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membrane_rtp_plugin
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Membrane Multimedia Framework plugin for RTP
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lib/membrane/rtp/vad/vad_params.ex
defmodule Membrane.RTP.Vad.VadParams do
@moduledoc false
# The information about selected parameters used in multiple modules concerning VAD.
# Additionally it computes the `target_levels_length` which is the number audio levels needed for proper voice activity estimation. It is directly dependent on the VAD parameters.
# The parameters values are different for each environment and can be tweaked in the configuration files placed in `config` directory.
# The meaning of the parameters is described in the `Membrane.RTP.Vad.IsSpeakingEstimator`.
@default_parameters %{
immediate: %{
subunits: 1,
score_threshold: 0,
lambda: 1
},
medium: %{
subunits: 10,
score_threshold: 20,
subunit_threshold: 1,
lambda: 24
},
long: %{
subunits: 7,
score_threshold: 20,
subunit_threshold: 3,
lambda: 47
}
}
@params Application.compile_env(
:membrane_rtp_plugin,
:vad_estimation_parameters,
@default_parameters
)
@immediate @params.immediate
@medium @params.medium
@long @params.long
@spec vad_params() :: map()
def vad_params(), do: @params
@spec immediate() :: map()
def immediate(), do: @immediate
@spec medium() :: map()
def medium(), do: @medium
@spec long() :: map()
def long(), do: @long
@spec target_levels_length() :: pos_integer()
def target_levels_length(), do: @immediate.subunits * @medium.subunits * @long.subunits
end