Re: [xine-devel] sig* && video_out.c

[M G. <el...@al...>]

Thomas,

     These should get you up and running. I use the multimedia timer ( winmm.lib ) and a win32 event/signal to mimic the functionality of setitimer, sigalarm and pause. If you improve or fix any blundering errors, please let me know. I skimmed over the vlc code and it looks like they may have a more accurate method of retrieving time and it might be worth playing with. As for the wakeup timers resolution, we are unfortuantely limited to about ~10ms min intervals. ( seems to work alright ) Very soon ( ~ week, maybe 2 ) I will be releasing a more or less complete port of xine for win32. If you want to look at what I have sooner, let me know and I will send you a tarball. 

Hope this helps ...

-Matthew

/*
	this function returns somewhat
	accurate unix time with the date
	accurate to the first call to get
	of day and the resolution accurate
	to ~ miliseconds.
*/

static time_t startseconds = 0;

int gettimeofday( struct timeval *tp, struct timezone *tzp )
{
	MMTIME mmtime;

	// clock() returns time in miliseconds

	if( !startseconds )
		startseconds = time( 0 );

	timeGetSystemTime( &mmtime, sizeof( mmtime ) );      

	tp->tv_sec	= ( mmtime.u.ms / 1000 ) + startseconds;
	tp->tv_usec	= ( mmtime.u.ms % 1000 ) * 1000;

	return 0;
};

/*
	These functions are designed to mimick
	a subset of itimer for use with an 
	alarm signal on win32. This is just
	enough to get xine up and running.
*/

static HANDLE sigalarm = 0;

int setitimer( int which, struct itimerval * value, struct itimerval *ovalue )
{
	long int miliseconds;
		
	if( !sigalarm )
		sigalarm = CreateEvent( 0, FALSE, TRUE, "SIGALARM" );

    miliseconds = value->it_value.tv_usec / 1000;

	timeSetEvent( miliseconds, 0, ( LPTIMECALLBACK ) sigalarm, 0, TIME_PERIODIC | TIME_CALLBACK_EVENT_PULSE );

	return 0;
}

/*
	Wait for sigalarm to wake the thread
*/

int pause( void )
{
	WaitForSingleObject( sigalarm, INFINITE );

	return 0;
}


On Sun, 13 January 2002, Thomas Fjellstrom wrote:

> 
> On January 13, 2002 01:27 am, you wrote:
> > Hello,
> >
> >      I have a mostly complete port of xine to win32. I am doing mostly bug
> > fixes and gui work at the moment. Most of the problems you will encounter I
> > most likely have already created solutions for. Although I am not using the
> > ming32 compiler ( msvc ) I am using pthreads and a few packages from the
> > cygwin project. I also have working directx plugins for both video ( ddraw
> > ) and audio ( dsound ). Are you interested in sharing code?
> >
> 
> Yes very much so, but i fear my bits to share won't be that interesting, so 
> far I have a video and sound driver that uses Allegro (http://alleg.sf.net), 
> and some changes so it actually compiles with the msvcrt.dll version of 
> mingw32. Also we are using pthreads, and the only real problem a this moment 
> is what to do in place of the sig* functions.
> 
> -- 
> Thomas Fjellstrom
> tfj...@sh...
> http://strangesoft.net


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