/*
 * Copyright (C) 2018 NVIDIA CORPORATION.
 *    Author: Amit Pandya <apandya@nvidia.com>
 * Factored out from gstv4l2h264enc by Philippe Normand <philn@igalia.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.
 *
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "gstv4l2h265codec.h"

#include <gst/gst.h>
#include "ext/v4l2-controls.h"


static gint
v4l2_profile_from_string (const gchar * profile)
{
  gint v4l2_profile = -1;

  if (g_str_equal (profile, "main")) {
    v4l2_profile = V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN;
  } else if (g_str_equal (profile, "main-still-picture")) {
    v4l2_profile = V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_STILL_PICTURE;
  } else if (g_str_equal (profile, "main-10")) {
    v4l2_profile = V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10;
  } else {
    GST_WARNING ("Unsupported profile string '%s'", profile);
  }

  return v4l2_profile;
}

static const gchar *
v4l2_profile_to_string (gint v4l2_profile)
{
  switch (v4l2_profile) {
    case V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN:
      return "main";
    case V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_STILL_PICTURE:
      return "main-still-picture";
    case V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10:
      return "main-10";
    default:
      GST_WARNING ("Unsupported V4L2 profile %i", v4l2_profile);
      break;
  }
  return NULL;
}

static gint
v4l2_level_from_string (const gchar * level)
{
  gint v4l2_level = -1;

  if (g_str_equal (level, "1"))
    v4l2_level = V4L2_MPEG_VIDEO_HEVC_LEVEL_1;
  else if (g_str_equal (level, "2"))
    v4l2_level = V4L2_MPEG_VIDEO_HEVC_LEVEL_2;
  else if (g_str_equal (level, "2.1"))
    v4l2_level = V4L2_MPEG_VIDEO_HEVC_LEVEL_2_1;
  else if (g_str_equal (level, "3"))
    v4l2_level = V4L2_MPEG_VIDEO_HEVC_LEVEL_3;
  else if (g_str_equal (level, "3.1"))
    v4l2_level = V4L2_MPEG_VIDEO_HEVC_LEVEL_3_1;
  else if (g_str_equal (level, "4"))
    v4l2_level = V4L2_MPEG_VIDEO_HEVC_LEVEL_4;
  else if (g_str_equal (level, "4.1"))
    v4l2_level = V4L2_MPEG_VIDEO_HEVC_LEVEL_4_1;
  else if (g_str_equal (level, "5"))
    v4l2_level = V4L2_MPEG_VIDEO_HEVC_LEVEL_5;
  else if (g_str_equal (level, "5.1"))
    v4l2_level = V4L2_MPEG_VIDEO_HEVC_LEVEL_5_1;
  else if (g_str_equal (level, "5.2"))
    v4l2_level = V4L2_MPEG_VIDEO_HEVC_LEVEL_5_2;
  else if (g_str_equal (level, "6"))
    v4l2_level = V4L2_MPEG_VIDEO_HEVC_LEVEL_6;
  else if (g_str_equal (level, "6.1"))
    v4l2_level = V4L2_MPEG_VIDEO_HEVC_LEVEL_6_1;
  else if (g_str_equal (level, "6.2"))
    v4l2_level = V4L2_MPEG_VIDEO_HEVC_LEVEL_6_2;
  else
    GST_WARNING ("Unsupported level '%s'", level);

  return v4l2_level;
}

static const gchar *
v4l2_level_to_string (gint v4l2_level)
{
  switch (v4l2_level) {
    case V4L2_MPEG_VIDEO_HEVC_LEVEL_1:
      return "1";
    case V4L2_MPEG_VIDEO_HEVC_LEVEL_2:
      return "2";
    case V4L2_MPEG_VIDEO_HEVC_LEVEL_2_1:
      return "2.1";
    case V4L2_MPEG_VIDEO_HEVC_LEVEL_3:
      return "3";
    case V4L2_MPEG_VIDEO_HEVC_LEVEL_3_1:
      return "3.1";
    case V4L2_MPEG_VIDEO_HEVC_LEVEL_4:
      return "4";
    case V4L2_MPEG_VIDEO_HEVC_LEVEL_4_1:
      return "4.1";
    case V4L2_MPEG_VIDEO_HEVC_LEVEL_5:
      return "5";
    case V4L2_MPEG_VIDEO_HEVC_LEVEL_5_1:
      return "5.1";
    case V4L2_MPEG_VIDEO_HEVC_LEVEL_5_2:
      return "5.2";
    case V4L2_MPEG_VIDEO_HEVC_LEVEL_6:
      return "6";
    case V4L2_MPEG_VIDEO_HEVC_LEVEL_6_1:
      return "6.1";
    case V4L2_MPEG_VIDEO_HEVC_LEVEL_6_2:
      return "6.2";
    default:
      GST_WARNING ("Unsupported V4L2 level %i", v4l2_level);
      break;
  }

  return NULL;
}

const GstV4l2Codec *
gst_v4l2_h265_get_codec (void)
{
  static GstV4l2Codec *codec = NULL;
  if (g_once_init_enter (&codec)) {
    static GstV4l2Codec c;
    c.profile_cid = V4L2_CID_MPEG_VIDEO_HEVC_PROFILE;
    c.profile_to_string = v4l2_profile_to_string;
    c.profile_from_string = v4l2_profile_from_string;
    c.level_cid = V4L2_CID_MPEG_VIDEO_HEVC_LEVEL;
    c.level_to_string = v4l2_level_to_string;
    c.level_from_string = v4l2_level_from_string;
    g_once_init_leave (&codec, &c);
  }
  return codec;
}