Add LTX2 Condition Pipeline (#13058)
* LTX2 condition pipeline initial commit
* Fix pipeline import error
* Implement LTX-2-style general image conditioning
* Blend denoising output and clean latents in sample space instead of velocity space
* make style and make quality
* make fix-copies
* Rename LTX2VideoCondition image to frames
* Update LTX2ConditionPipeline example
* Remove support for image and video in __call__
* Put latent_idx_from_index logic inline
* Improve comment on using the conditioning mask in denoising loop
* Apply suggestions from code review
Co-authored-by: Álvaro Somoza <asomoza@users.noreply.github.com>
* make fix-copies
* Migrate to Python 3.9+ style type annotations without explicit typing imports
* Forward kwargs from preprocess/postprocess_video to preprocess/postprocess resp.
* Center crop LTX-2 conditions following original code
* Duplicate video and audio position ids if using CFG
* make style and make quality
* Remove unused index_type arg to preprocess_conditions
* Add # Copied from for _normalize_latents
* Fix _normalize_latents # Copied from statement
* Add LTX-2 condition pipeline docs
* Remove TODOs
* Support only unpacked latents (5D for video, 4D for audio)
* Remove # Copied from for prepare_audio_latents
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Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>
Co-authored-by: Álvaro Somoza <asomoza@users.noreply.github.com>
