logic.py

from transformers import Wav2Vec2Processor, Wav2Vec2ForCTC
from optimum.bettertransformer import BetterTransformer
import torch
import librosa

device = 'cuda' if torch.cuda.is_available() else 'cpu'
# os.environ['PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION'] = 'python'
# os.environ['TRANSFORMERS_NO_ADVISORY_WARNINGS'] = '1'
# os.environ['TRANSFORMERS_VERBOSITY'] = 'error'
torch.random.manual_seed(0); 
# protobuf==3.20.0

processor = Wav2Vec2Processor.from_pretrained("facebook/wav2vec2-base-960h")
model = Wav2Vec2ForCTC.from_pretrained("facebook/wav2vec2-base-960h")
model = BetterTransformer.transform(model)


def load_audio(audio_path, processor):
    audio, sr = librosa.load(audio_path, sr=None)

    input_values = processor(audio, sampling_rate=16000, return_tensors="pt").input_features
    return input_values
        
@torch.inference_mode()
def get_emissions(input_values, model):
    results = model(input_values,).logits
    return results

def score_audio(audio_path, true_result):
    true_result = true_result.split('/')
    input_values = load_audio(audio_path, processor)
    logits = get_emissions(input_values, model).cpu()
    predicted_ids = torch.argmax(logits, dim=-1)
    transcription = processor.batch_decode(predicted_ids)[0].lower()
 

    result = {'transcription': transcription,
              'score': int(any([x in transcription for x in true_result])),
              }
    return result