This patch adds prefetch buffering to the sequencer
(see the tracker for additional details:
https://projects.blender.org/tracker/?func=detail&aid=7307&group_id=9&atid=127
)
We create seperate render threads (currently one, because of the fact,
that sequence rendering modifies global structures...), that
render up to the defined userpref value "Prefetch frames" in advance.
(Pressing Alt-A will _first_ fill the buffer and then start playing.)
Bassam and I did some extensive testing, so it should work.
If you don't configure your number of prefetch frames, prefetching is disabled!
(Sane defaults... :)
Also: if the machine is definitely too slow and runs out of the prefetch
area, prefetching is disabled automatically and we are back to good old
frame skipping mode.
My Dual Athlon is able to handle 4 parallel DV streams at once (sometimes
a little bit choppy, but prefetching is never disabled!)
I fixed also a long standing bug in the audio code, that made playback run
backwards at the beginning...
Added patch by Matt Ebb, that enhances the sequencer GUI in several ways:
- It looks a lot better
- Strip colours are themeable.
- The drawing code is more readable.
- The background of the timeline makes now distinguishing the channels easier
by alternating between different shades of gray.
- Handle-scaling is clamped to min and max-values, making it possible to
grab strips at large zooming levels more easily.
- Preview-images can be panned by dragging it with the middle mouse button.
Home-Key resets the position.
- Since some people can't grab the meaning of "C 0", it is renamed to "Chan: 0"
- Effect strips have slightly different colors to distinguish them better.
Additionally:
- fixed an off by one error in Matt's patch
- Scene-rendering saves CFRA to avoid jumping current-scene on scrub
(might be academic fix, since most likely it only happens if you add
the sequencer-scene to the timeline... But nevertheless it bugs you on
testing the GUI ;-)
Optimized so only samples inside the screens bounds are drawn.
Wave display detail is based on zoom - so you can view realy large wave files as well as indervidual samples.
Changed logic so an approximation of the wave is displayed rather then just the symetrical amplitude of the sound.
Triangles at start and end were annoying and obscured the start of the sound. made them alpha 0.7 for sound clips only.
a whole CD of music should display well and zoom smoothly now.
- drawXXXspace, changeXXXspace, and winqreadXXXspace now receive the area
and spacedata as explicit arguments, allowing them to access private
data w/o going through globals.
- pass the new BWinEvent through to the winqreadXXXspace, allowing future
access to extended event data.
Removed direct calls to winqreadXXXspace to simulate user actions, replaced
by calls to action functions in edit.c or the appropriate handler.
(adding)
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
also the Makefile.in's were from previous patch adding
the system depend stuff to configure.ac
Kent
--
mein@cs.umn.edu
