Bugfixes and enhancements

Enhancements

• The frame numbers in blender where boosted from Short-Int to Int to make it possible to edit videos longer than a few minutes.
• A channel tuner was added to the bottom of the sequencer preview labeled "C 0". Track 0 is special and shows the output. This way, you can watch each track on several control monitors. You most likely want a monitor for each input and one large output monitor. This is a plessure with Blender's non-overlapping UI.
• The former version calculated every track - even those that are never shown or hidden by other tracks. We now first build a dependency tree and then only calculate those imbufs that are needed for the final result.
• Most of the sequencer plugins used on a regular basis only need to calculate one input if you put the fade to an extremal position. (Like 0 or 1). These are CROSS, GAMMA CROSS and WIPE.
• We do this by only copying pointers around. This was accomplished by adding the feature of reference counting to imbufs. This is what IMB_refImBuf() is for.
• The IPOs of effect-strips can be locked to the global framecounter. On long running timelines with faders between them, this is a real life-safer. (The old IPOs could only run from 0 to 100). You have to click on "IPO Frame locked" to activate this.
• The plugin interface now supports per instance data for effect plugins. This made the port of the "dynamic noise reduction" plugin from VirtualDub possible.

Bugfixes

• The old sequencer sometimes got the ordering of the rendered tracks wrong and tried to use results never calculated resulting in very obscure segfault situations.
• The code was cleaned up a little bit. The former code did a lot of things encapsulated in one function of several pages length thereby obscuring the code a lot.
• You can add audio tracks to meta-strips. If you edit the meta-strip you will only hear the audio tracks, that are included in there. This can come very handy!