Added padding and fixed IPC problems

video.lua

@@ -2,6 +2,8 @@ local args = { ... }
 local dfpwm = require("cc.audio.dfpwm")
 local ccpi = require("ccpi")
 
+local EV_NONCE = math.floor(0xFFFFFFFF * math.random())
+
 settings.define("video.speaker.left", {
   description = "Speaker ID for left audio channel",
   default = peripheral.getName(peripheral.find("speaker")),
@@ -86,7 +88,8 @@ if not n_frames and not video_url and not audio_url_l then
   end
 end
 
-print(string.format("Using monitor %s", peripheral.getName(monitor)))
+local mon_w, mon_h = monitor.getSize()
+print(string.format("Using monitor %s (%dx%d)", peripheral.getName(monitor), mon_w, mon_h))
 if speakers.r then
   print(string.format("Stereo sound: L=%s R=%s", peripheral.getName(speakers.l), peripheral.getName(speakers.r)))
 else
@@ -183,11 +186,11 @@ for i = 1, loading_concurrency do
 end
 
 table.insert(subthreads, function()
-  while #frames ~= n_frames or #audio_frames.l < n_audio_samples do
+  repeat
     draw_bar(ty - 3, colors.blue, colors.gray, #frames / n_frames, "Loading video [%5d / %5d]", #frames, n_frames)
     draw_bar(ty - 2, colors.red, colors.gray, #audio_frames.l / n_audio_samples, "Loading audio [%5d / %5d]", #audio_frames.l, n_audio_samples)
     os.sleep(0.25)
-  end
+  until #frames >= n_frames or #audio_frames.l >= n_audio_samples
   print()
 end)
 
@@ -208,14 +211,16 @@ table.insert(subthreads, function()
       break
     end
   end
-  os.queueEvent("playback_ready")
+  os.queueEvent("playback_ready", EV_NONCE)
 end)
 
 table.insert(subthreads, function()
   local is_dfpwm = ({ audio_url_l:find("%.dfpwm") })[2] == #audio_url_l
   local decode = use_dfpwm and dfpwm.make_decoder() or decode_s8
 
-  os.pullEvent("playback_ready")
+  repeat 
+    local _, nonce = os.pullEvent("playback_ready")
+  until nonce == EV_NONCE
 
   for i = 1, n_audio_samples do
     local buffer = decode(audio_frames.l[i])
@@ -232,7 +237,9 @@ table.insert(subthreads, function()
   local is_dfpwm = ({ audio_url_r:find("%.dfpwm") })[2] == #audio_url_r
   local decode = use_dfpwm and dfpwm.make_decoder() or decode_s8
 
-  os.pullEvent("playback_ready")
+  repeat 
+    local _, nonce = os.pullEvent("playback_ready")
+  until nonce == EV_NONCE
 
   for i = 1, n_audio_samples do
     local buffer = decode(audio_frames.r[i])
@@ -244,8 +251,9 @@ table.insert(subthreads, function()
 end)
 
 table.insert(subthreads, function()
-  os.pullEvent("playback_ready")
-
+  repeat 
+    local _, nonce = os.pullEvent("playback_ready")
+  until nonce == EV_NONCE
   local start_t = os.clock()
   while not playback_done do
     local frame = math.floor((os.clock() - start_t) / math.max(0.05, delay))
@@ -253,8 +261,11 @@ table.insert(subthreads, function()
     term.setBackgroundColor(frame >= #frames and colors.red or colors.gray)
     term.clearLine()
     term.write(string.format("Playing frame: %d/%d", frame + 1, #frames))
-    if frames[frame + 1] then
-      ccpi.draw(frames[frame + 1], 1, 1, monitor)
+    local img = frames[frame + 1]
+    if img ~= nil then
+      local x = math.max(math.floor((mon_w - img.w) / 2), 0)
+      local y = math.max(math.floor((mon_h - img.h) / 2), 0)
+      ccpi.draw(img, x, y, monitor)
     end
     os.sleep(delay)
   end