Date: Wed, 3 Feb 1999 20:27:46 +0100 From: Andre Albsmeier <andre.albsmeier@mchp.siemens.de> To: freebsd-multimedia@FreeBSD.ORG Subject: Patch to fxtv to cancel channel swithing noise Message-ID: <19990203202746.A10589@internal>
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Running fxtv on my Hauppauge TV card works relly nice (thanks to all
who made this possible), but has a small thing that really bothers me:
When changing channels, there is a loud, sharp noise being produced
which really could damage my speakers if I have set the volume to a high
level before. I have made a small patch to fxtv which mutes the audio
output, switches the channels, waits a little until the noise has settled,
and unmutes audio again.
I agree that this is a hack, but hey, it works and maybe someone wants
to use it. (If there are better solutions, tell me).
FYI, this is the card:
bktr0 <BrookTree 878> rev 2 int a irq 11 on pci0:12:0
Hauppauge WinCast/TV, Philips PAL I tuner, msp3400c stereo, remote control.
Detected a MSP3410D-B4
-Andre
--- tvcapture.c.ORI Sat Jan 30 21:17:12 1999
+++ tvcapture.c Sat Jan 30 21:33:13 1999
@@ -587,15 +587,17 @@
return;
}
+ if( ! (old_audio & AUDIO_MUTE) )
+ TVCAPTURESetAudioMute( c, TRUE );
+
if ( ioctl( c->tfd, TVTUNER_SETCHNL, &larg ) < 0 ) {
DO_IOCTL_SERR( "TVTUNER_SETCHNL", larg );
return;
}
c->tuner_chan_active = TRUE;
- old_audio &= AUDIO_MUTE;
- if ( old_audio )
- TVCAPTURESetAudioMute( c, TRUE );
+ usleep(500000);
+ TVCAPTURESetAudioMute( c, old_audio & AUDIO_MUTE ? TRUE : FALSE );
}
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