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diff --git a/lib/pleroma/upload/filter/analyze_metadata.ex b/lib/pleroma/upload/filter/analyze_metadata.ex
index 99d1ec5bc..92b80b1b1 100644
--- a/lib/pleroma/upload/filter/analyze_metadata.ex
+++ b/lib/pleroma/upload/filter/analyze_metadata.ex
@@ -1,103 +1,105 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Upload.Filter.AnalyzeMetadata do
@moduledoc """
Extracts metadata about the upload, such as width/height
"""
require Logger
alias Vix.Vips.Image
alias Vix.Vips.Operation
@behaviour Pleroma.Upload.Filter
@spec filter(Pleroma.Upload.t()) ::
{:ok, :filtered, Pleroma.Upload.t()} | {:ok, :noop} | {:error, String.t()}
def filter(%Pleroma.Upload{tempfile: file, content_type: "image" <> _} = upload) do
try do
{:ok, image} = Image.new_from_file(file)
{width, height} = {Image.width(image), Image.height(image)}
upload =
upload
|> Map.put(:width, width)
|> Map.put(:height, height)
|> Map.put(:blurhash, get_blurhash(image))
{:ok, :filtered, upload}
rescue
e in ErlangError ->
Logger.warn("#{__MODULE__}: #{inspect(e)}")
{:ok, :noop}
end
end
def filter(%Pleroma.Upload{tempfile: file, content_type: "video" <> _} = upload) do
try do
result = media_dimensions(file)
upload =
upload
|> Map.put(:width, result.width)
|> Map.put(:height, result.height)
{:ok, :filtered, upload}
rescue
e in ErlangError ->
Logger.warn("#{__MODULE__}: #{inspect(e)}")
{:ok, :noop}
end
end
def filter(_), do: {:ok, :noop}
defp get_blurhash(file) do
with {:ok, blurhash} <- vips_blurhash(file) do
blurhash
else
_ -> nil
end
end
defp media_dimensions(file) do
with executable when is_binary(executable) <- System.find_executable("ffprobe"),
args = [
"-v",
"error",
"-show_entries",
"stream=width,height",
"-of",
"csv=p=0:s=x",
file
],
{result, 0} <- System.cmd(executable, args),
[width, height] <-
String.split(String.trim(result), "x") |> Enum.map(&String.to_integer(&1)) do
%{width: width, height: height}
else
nil -> {:error, {:ffprobe, :command_not_found}}
{:error, _} = error -> error
end
end
defp vips_blurhash(image = %Vix.Vips.Image{}) do
- {:ok, resized_image} = Operation.thumbnail_image(image, 100)
- {height, width} = {Image.height(resized_image), Image.width(resized_image)}
- max = max(height, width)
- {x, y} = {max(round(width * 5 / max), 1), max(round(height * 5 / max), 1)}
-
- {:ok, rgba} =
- if Image.has_alpha?(resized_image) do
- Image.to_list(resized_image)
- else
- Operation.bandjoin_const!(resized_image, [255])
- |> Image.to_list()
- end
-
- rgba = List.flatten(rgba)
-
- Blurhash.encode(x, y, width, height, rgba)
+ with {:ok, resized_image} <- Operation.thumbnail_image(image, 100),
+ {height, width} <- {Image.height(resized_image), Image.width(resized_image)},
+ max <- max(height, width),
+ {x, y} <- {max(round(width * 5 / max), 1), max(round(height * 5 / max), 1)} do
+ {:ok, rgba} =
+ if Image.has_alpha?(resized_image) do
+ Image.to_list(resized_image)
+ else
+ Operation.bandjoin_const!(resized_image, [255])
+ |> Image.to_list()
+ end
+
+ rgba = List.flatten(rgba)
+
+ Blurhash.encode(x, y, width, height, rgba)
+ else
+ _ -> nil
+ end
end
end

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