eval.py

from io import BytesIO
from urllib.request import urlopen
import soundfile
import torch
from datasets import load_dataset, Audio
import numpy as np
from transformers import AutoModel, AutoProcessor, BatchFeature
from tqdm import tqdm
import json
import os
import time
from datetime import datetime
from whisper_normalizer.english import EnglishTextNormalizer
from whisper_normalizer.basic import BasicTextNormalizer
import sacrebleu
from jiwer import cer, wer
from torch.utils.data import Dataset, DataLoader
import soundfile as sf
import re
from pathlib import Path
import opencc
from ASRDataset import *
converter = opencc.OpenCC('s2tw.json')
normalizer = {
    "en_us" : EnglishTextNormalizer(),
    "other" : BasicTextNormalizer()
}

model_id = "/mnt/jeff/InCar/LlamaNemotronOmni/test_nemotron_omni"
revision = "main" #"v1.0"

model = AutoModel.from_pretrained(
    model_id, device_map="cuda", revision = revision, trust_remote_code=True
).eval()

processor = AutoProcessor.from_pretrained(
    model_id, revision = revision, trust_remote_code=True
)
if 'LlamaNemotronOmni' in model_id:
    processor.tokenizer.pad_token_id = processor.tokenizer.eos_token_id

results_dir = f"evaluation_results_{datetime.now().strftime('%Y%m%d_%H%M%S')}"
os.makedirs(results_dir, exist_ok=True)


INSTRUCTION = {
    "ast": "Translate the audio to {0}.",
    "asr": "Transcribe the audio clip into text.",
}

def covost_collate_fn_test(batch):
    input_ids_list = []
    input_audio_embeds_list = []
    audio_embed_sizes_list = []
    audio_attention_mask_list = []
    input_modes_list = []
    answer_list = []
    for inputs in batch:
        input_ids_list.append(inputs['input_ids'][0])
        input_audio_embeds_list.append(inputs['input_audio_embeds'])
        audio_embed_sizes_list.append(inputs['audio_embed_sizes'])
        audio_attention_mask_list.append(
            inputs['input_audio_embeds'].new_full((inputs['input_audio_embeds'].size(1),), True, dtype=torch.bool)
        )
        input_modes_list.append(inputs['input_modes'])
        answer_list.append(inputs['answer'])

    try:
        input_ids = pad_sequence(input_ids_list, padding_side='left', padding_value=0)
        audio_attention_mask = (
            pad_sequence(audio_attention_mask_list, padding_side='right', padding_value=False)
            if len(audio_attention_mask_list) > 1
            else None
        )
    except Exception as e:
        print(e)
        print(input_ids_list)
        print(audio_attention_mask)
        raise
    attention_mask = (input_ids != 0).long()
    input_audio_embeds = cat_with_pad(input_audio_embeds_list, dim=0)
    audio_embed_sizes = torch.cat(audio_embed_sizes_list)
    input_modes = torch.cat(input_modes_list)

    return BatchFeature(
        {
            'input_ids': input_ids,
            'attention_mask': attention_mask,
            'input_audio_embeds': input_audio_embeds,
            'audio_embed_sizes': audio_embed_sizes,
            'audio_attention_mask': audio_attention_mask,
            'input_modes': input_modes,
            'answer': answer_list,
        }
    )

def save_results(results, dataset_name, task, source_lang, target_lang=None, sample_idx=None):
    filename = f"{task}_{dataset_name}_{source_lang}"
    if target_lang:
        filename += f"_to_{target_lang}"
    if sample_idx is not None:
        filename += f"_sample_{sample_idx}"
    
    filepath = os.path.join(results_dir, f"{filename}.json")
    
    results["timestamp"] = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    
    with open(filepath, 'w', encoding='utf-8') as f:
        json.dump(results, f, ensure_ascii=False, indent=2)
    
    return filepath

def evaluate_task(dataset, source_lang, target_lang, num_samples=-1, batch_size = 4, is_asr=True):
    task_type = "asr" if is_asr else "translation"
    eval_lang = source_lang if is_asr else target_lang
    if eval_lang in normalizer:
        eval_normalizer = normalizer[eval_lang]
    else:
        eval_normalizer = normalizer['other']
    sample_results = []
    
    if num_samples > 0 and num_samples < len(dataset):
        indices = np.random.choice(len(dataset), num_samples, replace=False)
        dataset = dataset.select(indices)
    
    dataloader = DataLoader(dataset, batch_size=batch_size, shuffle=False, collate_fn=covost_collate_fn_test)
        
