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membrane_core

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Membrane Multimedia Framework (Core)

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membrane_core lib membrane core component.ex
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lib/membrane/core/component.ex 

defmodule Membrane.Core.Component do

  @moduledoc false



  @type state ::

          Membrane.Core.Pipeline.State.t()

          | Membrane.Core.Bin.State.t()

          | Membrane.Core.Element.State.t()



  @type callback_context_optional_fields ::

          Membrane.Core.Element.CallbackContext.optional_fields()

          | Membrane.Core.Bin.CallbackContext.optional_fields()

          | Membrane.Core.Pipeline.CallbackContext.optional_fields()



  @type callback_context ::

          Membrane.Element.CallbackContext.t()

          | Membrane.Bin.CallbackContext.t()

          | Membrane.Pipeline.CallbackContext.t()



  @spec action_handler(state) :: module

  [Pipeline, Bin, Element]

  |> Enum.map(fn component ->

    def action_handler(%unquote(Module.concat([Membrane.Core, component, State])){}),

      do: unquote(Module.concat([Membrane.Core, component, ActionHandler]))

  end)



  @spec context_from_state(state(), callback_context_optional_fields()) ::

          callback_context()

  def context_from_state(state, args \\ []) do

    alias Membrane.Core.{Bin, Element, Pipeline}



    callback_context_module =

      case state do

        %Element.State{} -> Element.CallbackContext

        %Bin.State{} -> Bin.CallbackContext

        %Pipeline.State{} -> Pipeline.CallbackContext

      end



    callback_context_module.from_state(state, args)

  end



  @spec is_pipeline?(state) :: boolean()

  def is_pipeline?(%Membrane.Core.Pipeline.State{}), do: true

  def is_pipeline?(_state), do: false



  @spec is_element?(state) :: boolean()

  def is_element?(%Membrane.Core.Element.State{}), do: true

  def is_element?(_state), do: false



  @spec is_bin?(state) :: boolean()

  def is_bin?(%Membrane.Core.Bin.State{}), do: true

  def is_bin?(_state), do: false



  @spec is_child?(state) :: boolean()

  def is_child?(state), do: is_element?(state) or is_bin?(state)



  @spec is_parent?(state) :: boolean()

  def is_parent?(state), do: is_pipeline?(state) or is_bin?(state)

end