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membrane_hls_plugin
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Adaptive live streaming (HLS) plugin for the Membrane Framework.
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lib/membrane/hls.ex
defmodule Membrane.HLS do
require Logger
def maybe_warn_deprecated_stream_fields(_track_id, stream)
when not is_struct(stream, HLS.VariantStream),
do: :ok
def maybe_warn_deprecated_stream_fields(track_id, %HLS.VariantStream{} = stream) do
if stream.bandwidth do
Logger.warning(
"[DEPRECATED] build_stream for track #{inspect(track_id)} sets VariantStream.bandwidth. " <>
"Bandwidth is now computed automatically by SinkBin/Packager and user-provided values are ignored over time."
)
end
if stream.codecs not in [nil, []] do
Logger.warning(
"[DEPRECATED] build_stream for track #{inspect(track_id)} sets VariantStream.codecs. " <>
"CODECS are now computed automatically from stream formats when available."
)
end
:ok
end
def serialize_codecs(codecs) do
codecs
|> Enum.map(&serialize_codec(&1))
|> Enum.reject(&is_nil/1)
end
defp serialize_codec({:avc1, %{profile: profile, compatibility: compatibility, level: level}}) do
[profile, compatibility, level]
|> Enum.map(&Integer.to_string(&1, 16))
|> Enum.map_join(&String.pad_leading(&1, 2, "0"))
|> then(&"avc1.#{&1}")
|> String.downcase()
end
defp serialize_codec({:hvc1, %{profile: profile, level: level}}),
do: "hvc1.#{profile}.4.L#{level}.B0"
defp serialize_codec({:mp4a, %{aot_id: aot_id}}), do: String.downcase("mp4a.40.#{aot_id}")
defp serialize_codec(_other), do: nil
end