Since updating all input values per sample could be performance costly,
we now only update inputs that are either keyframing or connected to
another node
This mostly builds on the keyframing we already set up for video, but the
audio renderer will now appropriately updated keyframe inputs per sample in
accordance with keyframe values.
Since EmitCachedFrameReady() makes a copy of the texture, we can economize a lot
by re-using the same copied texture for all the times rather than making a
separate copy for each time.
The encoder was moved to its own thread and will transcode the PCM from the
audio renderer into the chosen codec while the video frames are still
received. The implementation isn't perfect and could use some cleaning up, but
it is functional at the moment.
Sending a texture directly from the texture cache is dangerous since once the
reference is relinquished, it could be picked up and used by another thread.
Copying the texture to a separate one takes a little extra time but lets the
viewer remain in control of that texture.
Various backend improvements are included in this commit, mostly for the
benefit of exporting. These include:
- Moving more non-GL code from OpenGL derivatives into base classes
- An "export mode" that changes the cache behavior of video backends
- Using the Viewer's UUID introduced a few commits ago
- No longer hardcoding the pixel format/render mode in the backend (since
they'll inevitably differ when exporting vs previewing)
- Improved signalling for frames that are completed
To aid generating a cache ID, each viewer node needs a UUID. Previous iterations
tried to hash a name and time, but a UUID is a much more efficient way to do
this.
With differently set speeds, these functions would mess with the timing in ways
that would be confusing to the user. Now they act in a much more intuitive way
and also prevent negative media times.
OCIO config was set on a per-project basis, but we were using a singleton for
the ColorManager that would break if more than one project was ever open.
Now the ColorManager belongs to the Project and is always accessed through the
Project.
This commit adds the background functionality of the render cache invalidating
whenever a footage's color space is changed. This includes when the project's
configuration is changed as well.
Uniform values cannot be set if the shader is not bound, and calling Blit would
release the shader making subsequent iteration count updates not work. This
commit makes sure the shader is bound before trying to do so.
Ultimately it would be nice if nodes could configure this themselves, but
CLAMP_TO_BORDER behavior can be written manually into the shader if that
behavior is desired, whereas CLAMP_TO_EDGE cannot.
Creating and destroying textures is a slow process, particularly when we can
re-use them throughout most of the render chain. We now keep them stored so
they can be re-used which improves performance substantially.
This was many changes that were largely fundamentally related. They included:
- More const modifiers to enforce read only node graphs
- Support for fragment and vertex shaders from the nodes
- Support for node code loaded externally (embedded into the binary)
- Fixed issue preventing two textures from being used in a shader
- Removed several unused functions and cleaned up code
- Fixed video media node misreading its matrix input
itsmattkc