From 4a3334895dcbe0129980c96bd117bb4ac3dc2e9a Mon Sep 17 00:00:00 2001
From: Ingolf Wagner <contact@ingolf-wagner.de>
Date: Tue, 7 Nov 2023 09:02:41 +0100
Subject: [PATCH] add some video component

---
 nixos/components/media/default.nix         |   1 +
 nixos/components/media/sanitize_folder.sh  |  20 ++++
 nixos/components/media/video.nix           | 119 +++++++++++++++++++++
 nixos/machines/cream/configuration.nix     |   1 -
 nixos/machines/sternchen/configuration.nix |   1 -
 nixos/machines/sterni/configuration.nix    |   1 -
 nixos/modules/default.nix                  |   2 +-
 nixos/modules/programs/video.nix           |  25 +++++
 8 files changed, 166 insertions(+), 4 deletions(-)
 create mode 100644 nixos/components/media/sanitize_folder.sh
 create mode 100644 nixos/components/media/video.nix

diff --git a/nixos/components/media/default.nix b/nixos/components/media/default.nix
index 5de2f67..95681a1 100644
--- a/nixos/components/media/default.nix
+++ b/nixos/components/media/default.nix
@@ -8,6 +8,7 @@ with lib;
   imports = [
     ./icecast.nix
     ./tts.nix
+    ./video.nix
   ];
 
   config = mkIf config.components.media.enable { };
diff --git a/nixos/components/media/sanitize_folder.sh b/nixos/components/media/sanitize_folder.sh
new file mode 100644
index 0000000..0e75166
--- /dev/null
+++ b/nixos/components/media/sanitize_folder.sh
@@ -0,0 +1,20 @@
+#! /bin/bash
+
+# todo : add a dry-run
+
+sanitize() {
+  shopt -s extglob;
+
+  filename=$(basename "$1")
+  directory=$(dirname "$1")
+
+  filename_clean="${filename//+([^[:alnum:]_-\\.])/_}"
+
+  if (test "$filename" != "$filename_clean")
+  then
+    mv -v --backup=numbered "$1" "$directory/$filename_clean"
+  fi
+}
+
+export -f sanitize
+find $1 -depth -exec bash -c 'sanitize "$0"' {} \;
diff --git a/nixos/components/media/video.nix b/nixos/components/media/video.nix
new file mode 100644
index 0000000..b9794de
--- /dev/null
+++ b/nixos/components/media/video.nix
@@ -0,0 +1,119 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+
+  # Lassulus streaming setup
+  # -------------------------
+  # ffmpeg \
+  #   -f pulse \
+  #   -i default \
+  #   -vaapi_device /dev/dri/renderD128 \
+  #   -f x11grab \
+  #   -video_size 1366x768 \
+  #   -i :0 \
+  #   -vf 'hwupload,scale_vaapi=format=nv12' \
+  #   -c:v h264_vaapi \
+  #   -c:a aac \
+  #   -b:a 96k \
+  #   -af "highpass=f=200, lowpass=f=3000" \
+  #   -qp 30 \
+  #   -f flv \
+  #   rtmp://lassul.us:1935/stream/nixos \
+  #   ./rc3-output-$(date +%d%H%M%S).mp4
+  #
+  # Dann abspielen mit :
+  # mpv rtmp://lassul.us:1935/stream/nixos
+
+  # show keyboard input on desktop for screencasts
+  screenKey = pkgs.symlinkJoin {
+    name = "screen-keys";
+    paths =
+      let
+        screenKeyScript = { position ? "bottom", size ? "small", ... }:
+          pkgs.writeShellScriptBin "screenkeys-${position}-${size}" # sh
+            ''
+              ${pkgs.screenkey}/bin/screenkey \
+                                --no-detach \
+                                --bg-color '#fdf6e3' \
+                                --font-color '#073642' \
+                                -p ${position} \
+                                -s ${size} \
+                                "$@"
+            '';
+      in
+      lib.flatten (lib.flip map [ "large" "small" "medium" ] (size:
+        lib.flip map [ "top" "center" "bottom" ]
+          (position: screenKeyScript { inherit size position; })));
+  };
+
+
+  mpvReview =
+    let
+      moveToDir = key: dir: pkgs.writeText "move-with-${key}.lua" ''
+        tmp_dir = "${dir}"
+
+        function move_current_track_${key}()
+          track = mp.get_property("path")
+          os.execute("mkdir -p '" .. tmp_dir .. "'")
+          os.execute("mv '" .. track .. "' '" .. tmp_dir .. "'")
+          print("moved '" .. track .. "' to " .. tmp_dir)
+          mp.command("playlist-next")
+        end
+
+        mp.add_key_binding("${key}", "move_current_track_${key}", move_current_track_${key})
+      '';
+      delete = moveToDir "D" "./.graveyard";
+      good = moveToDir "G" "./.good";
+    in
+    pkgs.writers.writeDashBin "mpv-review" ''
+      exec ${pkgs.mpv}/bin/mpv --no-config --script=${delete} --script=${good} "$@"
+    '';
+
+  alphaSafe = pkgs.writers.writeBashBin "alpha-safe" ''
+    export PATH=${pkgs.gnused}/bin:$PATH
+    echo "$1" | sed 's/[^a-zA-Z0-9]/-/g' | sed 's/--/-/g' | sed 's/-$//g'
+  '';
+
+  sanitizeFolder = pkgs.writers.writeBashBin "sanitize-folder" (fileContents ./sanitize_folder.sh);
+
+in
+{
+
+  options.components.media.video.enable = mkOption {
+    type = lib.types.bool;
+    default = config.components.media.enable;
+  };
+
+  config = mkIf (config.components.media.video.enable) {
+
+    environment.systemPackages = with pkgs; [
+      unstable.youtube-dl
+      unstable.yt-dlp
+      mplayer
+      mpv
+      mpvReview
+
+      # sanitazion
+      alphaSafe
+      sanitizeFolder
+
+
+
+      # to record your screen
+      # ---------------------
+      simplescreenrecorder
+      screenKey
+      obs-studio
+
+      # to transcode video material
+      # ---------------------------
+      handbrake
+      ffmpeg-full
+
+
+    ];
+  };
+}
+
diff --git a/nixos/machines/cream/configuration.nix b/nixos/machines/cream/configuration.nix
index e61faa7..f00348a 100644
--- a/nixos/machines/cream/configuration.nix
+++ b/nixos/machines/cream/configuration.nix
@@ -73,7 +73,6 @@
     };
   };
 
