Yep. Writing myself a little plug-in to make my Remote Wonder work when playing DVDs with Media Player Classic.
MPC is OLE compliant, so you can send it commands like
PostMessage( hMediaPlayerClassic, WM_COMMAND, ID_NAVIGATE_ROOTMENU );
The standard VCR/DVD fast-forward/fast-reverse commands are possible by repeatedly sending one of the seek messages you see below. I’ve reserved holding down the remote control button for ID_PLAY_SEEKxWARDSMALL. So one button press to seek medium speed, two button presses to seek fast, and hold to seek slow.
Without further ado
procedure seek_spam( hWin: HWND; msg: integer; dwData: DWORD; r_esult: LRESULT ); stdcall;
// function
// Repeatedly trigger the mpc Seek command at exactly the speed that mpc
// can respond to its message queue without locking the plug-in's
// process.
//
// Consider:
// - No system TIMER object resources are consumed.
// - MPC's message queue will not be overflowed.
// - The remote control buttons are instantly responsive to the user's
// input. The user will not have to wait for backlogged key events to
// exhaust themselves before acting on new commands.
//
// Win32 API SendMessageCallback() returns immediately like PostMessage(),
// yet still informs the poster that the target has read the message by
// means of a callback. To make life interesting, the callback function
// is the sending function: *this* function. Because of the non-blocking
// nature of the call, this doesn't cause a call-stack overload. Also,
// since the system won't call two different functions in the same thread
// at the same time, there is no need for a semaphore or other monitor on
// the exit variable (seek_speed). Neat, huh?
//
// What that means is that an infinite loop is possible if the proper
// exit conditions (which are external to this function) are removed!!!
//
// Exit conditions are:
// 1. HandleKey().post() is called
// 2. seek_speed is one of 2 or -2 when entering the RMCTRL_FF/RW
// switch below in the HandleKey() function body.
//
// arguments
// hWin Must be the handle to the mpc window (hMediaPlayerClassic).
// ... All other arguments are ignored.
//
begin
case seek_speed of
-2: SendMessageCallback( hWin, WM_COMMAND, ID_PLAY_SEEKBACKWARDLARGE,
0, @seek_spam, 0 );
-1: SendMessageCallback( hWin, WM_COMMAND, ID_PLAY_SEEKBACKWARDMED,
0, @seek_spam, 0 );
0: ;
1: SendMessageCallback( hWin, WM_COMMAND, ID_PLAY_SEEKFORWARDMED,
0, @seek_spam, 0 );
2: SendMessageCallback( hWin, WM_COMMAND, ID_PLAY_SEEKFORWARDLARGE,
0, @seek_spam, 0 )
end
end;
If you understand why this is so cool, then you’re a super-geek. Honorary pocket protector to you!
If enough people actually care and want to know why this is cool, I’ll tell you later…
