# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
"""dots.tts pipeline topology (frozen).

Single-stage AR TTS: text → 48 kHz waveform in one pass.
Architecture: Qwen2.5-1.5B base LM (vLLM-native) → DiTAR / MeanFlow head
→ AudioVAE.decode → BigVGAN → 48 kHz mono.

Speaker conditioning via CAM++ x-vector injected in preprocess().

Modeled after voxcpm2's single-stage pipeline (same "vLLM-native base LM
+ side-path computation" pattern), but simplified: no residual LM, no FSQ.
"""

from vllm_omni.config.stage_config import (
    PipelineConfig,
    StageExecutionType,
    StagePipelineConfig,
)

DOTS_TTS_PIPELINE = PipelineConfig(
    model_type="dots_tts",
    model_arch="DotsTTSForConditionalGeneration",
    default_deploy_config_name="dots_tts.yaml",
    stages=(
        StagePipelineConfig(
            stage_id=0,
            model_stage="latent_generator",
            execution_type=StageExecutionType.LLM_AR,
            input_sources=(),
            final_output=True,
            final_output_type="audio",
            owns_tokenizer=True,
            engine_output_type="audio",
            sampling_constraints={
                "detokenize": False,
                # Stop signal slot in compute_logits (voxcpm2 convention —
                # talker emits logits[i, 1] = 1.0 when prob_stop > 0.8, vLLM
                # matches against this list to terminate the request).  Not
                # Qwen2.5 EOS (151643) — that ID would never come out of the
                # 2-slot continue/stop softmax our compute_logits builds.
                "stop_token_ids": [1],
            },
        ),
    ),
)