Esempi in C++ (Cpp) per gst_vdp_video_to_output_caps

Esempio n. 1

File: gstvdpvideopostprocess.c Progetto: zsx/ossbuild

static gboolean
gst_vdp_vpp_sink_setcaps (GstPad * pad, GstCaps * caps)
{
  GstVdpVideoPostProcess *vpp =
      GST_VDP_VIDEO_POST_PROCESS (gst_pad_get_parent (pad));
  GstStructure *structure;
  GstCaps *output_caps, *allowed_caps, *src_caps;
  gboolean res;

  /* extract interlaced flag */
  structure = gst_caps_get_structure (caps, 0);
  gst_structure_get_boolean (structure, "interlaced", &vpp->interlaced);

  allowed_caps = gst_pad_get_allowed_caps (vpp->srcpad);
  structure = gst_caps_get_structure (allowed_caps, 0);
  output_caps = gst_vdp_video_to_output_caps (caps);

  src_caps = gst_caps_intersect (output_caps, allowed_caps);
  gst_caps_truncate (src_caps);
  if (gst_caps_is_empty (src_caps))
    goto invalid_caps;

  GST_DEBUG ("output_caps: %" GST_PTR_FORMAT " allowed_caps: %" GST_PTR_FORMAT
      " src_caps: %" GST_PTR_FORMAT, output_caps, allowed_caps, src_caps);

  gst_caps_unref (output_caps);
  gst_caps_unref (allowed_caps);

  if (gst_vdp_vpp_is_interlaced (vpp)) {
    gint fps_n, fps_d;

    structure = gst_caps_get_structure (src_caps, 0);

    if (!gst_structure_get_fraction (structure, "framerate", &fps_n, &fps_d)) {
      gst_caps_unref (src_caps);
      goto invalid_caps;
    }

    gst_fraction_double (&fps_n, &fps_d);
    gst_structure_set (structure, "framerate", GST_TYPE_FRACTION, fps_n, fps_d,
        NULL);
    gst_structure_remove_field (structure, "interlaced");

    vpp->field_duration = gst_util_uint64_scale (GST_SECOND, fps_d, fps_n);
  }

  res = gst_pad_set_caps (vpp->srcpad, src_caps);

done:
  gst_object_unref (vpp);
  return res;

invalid_caps:
  GST_ERROR_OBJECT (vpp, "invalid caps: %" GST_PTR_FORMAT, caps);
  res = FALSE;
  goto done;
}

Esempio n. 2

File: gstvdpvideopostprocess.c Progetto: lubing521/gst-embedded-builder

static gboolean
gst_vdp_vpp_sink_setcaps (GstPad * pad, GstCaps * caps)
{
  GstVdpVideoPostProcess *vpp =
      GST_VDP_VIDEO_POST_PROCESS (gst_pad_get_parent (pad));
  GstStructure *structure;
  GstCaps *video_caps = NULL;
  gboolean res = FALSE;

  GstCaps *allowed_caps, *output_caps, *src_caps;

  /* check if the input is non native */
  structure = gst_caps_get_structure (caps, 0);
  if (gst_structure_has_name (structure, "video/x-raw-yuv")) {
    if (!gst_structure_get_fourcc (structure, "format", &vpp->fourcc))
      goto done;
    vpp->native_input = FALSE;
    video_caps = gst_vdp_yuv_to_video_caps (caps);
    if (!video_caps)
      goto done;

    if (!vpp->vpool)
      vpp->vpool = gst_vdp_video_buffer_pool_new (vpp->device);

    gst_vdp_buffer_pool_set_caps (vpp->vpool, video_caps);

  } else {
    vpp->native_input = TRUE;
    video_caps = gst_caps_ref (caps);

    if (vpp->vpool) {
      g_object_unref (vpp->vpool);
      vpp->vpool = NULL;
    }
  }

  structure = gst_caps_get_structure (video_caps, 0);
  if (!gst_structure_get_int (structure, "width", &vpp->width) ||
      !gst_structure_get_int (structure, "height", &vpp->height) ||
      !gst_structure_get_int (structure, "chroma-type",
          (gint *) & vpp->chroma_type))
    goto done;


  /* get interlaced flag */
  gst_structure_get_boolean (structure, "interlaced", &vpp->interlaced);

  /* extract par */
  if (gst_structure_has_field_typed (structure, "pixel-aspect-ratio",
          GST_TYPE_FRACTION)) {
    gst_structure_get_fraction (structure, "pixel-aspect-ratio", &vpp->par_n,
        &vpp->par_d);
    vpp->got_par = TRUE;
  } else
    vpp->got_par = FALSE;

  allowed_caps = gst_pad_get_allowed_caps (vpp->srcpad);
  if (G_UNLIKELY (!allowed_caps))
    goto null_allowed_caps;
  if (G_UNLIKELY (gst_caps_is_empty (allowed_caps)))
    goto empty_allowed_caps;
  GST_DEBUG ("allowed_caps: %" GST_PTR_FORMAT, allowed_caps);

  output_caps = gst_vdp_video_to_output_caps (video_caps);
  src_caps = gst_caps_intersect (output_caps, allowed_caps);
  gst_caps_unref (allowed_caps);
  gst_caps_unref (output_caps);

  if (gst_caps_is_empty (src_caps))
    goto not_negotiated;

  gst_pad_fixate_caps (vpp->srcpad, src_caps);


  if (gst_vdp_vpp_is_interlaced (vpp)) {
    gint fps_n, fps_d;

    if (gst_structure_get_fraction (structure, "framerate", &fps_n, &fps_d)) {
      gst_fraction_double (&fps_n, &fps_d);
      gst_caps_set_simple (src_caps, "framerate", GST_TYPE_FRACTION, fps_n,
          fps_d, NULL);
      vpp->field_duration = gst_util_uint64_scale (GST_SECOND, fps_d, fps_n);
    }

    gst_caps_set_simple (src_caps, "interlaced", G_TYPE_BOOLEAN, FALSE, NULL);
  }

  GST_DEBUG ("src_caps: %" GST_PTR_FORMAT, src_caps);

  res = gst_pad_set_caps (vpp->srcpad, src_caps);
  gst_caps_unref (src_caps);

done:
  gst_object_unref (vpp);
  if (video_caps)
    gst_caps_unref (video_caps);

  return res;

null_allowed_caps:
  GST_ERROR_OBJECT (vpp, "Got null from gst_pad_get_allowed_caps");
  goto done;

empty_allowed_caps:
  GST_ERROR_OBJECT (vpp, "Got EMPTY caps from gst_pad_get_allowed_caps");

  gst_caps_unref (allowed_caps);
  goto done;

not_negotiated:
  gst_caps_unref (src_caps);
  GST_ERROR_OBJECT (vpp, "Couldn't find suitable output format");
  goto done;
}