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//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef THIRD_PARTY_ODML_LITERT_LM_RUNTIME_COMPONENTS_CONSTRAINED_DECODING_LLG_CONSTRAINT_PROVIDER_H_
#define THIRD_PARTY_ODML_LITERT_LM_RUNTIME_COMPONENTS_CONSTRAINED_DECODING_LLG_CONSTRAINT_PROVIDER_H_
#include <cstdint>
#include <memory>
#include <utility>
#include <vector>
#include "absl/status/statusor.h" // from @com_google_absl
#include "runtime/components/constrained_decoding/constraint.h"
#include "runtime/components/constrained_decoding/constraint_provider.h"
#include "runtime/components/constrained_decoding/constraint_provider_config.h"
#include "runtime/components/constrained_decoding/llg_constraint_config.h"
#include "runtime/components/tokenizer.h"
#include "llguidance.h"
namespace litert::lm {
class LlgConstraintProvider : public ConstraintProvider {
public:
static absl::StatusOr<std::unique_ptr<ConstraintProvider>> Create(
const Tokenizer& tokenizer, LlGuidanceConfig llg_config);
// LlgTokenizer must be valid. Takes ownership of LlgTokenizer.
explicit LlgConstraintProvider(std::vector<uint32_t>&& token_lens,
std::vector<uint8_t>&& token_bytes,
LlgTokenizer* llg_tokenizer,
LlGuidanceConfig llg_config)
: token_lens_(std::move(token_lens)),
token_bytes_(std::move(token_bytes)),
llg_tokenizer_(std::move(llg_tokenizer)),
llg_config_(std::move(llg_config)) {}
~LlgConstraintProvider() override;
absl::StatusOr<std::unique_ptr<Constraint>> CreateConstraint(
ConstraintArg constraint_arg) const override;
private:
const std::vector<uint32_t> token_lens_;
const std::vector<uint8_t> token_bytes_;
LlgTokenizer* llg_tokenizer_; // Owned.
LlGuidanceConfig llg_config_;
};
} // namespace litert::lm
#endif // THIRD_PARTY_ODML_LITERT_LM_RUNTIME_COMPONENTS_CONSTRAINED_DECODING_LLG_CONSTRAINT_PROVIDER_H_
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