2002-08-02 11:23:05 +00:00
|
|
|
OUTDATED
|
|
|
|
|
--------
|
|
|
|
|
|
2001-01-13 19:04:18 +00:00
|
|
|
|
|
|
|
|
case 1)
|
|
|
|
|
|
|
|
|
|
(--------------------------------------------------)
|
|
|
|
|
! bin !
|
|
|
|
|
! (--------) (--------) (--------) !
|
|
|
|
|
! ! fakesrc! !identity! !fakesink! !
|
|
|
|
|
! ! 1 src ----- sink 1 src ---- sink 1 ! !
|
|
|
|
|
! (--------) (--------) (--------) !
|
|
|
|
|
! !
|
|
|
|
|
! (--------) (--------) (--------) !
|
|
|
|
|
! !fakesrc ! !identity! !fakesink! !
|
|
|
|
|
! ! 2 src ----- sink 2 src ---- sink 2 ! !
|
|
|
|
|
! (--------) (--------) (--------) !
|
|
|
|
|
(--------------------------------------------------)
|
|
|
|
|
|
|
|
|
|
just two scheduled chains in a single bin.
|
|
|
|
|
|
|
|
|
|
.scheduling.
|
|
|
|
|
|
|
|
|
|
we have two chains here fs1-i1-fsk1 and fs2-i2-fsk2
|
|
|
|
|
fakesrc1 will output 1 buffer, fakesrc2 3 buffers
|
|
|
|
|
|
|
|
|
|
.eos.
|
|
|
|
|
|
|
|
|
|
fs1 will return a NULL buffer on EOS. the scheduler
|
|
|
|
|
detects the NULL buffer and puts chain1 in EOS so that it
|
|
|
|
|
doesn't get scheduled again. The scheduler fires the EOS
|
|
|
|
|
signal for all the elements in the chain and puts the fs1
|
|
|
|
|
element in the READY state.
|
|
|
|
|
|
|
|
|
|
the same procedure happens for chain2. At that point, the bin
|
|
|
|
|
has no chains to schedule and so it fires EOS.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
case 2)
|
|
|
|
|
|
|
|
|
|
(---------------------------------------------------)
|
|
|
|
|
! bin !
|
|
|
|
|
! (--------) (--------) (---------) !
|
|
|
|
|
! ! disksrc! ! mpg123 ! !audiosink! !
|
|
|
|
|
! ! 1 src ----- sink 1 src ---- sink 1 ! !
|
|
|
|
|
! (--------) (--------) (---------) !
|
|
|
|
|
! !
|
|
|
|
|
! (--------) (--------) (---------) !
|
|
|
|
|
! !disksrc ! ! mpg123 ! !audiosink! !
|
|
|
|
|
! ! 2 src ----- sink 2 src ---- sink 2 ! !
|
|
|
|
|
! (--------) (--------) (---------) !
|
|
|
|
|
(---------------------------------------------------)
|
|
|
|
|
|
|
|
|
|
same as case 1, an mp3 mixer where the mixing is performed
|
|
|
|
|
in hardware (in the audiosink).
|
|
|
|
|
we want to show how the EOS state can be undone.
|
|
|
|
|
|
|
|
|
|
.scheduling.
|
|
|
|
|
|
|
|
|
|
we have two chains here ds1-mpg1-ask1 and ds2-mpg2-ask2
|
|
|
|
|
the song in chain1 is about to end, chain2 has just begun
|
|
|
|
|
playing a song.
|
|
|
|
|
|
|
|
|
|
.eos.
|
|
|
|
|
|
|
|
|
|
fs1 will return a NULL buffer on EOS. the scheduler
|
|
|
|
|
detects the NULL buffer and puts chain1 in EOS so that it
|
|
|
|
|
doesn't get scheduled again. The scheduler fires the EOS
|
|
|
|
|
signal for all the elements in the chain and puts the fs1
|
|
|
|
|
element in the READY state.
|
|
|
|
|
|
|
|
|
|
the app sets the new location for the disksrc. The element is
|
|
|
|
|
put in the PLAYING state, the chain is marked !EOS so that
|
|
|
|
|
it will be scheduled again.
|
|
|
|
|
|
|
|
|
|
|
