/*
 * GStreamer
 * Copyright (C) 2023 Igalia, S.L.
 *
 * 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.
 */

#pragma once

#include <gst/vulkan/vulkan.h>

#define GST_TYPE_VULKAN_ENCODER         (gst_vulkan_encoder_get_type())
#define GST_VULKAN_ENCODER(o)           (G_TYPE_CHECK_INSTANCE_CAST((o), GST_TYPE_VULKAN_ENCODER, GstVulkanEncoder))
#define GST_VULKAN_ENCODER_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), GST_TYPE_VULKAN_ENCODER, GstVulkanEncoderClass))
#define GST_IS_VULKAN_ENCODER(o)        (G_TYPE_CHECK_INSTANCE_TYPE((o), GST_TYPE_VULKAN_ENCODER))
#define GST_IS_VULKAN_ENCODER_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE((k), GST_TYPE_VULKAN_ENCODER))
#define GST_VULKAN_ENCODER_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS((o), GST_TYPE_VULKAN_ENCODER, GstVulkanEncoderClass))
GST_VULKAN_API
GType gst_vulkan_encoder_get_type       (void);

typedef struct _GstVulkanEncoder GstVulkanEncoder;
typedef struct _GstVulkanEncoderClass GstVulkanEncoderClass;
typedef struct _GstVulkanEncoderQualityPoperties GstVulkanEncoderQualityProperties;
typedef union _GstVulkanEncoderParameters GstVulkanEncoderParameters;
typedef union _GstVulkanEncoderParametersOverrides GstVulkanEncoderParametersOverrides;
typedef union _GstVulkanEncoderParametersFeedback GstVulkanEncoderParametersFeedback;
typedef struct _GstVulkanEncoderPicture GstVulkanEncoderPicture;
typedef struct _GstVulkaneEncoderCallbacks GstVulkanEncoderCallbacks;

/**
 * GstVulkaneEncoderCallbacks:
 * @setup_codec_pic: Called after VkVideoEncodeInfoKHR and
 *     VkVideoReferenceSlotInfoKHR are filled so they can be chained with the
 *     specific codec structures. Called in gst_vulkan_encoder_encode().
 * @setup_rc_pic: Called after VkVideoEncodeRateControlInfoKHR and
 *     VkVideoEncodeRateControlLayerInfoKHR are filled so they can be chained
 *     with the specific codec structures. Called in
 *     gst_vulkan_encoder_encode().
 *
 * See gst_vulkan_encoder_set_callbacks()
 */
struct _GstVulkaneEncoderCallbacks
{
  void (*setup_codec_pic) (GstVulkanEncoderPicture * pic,
      VkVideoEncodeInfoKHR * info, gpointer data);
  void (*setup_rc_pic) (GstVulkanEncoderPicture * pic,
      VkVideoEncodeRateControlInfoKHR * info,
      VkVideoEncodeRateControlLayerInfoKHR * layer, gpointer data);
};

/**
 * GstVulkanEncoderPicture:
 * @slotIndex: slot index
 * @offset: headers offset
 * @in_buffer: input buffer
 * @out_buffer: output buffer
 *
 * It contains the whole state for encoding a single picture.
 *
 * Since: 1.24
 */
struct _GstVulkanEncoderPicture
{
  guint64 offset;

  GstBuffer *in_buffer;
  GstBuffer *dpb_buffer;
  GstBuffer *out_buffer;

  /* Input frame */
  GstVulkanImageView *img_view;
  GstVulkanImageView *dpb_view;

  VkVideoPictureResourceInfoKHR dpb;
  VkVideoReferenceSlotInfoKHR dpb_slot;

  gpointer codec_rc_info;
};

/**
 * GstVulkanEncoder:
 * @parent: the parent #GstObject
 * @queue: the #GstVulkanQueue to command buffers will be allocated from
 *
 * Since: 1.24
 **/
struct _GstVulkanEncoder
{
  GstObject parent;

  GstVulkanQueue *queue;

  guint codec;

  /* <private> */
  gpointer _reserved        [GST_PADDING];
};

