diffusers

07c9a08e - Add `timestep_spacing` and `steps_offset` to schedulers (#3947)

Add `timestep_spacing` and `steps_offset` to schedulers (#3947) * Add timestep_spacing to DDPM, LMSDiscrete, PNDM. * Remove spurious line. * More easy schedulers. * Add `linspace` to DDIM * Noise sigma for `trailing`. * Add timestep_spacing to DEISMultistepScheduler. Not sure the range is the way it was intended. * Fix: remove line used to debug. * Support timestep_spacing in DPMSolverMultistep, DPMSolverSDE, UniPC * Fix: convert to numpy. * Use sched. defaults when instantiating from_config For params not present in the original configuration. This makes it possible to switch pipeline schedulers even if they use different timestep_spacing (or any other param). * Apply suggestions from code review Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com> * Missing args in DPMSolverMultistep * Test: default args not in config * Style * Fix scheduler name in test * Remove duplicated entries * Add test for solver_type This test currently fails in main. When switching from DEIS to UniPC, solver_type is "logrho" (the default value from DEIS), which gets translated to "bh1" by UniPC. This is different to the default value for UniPC: "bh2". This is where the translation happens: https://github.com/huggingface/diffusers/blob/36d22d0709dc19776e3016fb3392d0f5578b0ab2/src/diffusers/schedulers/scheduling_unipc_multistep.py#L171 * UniPC: use same default for solver_type Fixes a bug when switching from UniPC from another scheduler (i.e., DEIS) that uses a different solver type. The solver is now the same as if we had instantiated the scheduler directly. * do not save use default values * fix more * fix all * fix schedulers * fix more * finish for real * finish for real * flaky tests * Update tests/pipelines/stable_diffusion/test_stable_diffusion_pix2pix_zero.py * Default steps_offset to 0. * Add missing docstrings * Apply suggestions from code review --------- Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>