I've got an Arduino with an LCD. Previously I developed a Python application which connected via serial and showed songs playing and let me change the track and volume through the magic of CMUS. CMUS is a wonderful music program, for *NIX systems. If you are trapped in a Windows environment you might use VLC. With CMUS you can connect via "cmus-remote" and query the tracks accessing the necessary information. With VLC no such feature is available. I was able to get my display information by looking at the window titles using a modification of the post on StackOverflow:
http://stackoverflow.com/questions/14653168/get-hwnd-of-each-window-python
I've put it in a function and modified it slightly from the post.
def getWindowsTitles():
EnumWindows = ctypes.windll.user32.EnumWindows
EnumWindowsProc = ctypes.WINFUNCTYPE(ctypes.c_bool, ctypes.POINTER(ctypes.c_int), ctypes.POINTER(ctypes.c_int))
GetWindowText = ctypes.windll.user32.GetWindowTextW
GetWindowTextLength = ctypes.windll.user32.GetWindowTextLengthW
IsWindowVisible = ctypes.windll.user32.IsWindowVisible
titles = []
def foreach_window(hwnd, lParam):
if IsWindowVisible(hwnd):
length = GetWindowTextLength(hwnd)
buff = ctypes.create_unicode_buffer(length + 1)
GetWindowText(hwnd, buff, length + 1)
titles.append(buff.value)
return True
EnumWindows(EnumWindowsProc(foreach_window), 0)
return titles
This works fine for reading the Artist and Song if one is playing, but that doesn't let us change the track.
I tried several things to send input to VLC, but to no avail. Several input libraries wouldn't work, and I finally tried AutoHotKey. The Python Package which hooks in didn't seem to work with the current DLL, so I just made exes from the AHK scripts:
Example Next Track:
SetTitleMatchMode, RegEx
IfWinExist .*VLC media player
WinActivate
Sleep 1000
Send {Alt down}{l}
Sleep 100
Send {x}
Send {Alt up}
return
There are probably better ways of getting it work, but for now I'm content with this implementation.
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