C++ (Cpp) gst_vaapi_video_meta_get_display示例

示例#1

文件： gstvaapivideobuffer.c 项目： GStreamer/gstreamer-vaapi

static GstBuffer *
new_vbuffer (GstVaapiVideoMeta * meta)
{
  GstBuffer *buffer;

  g_return_val_if_fail (meta != NULL, NULL);

  gst_vaapi_video_meta_set_surface_converter (meta,
      get_surface_converter (gst_vaapi_video_meta_get_display (meta)));

  buffer = gst_surface_buffer_new ();
  if (buffer)
    gst_buffer_set_vaapi_video_meta (buffer, meta);
  gst_vaapi_video_meta_unref (meta);
  return buffer;
}

示例#2

文件： gstvaapivideomemory.c 项目： DarkLighters/gstreamer-vaapi

GstMemory *
gst_vaapi_dmabuf_memory_new (GstAllocator * allocator, GstVaapiVideoMeta * meta)
{
  GstMemory *mem;
  GstVaapiDisplay *display;
  GstVaapiSurface *surface;
  GstVaapiSurfaceProxy *proxy;
  GstVaapiBufferProxy *dmabuf_proxy;
  gint dmabuf_fd;
  const GstVideoInfo *vip;
  guint flags;

  g_return_val_if_fail (allocator != NULL, NULL);
  g_return_val_if_fail (meta != NULL, NULL);

  vip = gst_allocator_get_vaapi_video_info (allocator, &flags);
  if (!vip)
    return NULL;

  display = gst_vaapi_video_meta_get_display (meta);
  if (!meta)
    return NULL;

  surface = gst_vaapi_surface_new_full (display, vip, flags);
  if (!surface)
    goto error_create_surface;

  proxy = gst_vaapi_surface_proxy_new (surface);
  if (!proxy)
    goto error_create_surface_proxy;

  dmabuf_proxy = gst_vaapi_surface_get_dma_buf_handle (surface);
  gst_vaapi_object_unref (surface);
  if (!dmabuf_proxy)
    goto error_create_dmabuf_proxy;

  gst_vaapi_video_meta_set_surface_proxy (meta, proxy);
  gst_vaapi_surface_proxy_unref (proxy);

  dmabuf_fd = gst_vaapi_buffer_proxy_get_handle (dmabuf_proxy);
  if (dmabuf_fd < 0 || (dmabuf_fd = dup (dmabuf_fd)) < 0)
    goto error_create_dmabuf_handle;

  mem = gst_dmabuf_allocator_alloc (allocator, dmabuf_fd,
      gst_vaapi_buffer_proxy_get_size (dmabuf_proxy));
  if (!mem)
    goto error_create_dmabuf_memory;

  gst_mini_object_set_qdata (GST_MINI_OBJECT_CAST (mem),
      GST_VAAPI_BUFFER_PROXY_QUARK, dmabuf_proxy,
      (GDestroyNotify) gst_vaapi_buffer_proxy_unref);
  return mem;

  /* ERRORS */
error_create_surface:
  {
    GST_ERROR ("failed to create VA surface (format:%s size:%ux%u)",
        gst_video_format_to_string (GST_VIDEO_INFO_FORMAT (vip)),
        GST_VIDEO_INFO_WIDTH (vip), GST_VIDEO_INFO_HEIGHT (vip));
    return NULL;
  }
error_create_surface_proxy:
  {
    GST_ERROR ("failed to create VA surface proxy");
    gst_vaapi_object_unref (surface);
    return NULL;
  }
error_create_dmabuf_proxy:
  {
    GST_ERROR ("failed to export VA surface to DMABUF");
    gst_vaapi_surface_proxy_unref (proxy);
    return NULL;
  }
error_create_dmabuf_handle:
  {
    GST_ERROR ("failed to duplicate DMABUF handle");
    gst_vaapi_buffer_proxy_unref (dmabuf_proxy);
    return NULL;
  }
error_create_dmabuf_memory:
  {
    GST_ERROR ("failed to create DMABUF memory");
    gst_vaapi_buffer_proxy_unref (dmabuf_proxy);
    return NULL;
  }
}