%%{
  init: {
    'themeVariables': {
      'fontFamily': 'BlinkMacSystemFont, Segoe UI, Noto Sans, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji'
    }
  }
}%%
classDiagram

  Player *-- PlatformPlayer
  PlatformPlayer <|-- libmpv_Player
  PlatformPlayer <|-- web_Player
  PlatformPlayer *-- PlayerState
  PlatformPlayer *-- PlayerStreams
  PlatformPlayer o-- PlayerConfiguration

  libmpv_Player <.. NativeLibrary
  
  Playable <.. Media
  Playable <.. Playlist
  
  class Playable {
  }
  
  class Media {
    +String uri
    +dynamic extras
  }

  class Playlist {
    +List<Media> medias
    +index index
  }

  class PlayerConfiguration {
    + bool osc
    + bool vid
    + String vo
    + String title
    ... other initialization values
  }

  class PlayerStreams {
    +Stream<Playlist> playlist
    +Stream<bool> playing
    +Stream<bool> completed
    +Stream<Duration> position
    +Stream<Duration> duration
    +Stream<Duration> buffer
    +Stream<double> volume
    +Stream<double> rate
    +Stream<double> pitch
    +Stream<bool> buffering
    +Stream<PlayerLog> log
    +Stream<PlayerError> error
    +Stream<AudioParams> audioParams
    +Stream<double?> audioBitrate
    +Stream<AudioDevice> audioDevice
    +Stream<List<AudioDevice>> audioDevices
    +Stream<Track> track
    +Stream<Tracks> tracks
    +Stream<int> width
    +Stream<int> height
  }

  class PlayerState {
    +Playlist playlist
    +bool playing
    +bool completed
    +Duration position
    +Duration duration
    +Duration buffer
    +double volume
    +double rate
    +double pitch
    +bool buffering
    +PlayerLog log
    +PlayerError error
    +AudioParams audioParams
    +double? audioBitrate
    +AudioDevice audioDevice
    +List<AudioDevice audioDevices
    +Track track
    +Tracks tracks
    +int width
    +int height
  }

  class Player {
    +PlatformPlayer? platform

    +«get» PlayerState state
    +«get» PlayerStreams streams

    +dispose()
    +open(playable: Playable)
    +play()
    +pause()
    +playOrPause()
    +add(media: Media)
    +remove(index: int)
    +next()
    +previous()
    +jump(index: int)
    +move(from: int, to: int)
    +seek(duration: Duration)
    +setPlaylistMode(playlistMode: PlaylistMode)
    +setVolume(volume: double)
    +setRate(rate: double)
    +setPitch(pitch: double)
    +setShuffle(bool: double)
    +setVideoTrack(track: VideoTrack)
    +setAudioTrack(track: AudioTrack)
    +setSubtitleTrack(track: SubtitleTrack)
  }

  class PlatformPlayer {
    +PlayerState state
    +PlayerStreams streams
    +PlayerConfiguration configuration
    
    +dispose()*
    +open(playable: Playable)*
    +play()*
    +pause()*
    +playOrPause()*
    +add(media: Media)*
    +remove(index: int)*
    +next()*
    +previous()*
    +jump(index: int)*
    +move(from: int, to: int)*
    +seek(duration: Duration)*
    +setPlaylistMode(playlistMode: PlaylistMode)*
    +setVolume(volume: double)*
    +setRate(rate: double)*
    +setPitch(pitch: double)*
    +setShuffle(bool: double)*
    +setVideoTrack(track: VideoTrack)*
    +setAudioTrack(track: AudioTrack)*
    +setSubtitleTrack(track: SubtitleTrack)*

    +«get» handle: Future<int>*

    #StreamController<Playlist> playlistController
    #StreamController<bool> playingController
    #StreamController<bool> completedController
    #StreamController<Duration> positionController
    #StreamController<Duration> durationController
    #StreamController<Duration> bufferController
    #StreamController<double> volumeController
    #StreamController<double> rateController
    #StreamController<double> pitchController
    #StreamController<bool> bufferingController
    #StreamController<PlayerLog> logController
    #StreamController<PlayerError> errorController
    #StreamController<AudioParams> audioParamsController
    #StreamController<double?> audioBitrateController
    #StreamController<AudioDevice> audioDeviceController
    #StreamController<List<AudioDevice>> audioDevicesController
    #StreamController<Track> trackController
    #StreamController<Tracks> tracksController
    #StreamController<int> widthController
    #StreamController<int> heightController
  }

  class libmpv_Player {
    +dispose()
    +open(playable: Playable)
    +play()
    +pause()
    +playOrPause()
    +add(media: Media)
    +remove(index: int)
    +next()
    +previous()
    +jump(index: int)
    +move(from: int, to: int)
    +seek(duration: Duration)
    +setPlaylistMode(playlistMode: PlaylistMode)
    +setVolume(volume: double)
    +setRate(rate: double)
    +setPitch(pitch: double)
    +setShuffle(bool: double)
    +setVideoTrack(track: VideoTrack)
    +setAudioTrack(track: AudioTrack)
    +setSubtitleTrack(track: SubtitleTrack)

