From 2bbc7df77ee930d58916584499c63a8779cc7896 Mon Sep 17 00:00:00 2001
From: Klesh Wong <klesh@qq.com>
Date: Sun, 28 Aug 2022 11:00:55 +0800
Subject: [PATCH] refactor: extract virtcam cache_dir as constant

---
 gui/virtcam/httpserver.lua |  2 +-
 gui/virtcam/virtcam.lua    | 17 ++++++++++++-----
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/gui/virtcam/httpserver.lua b/gui/virtcam/httpserver.lua
index 95c2697..06fc437 100644
--- a/gui/virtcam/httpserver.lua
+++ b/gui/virtcam/httpserver.lua
@@ -10,7 +10,7 @@ local http_server = require "http.server"
 local http_headers = require "http.headers"
 local json = require "JSON"
 
-function NewHttpServer(host, port, handlers)
+local function NewHttpServer(host, port, handlers)
     local function reply(myserver, stream) -- luacheck: ignore 212
         -- Read in headers
         local req_headers = assert(stream:get_headers())
diff --git a/gui/virtcam/virtcam.lua b/gui/virtcam/virtcam.lua
index 6f3288a..5aa4415 100644
--- a/gui/virtcam/virtcam.lua
+++ b/gui/virtcam/virtcam.lua
@@ -1,4 +1,5 @@
 local httpserver = require "httpserver"
+local CACHE_DIR = "~/Videos/virtcam"
 
 local function run(cmd)
     print(cmd)
@@ -9,6 +10,7 @@ end
 
 run("sudo modprobe v4l2loopback -r -f")
 run("sudo modprobe v4l2loopback video_nr=21 card_label=virtcam exclusive_caps=1")
+run("mkdir -p " .. CACHE_DIR)
 
 Ffmpeg = { cmd = "", proc = nil, name = "", started = false }
 
@@ -45,12 +47,13 @@ Actualcam = Ffmpeg:new {
 
 Recorder = Ffmpeg:new {
     name = "recorder",
-    cmd = "ffmpeg -y -i /dev/video21 ~/Video/seq.mp4",
+    cmd = "ffmpeg -y -i /dev/video21 " .. CACHE_DIR .. "/seq.mp4",
 }
 
 Looper = Ffmpeg:new {
     name = "looper",
-    cmd = "ffmpeg -re -stream_loop -1 -i ~/Video/loop.mp4 -f v4l2 -vcodec rawvideo -pix_fmt yuyv422 -framerate 30 /dev/video21 ",
+    cmd = "ffmpeg -re -stream_loop -1 -i " ..
+        CACHE_DIR .. "/loop.mp4 -f v4l2 -vcodec rawvideo -pix_fmt yuyv422 -framerate 30 /dev/video21 ",
 }
 
 
@@ -70,7 +73,7 @@ end
 
 local stage = "stopped"
 
-NewHttpServer("127.0.0.1", 10200, {
+httpserver.NewHttpServer("127.0.0.1", 10200, {
     ["POST /prepare"] = function(_, _)
         if stage == "stopped" then
             -- run("pactl set-source-mute @DEFAULT_SOURCE@ 1")
@@ -92,8 +95,12 @@ NewHttpServer("127.0.0.1", 10200, {
             Recorder:start()
             run("sleep 3")
             Recorder:stop()
-            run("ffmpeg -y -i ~/Video/seq.mp4 -vf reverse ~/Video/reversed.mp4")
-            run("ffmpeg -y -i ~/Video/seq.mp4 -i ~/Video/reversed.mp4 -filter_complex '[0:v] [1:v] concat=n=2:v=1 [v]' -map '[v]' ~/Video/loop.mp4")
+            run("ffmpeg -y -i " .. CACHE_DIR .. "/seq.mp4 -vf reverse " .. CACHE_DIR .. "/reversed.mp4")
+            run("ffmpeg -y -i " ..
+                CACHE_DIR ..
+                "/seq.mp4 -i " ..
+                CACHE_DIR ..
+                "/reversed.mp4 -filter_complex '[0:v] [1:v] concat=n=2:v=1 [v]' -map '[v]' " .. CACHE_DIR .. "/loop.mp4")
             run_only(Looper)
             stage = "fake"
         end