X-Git-Url: http://git.squeep.com/?a=blobdiff_plain;f=lib%2Fpleroma%2Fhelpers%2Fmedia_helper.ex;h=cb95d0e68c45dee9c5aa4a02919c4485ddd3f70e;hb=07a48b9293e4046c50b5d424d60a1bf16c7cc198;hp=6d1f8ab2232eb539c5501487ac408454594e7491;hpb=6fd4f58ead9189697ed004b6ca593d5ba746898f;p=akkoma

diff --git a/lib/pleroma/helpers/media_helper.ex b/lib/pleroma/helpers/media_helper.ex
index 6d1f8ab22..cb95d0e68 100644
--- a/lib/pleroma/helpers/media_helper.ex
+++ b/lib/pleroma/helpers/media_helper.ex
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Helpers.MediaHelper do
@@ -7,56 +7,156 @@ defmodule Pleroma.Helpers.MediaHelper do
   Handles common media-related operations.
   """
 
-  @ffmpeg_opts [{:sync, true}, {:stdout, true}]
+  alias Pleroma.HTTP
 
-  def ffmpeg_resize_remote(uri, max_width, max_height) do
-    cmd = ~s"""
-    curl -L "#{uri}" |
-    ffmpeg -i pipe:0 -vf \
-      "scale='min(#{max_width},iw)':min'(#{max_height},ih)':force_original_aspect_ratio=decrease" \
-      -f image2 pipe:1 | \
-    cat
-    """
+  require Logger
 
-    with {:ok, [stdout: stdout_list]} <- Exexec.run(cmd, @ffmpeg_opts) do
-      {:ok, Enum.join(stdout_list)}
+  def missing_dependencies do
+    Enum.reduce([imagemagick: "convert", ffmpeg: "ffmpeg"], [], fn {sym, executable}, acc ->
+      if Pleroma.Utils.command_available?(executable) do
+        acc
+      else
+        [sym | acc]
+      end
+    end)
+  end
+
+  def image_resize(url, options) do
+    with executable when is_binary(executable) <- System.find_executable("convert"),
+         {:ok, args} <- prepare_image_resize_args(options),
+         {:ok, env} <- HTTP.get(url, [], []),
+         {:ok, fifo_path} <- mkfifo() do
+      args = List.flatten([fifo_path, args])
+      run_fifo(fifo_path, env, executable, args)
+    else
+      nil -> {:error, {:convert, :command_not_found}}
+      {:error, _} = error -> error
     end
   end
 
-  @doc "Returns a temporary path for an URI"
-  def temporary_path_for(uri) do
-    name = Path.basename(uri)
-    random = rand_uniform(999_999)
-    Path.join(System.tmp_dir(), "#{random}-#{name}")
+  defp prepare_image_resize_args(
+         %{max_width: max_width, max_height: max_height, format: "png"} = options
+       ) do
+    quality = options[:quality] || 85
+    resize = Enum.join([max_width, "x", max_height, ">"])
+
+    args = [
+      "-resize",
+      resize,
+      "-quality",
+      to_string(quality),
+      "png:-"
+    ]
+
+    {:ok, args}
   end
 
-  @doc "Stores binary content fetched from specified URL as a temporary file."
-  @spec store_as_temporary_file(String.t(), binary()) :: {:ok, String.t()} | {:error, atom()}
-  def store_as_temporary_file(url, body) do
-    path = temporary_path_for(url)
-    with :ok <- File.write(path, body), do: {:ok, path}
+  defp prepare_image_resize_args(%{max_width: max_width, max_height: max_height} = options) do
+    quality = options[:quality] || 85
+    resize = Enum.join([max_width, "x", max_height, ">"])
+
+    args = [
+      "-interlace",
+      "Plane",
+      "-resize",
+      resize,
+      "-quality",
+      to_string(quality),
+      "jpg:-"
+    ]
+
+    {:ok, args}
   end
 
-  @doc "Modifies image file at specified path by resizing to specified limit dimensions."
-  @spec mogrify_resize_to_limit(String.t(), String.t()) :: :ok | any()
-  def mogrify_resize_to_limit(path, resize_dimensions) do
-    with %Mogrify.Image{} <-
-           path
-           |> Mogrify.open()
-           |> Mogrify.resize_to_limit(resize_dimensions)
-           |> Mogrify.save(in_place: true) do
-      :ok
+  defp prepare_image_resize_args(_), do: {:error, :missing_options}
+
+  # Note: video thumbnail is intentionally not resized (always has original dimensions)
+  def video_framegrab(url) do
+    with executable when is_binary(executable) <- System.find_executable("ffmpeg"),
+         {:ok, env} <- HTTP.get(url, [], []),
+         {:ok, fifo_path} <- mkfifo(),
+         args = [
+           "-y",
+           "-i",
+           fifo_path,
+           "-vframes",
+           "1",
+           "-f",
+           "mjpeg",
+           "-loglevel",
+           "error",
+           "-"
+         ] do
+      run_fifo(fifo_path, env, executable, args)
+    else
+      nil -> {:error, {:ffmpeg, :command_not_found}}
+      {:error, _} = error -> error
     end
   end
 
-  defp rand_uniform(high) do
-    Code.ensure_loaded(:rand)
+  defp run_fifo(fifo_path, env, executable, args) do
+    pid =
+      Port.open({:spawn_executable, executable}, [
+        :use_stdio,
+        :stream,
+        :exit_status,
+        :binary,
+        args: args
+      ])
 
-    if function_exported?(:rand, :uniform, 1) do
-      :rand.uniform(high)
-    else
-      # Erlang/OTP < 19
-      apply(:crypto, :rand_uniform, [1, high])
+    fifo = File.open!(fifo_path, [:append, :binary])
+    fix = Pleroma.Helpers.QtFastStart.fix(env.body)
+    IO.binwrite(fifo, fix)
+    File.close(fifo)
+    loop_recv(pid)
+  after
+    File.rm(fifo_path)
+  end
+
+  defp mkfifo do
+    path = Path.join(System.tmp_dir!(), "pleroma-media-preview-pipe-#{Ecto.UUID.generate()}")
+
+    case System.cmd("mkfifo", [path]) do
+      {_, 0} ->
+        spawn(fifo_guard(path))
+        {:ok, path}
+
+      {_, err} ->
+        {:error, {:fifo_failed, err}}
+    end
+  end
+
+  defp fifo_guard(path) do
+    pid = self()
+
+    fn ->
+      ref = Process.monitor(pid)
+
+      receive do
+        {:DOWN, ^ref, :process, ^pid, _} ->
+          File.rm(path)
+      end
+    end
+  end
+
+  defp loop_recv(pid) do
+    loop_recv(pid, <<>>)
+  end
+
+  defp loop_recv(pid, acc) do
+    receive do
+      {^pid, {:data, data}} ->
+        loop_recv(pid, acc <> data)
+
+      {^pid, {:exit_status, 0}} ->
+        {:ok, acc}
+
+      {^pid, {:exit_status, status}} ->
+        {:error, status}
+    after
+      5000 ->
+        :erlang.port_close(pid)
+        {:error, :timeout}
     end
   end
 end