# Default output options
AUDIO_FORMAT = "m4b"
AUDIO_BITRATE = "128k"
LANGUAGE = "English"

API_TIMEOUT = 600  # Timeout per chunk request in seconds
MAX_RETRIES = 3    # Attempts per chunk request
HEARTBEAT_INTERVAL_SECONDS = 30  # Print "still working" in console logs every N seconds

# Words per TTS generation request.
# Note that qwen-tts-demo does no chunking at all, but faster-qwen3-tts and
# audio.cpp may do chunking as well, so you may be needlessly double-chunking.
# This is the only size limit: there is no hard ceiling. However, servers
# silently truncate audio when a single generation runs too long (roughly
# ~2.5 min on the faster backend's static KV cache, ~11 min on the Gradio
# demo) without reporting an error, so raising this is at your own risk.
# The client-side truncation check still catches and retries gross cases.
CHUNK_SIZE = 250

# Default TTS backend.
# gradio: qwen-tts-demo
# faster: faster-qwen-tts
# audiocpp: audiocpp_server
# The --backend CLI flag overrides this
BACKEND = "gradio"

###############################################################################
# BACKEND 1: qwen-tts-demo (gradio) options                                   #
###############################################################################

# There are different API URLs for CustomVoice and Base models so you can run both at once
QWEN_API_URL     = "http://127.0.0.1:7860"  # CustomVoice model
CLONE_API_URL    = "http://127.0.0.1:7861"  # Base model

# Custom voice options
SPEAKER = "Vivian"  #Vivian, Serena, Uncle_Fu, Dylan, Eric, Ryan, Aiden, Ono_Anna, Sohee
INSTRUCT = "Speak naturally and clearly, as if reading a dramatic book to an adult audience."

# Don't clone with transcription, only use x-vector-only cloning. Generally "worse"
XVECTOR_ONLY = False

# Randomization seed. -1 means randomize with every generation
# With SEED = -1 and CONSTANT_SEED = True, one random seed will be used for the entire audiobook.
# This may keep the voice slightly more consistent across chunk boundaries
SEED = -1
CONSTANT_SEED = False

###############################################################################
# BACKEND 2: faster-qwen-tts options                                          #
###############################################################################
FASTER_API_URL   = "http://127.0.0.1:8000"    # faster-qwen3-tts server (Base model only)

# Default voice if no --voice is passed
FASTER_VOICE = "default"

###############################################################################
# BACKEND 3: audio.cpp options                                                #
###############################################################################
AUDIOCPP_API_URL = "http://127.0.0.1:8080"  # audio.cpp audiocpp_server

# Model ids in the audio.cpp server.json config.
AUDIOCPP_MODEL_ID = "qwen"
AUDIOCPP_CLONE_MODEL_ID = "qwen-clone"