Membrane WAV Plugin

This repository provides WAV Parser.

It is part of Membrane Multimedia Framework.

Installation

The package can be installed by adding membrane_wav_plugin to your list of dependencies in mix.exs:

def deps do
  [
    {:membrane_wav_plugin, "~> 0.1.0"}
  ]
end

Parser

The Parser requires a WAV file on the input and provides a raw audio in uncompressed, PCM format on the output.

Parsing steps:

Reading WAV header
Extracting audio metadata and sending it through caps to the next element
Sending only audio samples to the next elements

It can parse only uncompressed audio.

Sample usage

defmodule Mixing.Pipeline do
  use Membrane.Pipeline

  @impl true
  def handle_init(_) do
    children = [
      file_src: %Membrane.File.Source{location: "/tmp/input.wav"},
      parser: Membrane.WAV.Parser,
      converter: %Membrane.FFmpeg.SWResample.Converter{
        input_caps: %Membrane.Caps.Audio.Raw{channels: 1, sample_rate: 16_000, format: :s16le},
        output_caps: %Membrane.Caps.Audio.Raw{channels: 2, sample_rate: 48_000, format: :s16le}
      },
      player: Membrane.PortAudio.Sink
    ]

    links = [
      link(:file_src)
      |> to(:parser)
      |> to(:converter)
      |> to(:player)
    ]

    {{:ok, spec: %ParentSpec{children: children, links: links}}, %{}}
  end
end

Copyright and License

Licensed under the Apache License, Version 2.0