/**
 * GstVulkanEncoderClass:
 * @parent_class: the parent #GstObjectClass
 *
 * Since: 1.24
 */
struct _GstVulkanEncoderClass
{
  GstObjectClass parent;
  /* <private> */
  gpointer _reserved        [GST_PADDING];
};

union _GstVulkanEncoderParameters
{
  /*< private >*/
  VkVideoEncodeH264SessionParametersCreateInfoKHR h264;
  VkVideoEncodeH265SessionParametersCreateInfoKHR h265;
};

union _GstVulkanEncoderParametersOverrides
{
  /*< private >*/
  VkVideoEncodeH264SessionParametersGetInfoKHR h264;
  VkVideoEncodeH265SessionParametersGetInfoKHR h265;
};

union _GstVulkanEncoderParametersFeedback
{
  VkVideoEncodeH264SessionParametersFeedbackInfoKHR h264;
  VkVideoEncodeH265SessionParametersFeedbackInfoKHR h265;
};

struct _GstVulkanEncoderQualityPoperties
{
  gint32 quality_level;
  union
  {
    VkVideoEncodeH264QualityLevelPropertiesKHR h264;
    VkVideoEncodeH265QualityLevelPropertiesKHR h265;
  } codec;
};

G_DEFINE_AUTOPTR_CLEANUP_FUNC (GstVulkanEncoder, gst_object_unref)

GST_VULKAN_API
GstVulkanEncoder *      gst_vulkan_encoder_create_from_queue    (GstVulkanQueue * queue,
                                                                 guint codec);

GST_VULKAN_API
void                    gst_vulkan_encoder_set_callbacks        (GstVulkanEncoder * self,
                                                                 GstVulkanEncoderCallbacks * callbacks,
                                                                 gpointer user_data,
                                                                 GDestroyNotify notify);
GST_VULKAN_API
void                    gst_vulkan_encoder_set_rc_mode          (GstVulkanEncoder * self,
                                                                 VkVideoEncodeRateControlModeFlagBitsKHR rc_mode);

GST_VULKAN_API
gboolean                gst_vulkan_encoder_start                (GstVulkanEncoder * self,
                                                                 GstVulkanVideoProfile * profile,
                                                                 GstVulkanEncoderQualityProperties * codec_quality_props,
                                                                 GError ** error);
GST_VULKAN_API
gboolean                gst_vulkan_encoder_stop                 (GstVulkanEncoder * self);
GST_VULKAN_API
gboolean                gst_vulkan_encoder_update_video_session_parameters
                                                                (GstVulkanEncoder * self,
                                                                 GstVulkanEncoderParameters *enc_params,
                                                                 GError ** error);
GST_VULKAN_API
gboolean                gst_vulkan_encoder_video_session_parameters_overrides
                                                                (GstVulkanEncoder * self,
                                                                 GstVulkanEncoderParametersOverrides * params,
                                                                 GstVulkanEncoderParametersFeedback * feedback,
                                                                 gsize * data_size,
                                                                 gpointer * data,
                                                                 GError ** error);
GST_VULKAN_API
gboolean                gst_vulkan_encoder_create_dpb_pool      (GstVulkanEncoder * self,
                                                                 GstCaps * caps);
GST_VULKAN_API
gboolean                gst_vulkan_encoder_encode               (GstVulkanEncoder * self,
                                                                 GstVideoInfo * info,
                                                                 GstVulkanEncoderPicture * pic,
                                                                 guint nb_refs,
                                                                 GstVulkanEncoderPicture ** ref_pics);
GST_VULKAN_API
gboolean                gst_vulkan_encoder_caps                 (GstVulkanEncoder * self,
                                                                 GstVulkanVideoCapabilities * caps);
GST_VULKAN_API
GstCaps *               gst_vulkan_encoder_profile_caps         (GstVulkanEncoder * self);
GST_VULKAN_API
gint32                  gst_vulkan_encoder_quality_level        (GstVulkanEncoder * self);

GST_VULKAN_API
gboolean                gst_vulkan_encoder_picture_init         (GstVulkanEncoderPicture * pic,
                                                                 GstVulkanEncoder * self,
                                                                 GstBuffer * in_buffer,
                                                                 gsize size);
GST_VULKAN_API
void                    gst_vulkan_encoder_picture_clear        (GstVulkanEncoderPicture * pic,
                                                                 GstVulkanEncoder * self);