    +«get» handle: Future<int>
  }
  
  class web_Player {
    +dispose()
    +open(playable: Playable)
    +play()
    +pause()
    +playOrPause()
    +add(media: Media)
    +remove(index: int)
    +next()
    +previous()
    +jump(index: int)
    +move(from: int, to: int)
    +seek(duration: Duration)
    +setPlaylistMode(playlistMode: PlaylistMode)
    +setVolume(volume: double)
    +setRate(rate: double)
    +setPitch(pitch: double)
    +setShuffle(bool: double)
    +setVideoTrack(track: VideoTrack)
    +setAudioTrack(track: AudioTrack)
    +setSubtitleTrack(track: SubtitleTrack)

    +«get» handle: Future<int>
  }

  class NativeLibrary {
    +find()$ String?
  }

%%{
  init: {
    'themeVariables': {
      'fontFamily': 'BlinkMacSystemFont, Segoe UI, Noto Sans, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji'
    }
  }
}%%
classDiagram

  MediaKitVideoPlugin "1" *-- "1" VideoOutputManager: Create VideoOutput(s) with VideoOutputManager for handle passed through platform channel
  VideoOutputManager "1" *-- "*" VideoOutput: Create VideoOutput(s) to send back id & wid for render. Dispose to release.
  VideoOutput <.. MediaKitAndroidHelper: Create & dispose JNI global object reference to android.view.Surface (for --wid)
  MediaKitVideoPlugin <.. MPVLib: Initialize libmpv for usage on Android. Taken from mpv for Android.
  
  class MediaKitVideoPlugin {
    -MethodChannel channel
    -VideoOutputManager videoOutputManager
  }
  
  class VideoOutputManager {
    -HashMap<Long, VideoOutput> videoOutputs
    -TextureRegistry textureRegistryReference
    -Object lock
    
    +create(long handle): VideoOutput
    +dispose(long handle): void
  }
  
  class VideoOutput {
    -Surface surface
    -TextureRegistry.SurfaceTextureEntry surfaceTextureEntry
    
    +long id
    +long wid
    
    +dispose()
  }
  
  class MediaKitAndroidHelper {
    +newGlobalObjectRef(obj: Object): long
    +deleteGlobalObjectRef(ref: long): void
    +setApplicationContext(context: Context): void
    +copyAssetToExternalFilesDir(assetName: String): String
  }
  
  class MPVLib {
    +create(context: Context): context
  }
  

%%{
  init: {
    'themeVariables': {
      'fontFamily': 'BlinkMacSystemFont, Segoe UI, Noto Sans, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji'
    }
  }
}%%
classDiagram

  MediaKitVideoPlugin "1" *-- "1" VideoOutputManager: Create VideoOutput(s) with VideoOutputManager for handle passed through platform channel
  VideoOutputManager "1" *-- "*" VideoOutput: Takes PluginRegistrarWindows as reference
  VideoOutputManager "1" *-- "1" ThreadPool
  VideoOutput "*" o-- "1" ThreadPool: Post creation, resize & render etc. tasks involving EGL to ensure synchronous EGL/ANGLE usage across multiple VideoOutput(s)
  VideoOutput "1" *-- "1" ANGLESurfaceManager: Only for H/W accelerated rendering

  class MediaKitVideoPlugin {
    -flutter::PluginRegistrarWindows registrar_
    -std::unique_ptr<MethodChannel> channel_
    -std::unique_ptr<VideoOutputManager> video_output_manager_
    -HandleMethodCall(method_call, result);
  }

  class ThreadPool {
    +Post(function: std::function)
  }

  class VideoOutputManager {
    +Create(handle: int, width: optional<int>, height: optional<int>, texture_update_callback: std::function)
    +Dispose(handle: int)

    -std::mutex mutex_
    -std::unique_ptr<ThreadPool> thread_pool_
    -flutter::PluginRegistrarWindows registrar_
    -std::unordered_map<int64_t, std::unique_ptr<VideoOutput>> video_outputs_
  }

  class VideoOutput {
    +«get» texture_id: int64_t
    +«get» width: int64_t
    +«get» height: int64_t
    -mpv_handle* handle_
    -mpv_render_context* render_context_
    -std::optional<int64_t> width_
    -std::optional<int64_t> height_
    -bool enable_hardware_acceleration_
    -int64_t texture_id_
    -flutter::PluginRegistrarWindows registrar_
    -ThreadPool* thread_pool_ref_
    -bool destroyed_
    -std::mutex textures_mutex_
    -std::unordered_map<int64_t, std::unique_ptr<flutter::TextureVariant>> texture_variants_
    -std::unique_ptr<ANGLESurfaceManager> surface_manager_ HW
    -std::unordered_map<int64_t, std::unique_ptr<FlutterDesktopGpuSurfaceDescriptor>> textures_ HW
    -std::unique_ptr<uint8_t[]> pixel_buffer_ SW
    -std::unordered_map<int64_t, std::unique_ptr<FlutterDesktopPixelBuffer>> pixel_buffer_textures_ SW
    -std::function texture_update_callback_

