init_model.py

from stable_speech import StableSpeechConfig, StableSpeechForCausalLM, StableSpeechForConditionalGeneration, StableSpeechDecoderConfig
from transformers import T5Config, EncodecConfig
from transformers import AutoConfig


text_model = "google-t5/t5-small"
encodec_version = "facebook/encodec_24khz"
num_codebooks = 8


t5 = AutoConfig.from_pretrained(text_model)
encodec = AutoConfig.from_pretrained(encodec_version)

encodec_vocab_size = encodec.codebook_size


decoder_config = StableSpeechDecoderConfig(
    vocab_size=encodec_vocab_size+1,
    max_position_embeddings=2250, # 30 s
    num_hidden_layers=12,
    ffn_dim=4096,
    num_attention_heads=16,
    layerdrop=0.0,
    use_cache=True,
    activation_function="gelu",
    hidden_size=1024,
    dropout=0.0,
    attention_dropout=0.0,
    activation_dropout=0.0,
    pad_token_id=encodec_vocab_size,
    eos_token_id=encodec_vocab_size,
    bos_token_id=encodec_vocab_size+1,
    num_codebooks=num_codebooks,
)

        
decoder = StableSpeechForCausalLM(decoder_config)
decoder.save_pretrained("/raid/yoach/tmp/artefacts/decoder/")




model = StableSpeechForConditionalGeneration.from_sub_models_pretrained(
    text_encoder_pretrained_model_name_or_path=text_model,
    audio_encoder_pretrained_model_name_or_path=encodec_version,
    decoder_pretrained_model_name_or_path="/raid/yoach/tmp/artefacts/decoder/",
    vocab_size = t5.vocab_size
)

# set the appropriate bos/pad token ids
model.generation_config.decoder_start_token_id = encodec_vocab_size+1
model.generation_config.pad_token_id = encodec_vocab_size
model.generation_config.eos_token_id = encodec_vocab_size

# set other default generation config params
model.generation_config.max_length = int(30 * model.audio_encoder.config.frame_rate)
model.generation_config.do_sample = False # True
model.generation_config.guidance_scale = 1 # 3.0


model.save_pretrained("/raid/yoach/tmp/artefacts/small-stable-speech-untrained/")