Re: [Rhythmbox-devel] Re: Crossfading Support?

[Benjamin Otte <in7y118 public uni-hamburg de>]

You also want timestamps to work correctly (for the time display), make
seeking on fade work and stuff like that. The basics are quite simple but
after that it gets eeeevil :)

Benjamin


On Sat, 8 Nov 2003, Mike Hearn wrote:

> I looked into this a bit a few weeks ago. Basically:
>
> * We'd need to write a new crossfader element. It has two input pads, one
> output pad. Rhythmbox sets up and maintains TWO pipelines at once, feeding
> into the crossfader. IE the crossfader element would be compulsory, not
> optional without major hackage inside RB - that doesn't mean you have to
> have the effect enabled though.
>
> * The crossfader element would pull N seconds of audio into itself and
> then have two internal volume elements and an adder element. You could use
> the sine function to splice between them, which is easy enough, the hard
> bit is pulling the right amount of audio I think. GStreamer 0.7 supports
> querying a buffer for its duration.
>
> * We could also use this element to implement gapless playback as it'd
> buffer a small amount on the alternate pipeline before doing the switch.
> Once the switch between the pads has occurred, the element could emit a
> signal that RB would attach to and rejig the pipelines.
>
> * Maybe a weekend or twos work. Unfortunately I am already committed to
> too much stuff elsewhere in linuxland, so I can't do this....
>
> thanks -mike
>
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