Hi Will! From: Will Heyman <heyman@xxxxxxxx> > Robert Siemer wrote: > > I'm somewhat confused about the ioctl()s after reading > > linux/Doc*/vid*/API.html. > > > > Via VIDIOCSAUDIO i can force my radio driver to mono sound. > > How did you do this? I want to force my radio driver to mono as well. > I tried: > > va.mode = VIDEO_SOUND_MONO; > ioctl (fd, VIDIOCSAUDIO, &va) > > with no results. This is the right and only approach. Maybe the driver currently does not support this. - The radio-miropcm20.c didn't, neither, but I'm rewriting it... [: > I do a > ioctl (fd, VIDIOCGAUDIO, &va) > before and after the VIDIOCSAUDIO and get the following: > > Before After > va.flags = 0 va.flags = 4 The driver changed its mind about beeing able to control the volume here... --> fucked up. [: (Or maybe it can only control it in mono mode... B-]) > va.mode = 1 va.mode = 1 It's showing VIDEO_SOUND_MONO here. This says nothing. Compare with linux/include/linux/videodev.h near line 143. - I don't know weather it changed. > What am I missing? I know the card (WinTV 401) can do mono > radio because the Windows radio application does it. I think your test program is very small. - A quote in full could be helpful. And check the driver! - You aren't using bttv.c, are you??? Last but not least - why do you think you wasn't successful and it's already mono!? Ciao, Robert
