/* GStreamer
 * Copyright (C) 2019 Seungha Yang <seungha.yang@navercorp.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 __GST_D3D11_DECODER_H__
#define __GST_D3D11_DECODER_H__

#include <gst/gst.h>
#include <gst/video/video.h>
#include <d3d9.h>
#include <dxva.h>
#include <dxva2api.h>
#include "gstd3d11_fwd.h"
#include "gstd3d11device.h"
#include "gstd3d11utils.h"

G_BEGIN_DECLS

#define GST_TYPE_D3D11_DECODER \
  (gst_d3d11_decoder_get_type())
#define GST_D3D11_DECODER(obj) \
  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_D3D11_DECODER,GstD3D11Decoder))
#define GST_D3D11_DECODER_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_D3D11_DECODER,GstD3D11DecoderClass))
#define GST_D3D11_DECODER_GET_CLASS(obj) \
  (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_D3D11_DECODER,GstD3D11DecoderClass))
#define GST_IS_D3D11_DECODER(obj) \
  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_D3D11_DECODER))
#define GST_IS_D3D11_DECODER_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_D3D11_DECODER))

typedef struct _GstD3D11DecoderOutputView GstD3D11DecoderOutputView;

struct _GstD3D11DecoderOutputView
{
  GstD3D11Device *device;
  ID3D11VideoDecoderOutputView *handle;
  guint view_id;
};

typedef enum
{
  GST_D3D11_CODEC_NONE,
  GST_D3D11_CODEC_H264,
  GST_D3D11_CODEC_VP9,
  GST_D3D11_CODEC_H265,

  /* the last of supported codec */
  GST_D3D11_CODEC_LAST
} GstD3D11Codec;

struct _GstD3D11Decoder
{
  GstObject parent;

  /* TRUE if decoder was successfully opened ever */
  gboolean opened;

  /*< private >*/
  GstD3D11DecoderPrivate *priv;
  gpointer padding[GST_PADDING_LARGE];
};

struct _GstD3D11DecoderClass
{
  GstObjectClass parent_class;
};

GType gst_d3d11_decoder_get_type (void);

GstD3D11Decoder * gst_d3d11_decoder_new (GstD3D11Device * device);

gboolean          gst_d3d11_decoder_open (GstD3D11Decoder * decoder,
                                          GstD3D11Codec codec,
                                          GstVideoInfo * info,
                                          guint pool_size,
                                          const GUID ** decoder_profiles,
                                          guint profile_size);

void              gst_d3d11_decoder_reset (GstD3D11Decoder * decoder);

gboolean          gst_d3d11_decoder_begin_frame (GstD3D11Decoder * decoder,
                                                 GstD3D11DecoderOutputView * output_view,
                                                 guint content_key_size,
                                                 gconstpointer content_key);

gboolean          gst_d3d11_decoder_end_frame (GstD3D11Decoder * decoder);

gboolean          gst_d3d11_decoder_get_decoder_buffer (GstD3D11Decoder * decoder,
                                                        D3D11_VIDEO_DECODER_BUFFER_TYPE type,
                                                        guint * buffer_size,
                                                        gpointer * buffer);

gboolean          gst_d3d11_decoder_release_decoder_buffer (GstD3D11Decoder * decoder,
                                                            D3D11_VIDEO_DECODER_BUFFER_TYPE type);

gboolean          gst_d3d11_decoder_submit_decoder_buffers (GstD3D11Decoder * decoder,
                                                            guint buffer_count,
                                                            const D3D11_VIDEO_DECODER_BUFFER_DESC * buffers);

GstBuffer *       gst_d3d11_decoder_get_output_view_buffer (GstD3D11Decoder * decoder);

GstD3D11DecoderOutputView * gst_d3d11_decoder_get_output_view_from_buffer (GstD3D11Decoder * decoder,
                                                                           GstBuffer * buffer);

guint             gst_d3d11_decoder_get_output_view_index (GstD3D11Decoder * decoder,
                                                           ID3D11VideoDecoderOutputView * view_handle);

gboolean          gst_d3d11_decoder_copy_decoder_buffer (GstD3D11Decoder * decoder,
                                                         GstVideoInfo * info,
                                                         GstBuffer * decoder_buffer,
                                                         GstBuffer * output);

G_END_DECLS

#endif /* __GST_D3D11_DECODER_H__ */
