
        GstVideoFormat video_format = gst_dshow_guid_to_gst_video_format (pin_mediatype->mediatype);
        GstVideoInfo info;

        gst_video_info_init(&info);
        gst_video_info_set_format(&info, video_format, pin_mediatype->defaultWidth, pin_mediatype->defaultHeight);
        info.fps_n = pin_mediatype->defaultFPS;
        info.fps_d = 1;
        info.par_n = 1;
        info.par_d = 1;

        if(video_format == GST_VIDEO_FORMAT_ENCODED) {
            if(gst_dshow_check_mediatype(pin_mediatype->mediatype, MEDIASUBTYPE_MJPG, FORMAT_VideoInfo)) {
                mediacaps = gst_caps_new_simple("image/jpeg", "width", G_TYPE_INT, info.width,
                                                "height", G_TYPE_INT, info.height,
                                                "framerate", GST_TYPE_FRACTION, info.fps_n, info.fps_d);
            }
        }
        else if (video_format != GST_VIDEO_FORMAT_UNKNOWN)
            mediacaps = gst_video_info_to_caps (&info);

        if (mediacaps) {
            src->pins_mediatypes =
                g_list_append (src->pins_mediatypes, pin_mediatype);
            gst_caps_append (caps, mediacaps);
        } else {
            /* failed to convert dshow caps */
            gst_dshow_free_pin_mediatype (pin_mediatype);
        }
    }

    enum_mediatypes->Release ();

    if (caps && gst_caps_is_empty (caps)) {
        gst_caps_unref (caps);
        caps = NULL;
    }

    return caps;
}

Example #2

File: gstdshowvideosrc.cpp Project: MaZderMind/gst-plugins-bad

GstCaps *
gst_dshowvideosrc_getcaps_from_enum_mediatypes (IPin * pin, GList ** pins_mediatypes)
{
  GstCaps *caps = NULL;
  IEnumMediaTypes *enum_mediatypes = NULL;
  HRESULT hres = S_OK;
  GstCapturePinMediaType *pin_mediatype = NULL;

  hres = pin->EnumMediaTypes (&enum_mediatypes);
  if (FAILED (hres)) {
    GST_ERROR ("Failed to retrieve IEnumMediaTypes (error=0x%x)", hres);
    return NULL;
  }

  caps = gst_caps_new_empty ();

  while ((pin_mediatype = gst_dshow_new_pin_mediatype_from_enum_mediatypes (pin, enum_mediatypes)) != NULL) {

    GstCaps *mediacaps = NULL;
    GstVideoFormat video_format = gst_dshow_guid_to_gst_video_format (pin_mediatype->mediatype);

	if (video_format != GST_VIDEO_FORMAT_UNKNOWN) {
		GstVideoInfo info;

		gst_video_info_init(&info);
		gst_video_info_set_format(&info, video_format, pin_mediatype->defaultWidth, pin_mediatype->defaultHeight);
		info.fps_n = pin_mediatype->defaultFPS;
		info.fps_d = 1;
		info.par_n = 1;
		info.par_d = 1;
		info.interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE; /* XXX is this correct ? */
		mediacaps = gst_video_info_to_caps(&info);
	}

    if (mediacaps) {
      if (pins_mediatypes != NULL) {
        *pins_mediatypes = g_list_append (*pins_mediatypes, pin_mediatype);
      }
      gst_caps_append (caps, mediacaps);
    } else {
      /* failed to convert dshow caps */
      gst_dshow_free_pin_mediatype (pin_mediatype);
    }
  }

  enum_mediatypes->Release ();

  if (caps && gst_caps_is_empty (caps)) {
    gst_caps_unref (caps);
    caps = NULL;
  }

  return caps;
}

Example #3

File: gstdshowvideosrc.cpp Project: collects/gst-plugins-bad

static GstCaps *
gst_dshowvideosrc_getcaps_from_enum_mediatypes (GstDshowVideoSrc * src, IPin * pin)
{
  GstCaps *caps = NULL;
  IEnumMediaTypes *enum_mediatypes = NULL;
  HRESULT hres = S_OK;
  GstCapturePinMediaType *pin_mediatype = NULL;

  hres = pin->EnumMediaTypes (&enum_mediatypes);
  if (FAILED (hres)) {
    GST_ERROR ("Failed to retrieve IEnumMediaTypes (error=0x%x)", hres);
    return NULL;
  }

  caps = gst_caps_new_empty ();

  while ((pin_mediatype = gst_dshow_new_pin_mediatype_from_enum_mediatypes (pin, enum_mediatypes)) != NULL) {

    GstCaps *mediacaps = NULL;
    GstVideoFormat video_format = gst_dshow_guid_to_gst_video_format (pin_mediatype->mediatype);

    if (video_format != GST_VIDEO_FORMAT_UNKNOWN)
      mediacaps = gst_video_format_new_caps (video_format, 
          pin_mediatype->defaultWidth, pin_mediatype->defaultHeight,
          pin_mediatype->defaultFPS, 1, 1, 1);

    if (mediacaps) {
      src->pins_mediatypes =
          g_list_append (src->pins_mediatypes, pin_mediatype);
      gst_caps_append (caps, mediacaps);
    } else {
      /* failed to convert dshow caps */
      gst_dshow_free_pin_mediatype (pin_mediatype);
    }
  }

  enum_mediatypes->Release ();

  if (caps && gst_caps_is_empty (caps)) {
    gst_caps_unref (caps);
    caps = NULL;
  }

  return caps;
}