32 lines
979 B
C++
32 lines
979 B
C++
#pragma once
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#include <cstdint>
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#include <expected>
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#include <string>
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#include <vector>
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namespace kimodo::detail {
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struct diffusion_schedule {
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std::vector<std::uint32_t> use_timesteps;
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std::vector<float> alpha_cumprod;
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std::vector<float> alpha_cumprod_prev;
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};
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std::expected<diffusion_schedule, std::string> make_cosine_schedule(
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std::uint32_t base_steps, std::uint32_t sample_steps);
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// In-place DDIM eta=0 update for a contiguous [B,T,D] F32 tensor.
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std::expected<void, std::string> ddim_step(
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const diffusion_schedule &schedule, std::uint32_t index,
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const float *x_t, const float *pred_xstart, float *output,
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std::size_t values);
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// Exact separated CFG chunk order from upstream: text, constraint, uncond.
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std::expected<void, std::string> separated_cfg(
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const float *text, const float *constraint, const float *uncond,
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float text_weight, float constraint_weight, float *output,
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std::size_t values);
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} // namespace kimodo::detail
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