huangdarwin 0466bd7957 Effect: Add alpha effect.
This effect can scale Alpha values.

This is needed for testing Compositor, and coincidentally was requested
by a partner in the past. This also will generally be more useful in
full multi-asset, where we may want to have one input have different alpha
values than another

Also, update fragment_shader_copy_es2.glsl to not throw away alpha values.
This means ThumbnailStripShaderProgram (the only place this glsl is used) will
consider input alpha and output alpha appropriately

PiperOrigin-RevId: 555915092
2023-08-11 20:31:21 +00:00
..
2023-08-11 20:31:21 +00:00

Effect module

Provides functionality for applying effects to video frames.

Getting the module

The easiest way to get the module is to add it as a gradle dependency:

implementation 'androidx.media3:media3-effect:1.X.X'

where 1.X.X is the version, which must match the version of the other media modules being used.

Alternatively, you can clone this GitHub project and depend on the module locally. Instructions for doing this can be found in the top level README.