    +SetTextureUpdateCallback(callback: std::function<void(int64_t, int64_t, int64_t)>)
    +SetSize(width: std::optional<int64_t>, height: std::optional<int64_t>)
    -NotifyRender()
    -Render()
    -CheckAndResize()
    -Resize(required_width: int64_t, required_height: int64_t)
    -GetVideoWidth(): int64_t
    -GetVideoHeight(): int64_t
  }

  class ANGLESurfaceManager {
    +«get» width: int32_t
    +«get» height: int32_t
    +«get» handle: HANDLE

    +HandleResize(width: int32_t, height: int32_t)
    +Draw(draw_callback: std::function<void()>)
    +Read()
    +SwapBuffers()
    +MakeCurrent(value: bool)
    -CreateEGLDisplay()
    -Initialize()
    -InitializeD3D11()
    -InitializeD3D9()
    -CleanUp(release_context: bool)
    -CreateEGLDisplay()
    -ShowFailureMessage(message: wchar_t[])

    -IDXGIAdapter* adapter_
    -int32_t width_
    -int32_t height_
    -ID3D11Device* d3d_11_device_
    -ID3D11DeviceContext* d3d_11_device_context_
    -Microsoft::WRL::ComPtr<ID3D11Texture2D>
    -Microsoft::WRL::ComPtr<IDXGISwapChain>
    -IDirect3D9Ex* d3d_9_ex_
    -IDirect3DDevice9Ex* d3d_9_device_ex_
    -IDirect3DTexture9* d3d_9_texture_
    -HANDLE handle_
    -EGLSurface surface_
    -EGLDisplay display_
    -EGLContext context_
    -EGLConfig config_
  }

%%{
  init: {
    'themeVariables': {
      'fontFamily': 'BlinkMacSystemFont, Segoe UI, Noto Sans, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji'
    }
  }
}%%
classDiagram

  MediaKitVideoPlugin "1" *-- "1" VideoOutputManager: Create VideoOutput(s) with VideoOutputManager for handle passed through platform channel
  VideoOutputManager "1" *-- "*" VideoOutput: Takes FlTextureRegistrar as reference
  VideoOutput "1" *-- "1" TextureGL: For H/W rendering.
  TextureGL "1" o-- "1" VideoOutput: Take VideoOutput as reference
  VideoOutput "1" *-- "1" TextureSW: For S/W rendering.
  TextureSW "1" o-- "1" VideoOutput: Take VideoOutput as reference
  TextureGL "1" <-- "1" FlTextureGL
  TextureSW "1" <-- "1" FlTexture

  class MediaKitVideoPlugin {
    -FlMethodChannel* channel
    -VideoOutputManager* video_output_manager
  }

  class VideoOutputManager {
    -GHashTable* video_outputs
    -FlTextureRegistrar* texture_registrar
    +video_output_manager_create(self: VideoOutputManager*, handle: gint64, width: gint64, height: gint64, texture_update_callback: TextureUpdateCallback, texture_update_callback_context: gpointer)
    +video_output_manager_dispose(self: VideoOutputManager*, handle: gint64)
  }

  class VideoOutput {
    -TextureGL* texture_gl
    -GdkGLContext* context_gl
    -mpv_handle* handle
    -mpv_render_context* render_context
    -gint64 width
    -gint64 height
    -TextureUpdateCallback texture_update_callback
    -gpointer texture_update_callback_context
    -FlTextureRegistrar* texture_registrar
    +video_output_set_texture_update_callback(self: VideoOutput*, texture_update_callback: TextureUpdateCallback, texture_update_callback_context: gpointer)
    +video_output_get_render_context(self: VideoOutput*): mpv_render_context*
    +video_output_get_width(self: VideoOutput*): gint64
    +video_output_get_height(self: VideoOutput*): gint64
    +video_output_get_texture_id(self: VideoOutput*): gint64
    +video_output_notify_texture_update(self: VideoOutput*);
  }

  class TextureGL {
    -guint32 name
    -guint32 fbo
    -guint32 current_width
    -guint32 current_height
    -VideoOutput* video_output
    texture_gl_populate_texture(texture: FlTextureGL*, target: guint32*, name: guint32*, width: guint32*, height: guint32*, error: GError**): gboolean
  }

  class TextureSW {
    -guint32 current_width
    -guint32 current_height
    -VideoOutput* video_output
    texture_sw_copy_pixels(texture: FlPixelBufferTexture*, buffer: const uint8_t**, width: uint32_t*, height: uint32_t*, error: GError**): gboolean
  }