-  programs.custom.video.enable = false;
   programs.custom.steam.enable = true;
   services.printing.enable = true;
 
diff --git a/nixos/machines/sternchen/configuration.nix b/nixos/machines/sternchen/configuration.nix
index 57c1d83..b2f3322 100644
--- a/nixos/machines/sternchen/configuration.nix
+++ b/nixos/machines/sternchen/configuration.nix
@@ -45,7 +45,6 @@
   };
 
   programs.custom.steam.enable = false;
-  programs.custom.video.enable = false;
 
   # keyboard fiddling
   i18n.defaultLocale = "de_DE.UTF-8";
diff --git a/nixos/machines/sterni/configuration.nix b/nixos/machines/sterni/configuration.nix
index 48b8678..8e86ead 100644
--- a/nixos/machines/sterni/configuration.nix
+++ b/nixos/machines/sterni/configuration.nix
@@ -27,7 +27,6 @@
   users.users.mainUser.extraGroups = [ "adbusers" "video" ];
 
   programs.custom.steam.enable = false;
-  programs.custom.video.enable = false;
   services.printing.enable = false;
 
   services.nginx.enable = true;
diff --git a/nixos/modules/default.nix b/nixos/modules/default.nix
index 0a36464..38e6f66 100644
--- a/nixos/modules/default.nix
+++ b/nixos/modules/default.nix
@@ -28,7 +28,7 @@
     ./programs/steam.nix
     #./programs/taskwarrior.nix
     ./programs/urxvt.nix
-    ./programs/video.nix
+    #./programs/video.nix
     ./programs/vim.nix
     ./programs/xterm.nix
 
diff --git a/nixos/modules/programs/video.nix b/nixos/modules/programs/video.nix
index e8ad397..fda7bd8 100644
--- a/nixos/modules/programs/video.nix
+++ b/nixos/modules/programs/video.nix
@@ -50,6 +50,29 @@ let
           (position: screenKeyScript { inherit size position; })));
   };
 
+
+  mpvReview =
+    let
+      moveToDir = key: dir: pkgs.writeText "move-with-${key}.lua" ''
+        tmp_dir = "${dir}"
+
+        function move_current_track_${key}()
+          track = mp.get_property("path")
+          os.execute("mkdir -p '" .. tmp_dir .. "'")
+          os.execute("mv '" .. track .. "' '" .. tmp_dir .. "'")
+          print("moved '" .. track .. "' to " .. tmp_dir)
+        end
+
+        mp.add_key_binding("${key}", "move_current_track_${key}", move_current_track_${key})
+      '';
+      delete = moveToDir "D" "./.graveyard";
+      good = moveToDir "G" "./.good";
+    in
+    pkgs.writers.writeDashBin "mpv-review" ''
+      exec ${pkgs.mpv}/bin/mpv --no-config --script=${delete} --script=${good} "$@"
+    '';
+
+
 in
 {
 
@@ -61,6 +84,8 @@ in
       unstable.yt-dlp
       mplayer
       mpv
+      mpvReview
+
 
       # to record your screen
       # ---------------------