text: /*
   * GStreamer
   * Copyright (C) 2019 Matthew Waters <matthew@centricular.com>
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Library General Public
   * License as published by the Free Software Foundation; either
   * version 2 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Library General Public License for more details.
   *
   * You should have received a copy of the GNU Library General Public
   * License along with this library; if not, write to the
   * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   * Boston, MA 02110-1301, USA.
   */
  
  #ifndef _VK_DOWNLOAD_H_
  #define _VK_DOWNLOAD_H_
  
  #include <gst/gst.h>
  #include <gst/video/video.h>
  #include <gst/vulkan/vulkan.h>
  
  G_BEGIN_DECLS
  
  #define GST_TYPE_VULKAN_DOWNLOAD            (gst_vulkan_download_get_type())
  #define GST_VULKAN_DOWNLOAD(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VULKAN_DOWNLOAD,GstVulkanDownload))
  #define GST_VULKAN_DOWNLOAD_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VULKAN_DOWNLOAD,GstVulkanDownloadClass))
  #define GST_IS_VULKAN_DOWNLOAD(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VULKAN_DOWNLOAD))
  #define GST_IS_VULKAN_DOWNLOAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VULKAN_DOWNLOAD))
  
  typedef struct _GstVulkanDownload GstVulkanDownload;
  typedef struct _GstVulkanDownloadClass GstVulkanDownloadClass;
  
  struct DownloadMethod
  {
    const gchar       *name;
  
    GstStaticCaps     *in_template;
    GstStaticCaps     *out_template;
  
    gpointer          (*new_impl)                 (GstVulkanDownload * download);
    GstCaps *         (*transform_caps)           (gpointer impl,
                                                   GstPadDirection direction,
                                                   GstCaps * caps);
    gboolean          (*set_caps)                 (gpointer impl,
                                                   GstCaps * in_caps,
                                                   GstCaps * out_caps);
    void              (*propose_allocation)       (gpointer impl,
                                                   GstQuery * decide_query,
                                                   GstQuery * query);
    GstFlowReturn     (*perform)                  (gpointer impl,
                                                   GstBuffer * buffer,
                                                   GstBuffer ** outbuf);
    void              (*free)                     (gpointer impl);
  };
  
  struct _GstVulkanDownload
  {
    GstBaseTransform      parent;
  
    GstVulkanInstance     *instance;
    GstVulkanDevice       *device;
    GstVulkanQueue        *queue;
  
    GstCaps               *in_caps;
    GstCaps               *out_caps;
  
    /* all impl pointers */
    gpointer              *download_impls;
    guint                 current_impl;
  };
  
  struct _GstVulkanDownloadClass
  {
    GstBaseTransformClass video_sink_class;
  };
  
  GType gst_vulkan_download_get_type(void);
  
  G_END_DECLS
  
  #endif
  