// %BANNER_BEGIN%
// ---------------------------------------------------------------------
// %COPYRIGHT_BEGIN%
// Copyright (c) 2022-2023 Magic Leap, Inc. All Rights Reserved.
// Use of this file is governed by the Magic Leap 2 Software License Agreement, located here: https://www.magicleap.com/software-license-agreement-ml2  
// Terms and conditions applicable to third-party materials accompanying this distribution may also be found in the top-level NOTICE file appearing herein.
// %COPYRIGHT_END%
// ---------------------------------------------------------------------
// %BANNER_END%

using System;
using UnityEngine;

namespace MagicLeap.Spectator
{
    public class H264Encoder : IVideoEncoder
    {
        #region Private variables

        IVideoEncoder encoder = null;

        #endregion

        #region Public properties

        public int Width { get; private set; }
        public int Height { get; private set; }

        #endregion

        #region Public events

        public event Action<byte[], int> onFrameEncoded
        {
            add => encoder.onFrameEncoded += value;
            remove => encoder.onFrameEncoded -= value;
        }

        #endregion

        #region Constructor / Destructor

        private H264Encoder(int width, int height, int bitrate)
        {
            Width = width;
            Height = height;

#if UNITY_EDITOR_WIN || UNITY_STANDALONE_WIN
            encoder = WinH264Encoder.Create(width, height, bitrate);
#elif UNITY_EDITOR_OSX || UNITY_STANDALONE_OSX
            encoder = MacH264Encoder.Create(width, height, bitrate);
#elif UNITY_ANDROID
            encoder = MLH264Encoder.Create(width, height, bitrate);
#endif
        }

        ~H264Encoder()
        {
            encoder = null;
        }

        #endregion

        #region Public methods

        public static H264Encoder Create(int width, int height, int bitrate)
        {
            H264Encoder encoder = new H264Encoder(width, height, bitrate);
            if (encoder.encoder == null) return null;
            return encoder;
        }

        public void Dispose() => encoder.Dispose();

        public void AttachToCamera(Camera camera, Material material = null) => encoder.AttachToCamera(camera, material);

        public void Push(Texture frame, Material material = null) => encoder.Push(frame, material);

        public bool TryRequestSyncFrame() => encoder.TryRequestSyncFrame();

        #endregion
    }
}