On 10 Dec 2000, Gerd Knorr wrote: > > I have breifly read Alan's V4L 1 specs and sparcely read over the > > bttv-driver.c and msp3400.c files from 0.7.50. I am only guessing that > > the msp needs to know to switch to a different input? > Might be, depends on how the card is designed. One possible way is to > route the external jack throuth the msp34xx's scart input. Another is > to connect an audio mux to some of the GPIO pins of the bt848/878 chip. > > But how is that signalled? > AUDC_SET_INPUT > Gerd Thanks for the pointers Gerd. I looked at AUDC_SET_INPUT in msp3400.c and see it being called sometimes (sometimes not because of MUTE being set in bttv-driver.c so it is not called) to switch to AUDIO_EXTERN. But that does not seem to do it, even when it _is_ called. So I played substitute and tried IN1-4 in scarts array 0 and IN1 in array 1. All these within the msp_command fnx when AUDIO_EXTERN was called. Nothing would stop the TV channel from being transmitted :(. So would this suggest it is possibly setup as your second thought above? That it may connect the audio mux to some of the GPIO pins of the bt848/878 chip? If so, where would you suggest I be looking for that? Or is it even possible in the current drivers? thanks, JES -- James B. MacLean macleajb@xxxxxxxxxxx Department of Education http://www.ednet.ns.ca/~macleajb Nova Scotia, Canada B3M 4B2