    evaluated_samples = {} 
    
    for batch_idx, batch in enumerate(tqdm(dataloader)):
        batch_references = batch.pop("answer")

        if torch.cuda.is_available():
            try:
                batch = {k: v.to("cuda") for k, v in batch.items()}
            except:
                print('error')
                break
        
        with torch.inference_mode():
            generate_ids = model.generate(**batch, 
            max_new_tokens=256,
            #temperature = 1.0, top_p = 0.95, top_k = 64, do_sample=True
            )
            
            input_lengths = batch['input_ids'].shape[1]
            generate_ids = generate_ids[:, input_lengths:]
        
            batch_predictions = processor.batch_decode(
                generate_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False
            )
        
        for i, (reference, prediction) in enumerate(zip(batch_references, batch_predictions)):
            idx = batch_idx * batch_size + i
            sample_result = {
                "id": idx,
                "reference": reference,
                "prediction": converter.convert(prediction)
            }
            sample_results.append(sample_result)

        if (batch_idx + 1) % 10 == 0:
            temp_results = []
            
            for item in sample_results:
                sample_id = item["id"]
                
                if sample_id in evaluated_samples:
                    temp_item = item.copy()
                    temp_item.update(evaluated_samples[sample_id])
                    temp_results.append(temp_item)
                else:
                    temp_item = item.copy()
                    try:
                        ref = eval_normalizer(item["reference"])
                        pred = eval_normalizer(item["prediction"])

                        # BLEU, WER/CER
                        utt_bleu = sacrebleu.sentence_bleu(pred, [ref]).score
                        utt_cer = round(cer(re.sub(r"\s+", "", ref), re.sub(r"\s+", "", pred)) * 100, 2)
                        utt_wer = round(wer(ref, pred) * 100, 2)

                        metrics = {
                            "bleu": utt_bleu,
                            "cer": min(100,utt_cer),
                            "wer": utt_wer
                        }
                        
                        evaluated_samples[sample_id] = metrics
                        temp_item.update(metrics)
                    except Exception as e:
                        print(f"Error evaluating sample {sample_id}: {e}")
                        metrics = {
                            "bleu": 0,
                            "cer": 100,
                            "wer": 100,
                            "error": str(e)
                        }
                        evaluated_samples[sample_id] = metrics
                        temp_item.update(metrics)
                
                    temp_results.append(temp_item)

            partial_results = {
                "task": task_type,
                "source_lang": source_lang,
                "target_lang": target_lang,
                "num_samples": len(temp_results),
                "sample_results": temp_results
            }
            save_results(partial_results, dataset.name, task_type, source_lang, target_lang)

    for item in sample_results:
        ref = eval_normalizer(item["reference"])
        pred = eval_normalizer(item["prediction"])

        utt_bleu = sacrebleu.sentence_bleu(pred, [ref]).score
        utt_cer = round(cer(re.sub(r"\s+", "", ref), re.sub(r"\s+", "", pred)) * 100, 2)
        utt_wer = round(wer(ref, pred) * 100, 2)

        item.update({
            "bleu": utt_bleu,
            "cer": min(100,utt_cer),
            "wer": utt_wer
        })

    avg_bleu = sum(item["bleu"] for item in sample_results) / len(sample_results)
    avg_cer = sum(item["cer"] for item in sample_results) / len(sample_results)
    avg_wer = sum(item["wer"] for item in sample_results) / len(sample_results)
    
    results = {
        "dataset": dataset.name,
        "task": task_type,
        "source_lang": source_lang,
        "target_lang": target_lang,
        "num_samples": len(sample_results),
        "metrics": {
            "bleu": avg_bleu,
            "cer": avg_cer,
            "wer": avg_wer
        },
        "sample_results": sample_results
    }
    
    save_results(results, dataset.name, task_type, source_lang, target_lang)
    return results


if __name__ == "__main__":

    source_languages = [
        ("en_us", "English"),
    ]
    
    target_languages = [
        ("zh-TW", "zh-TW"),
    ]

    num_samples = -1
    batch_size = 32

    for source_lang, target_lang in zip(source_languages, target_languages):
        print(f"\n===== {source_lang[0]} ASR =====")
        
        split = "test"

        datasets = []

        
        
        commonvoice_speech_tw = CommonVoiceDataset(
            processor=processor,
            source_lang="zh-TW",
            split=split
        )
        datasets.append(commonvoice_speech_tw)
        fleurs = FleursDataset(
            processor=processor,
            split=split,
            source_lang="en_us",  # English
            mode="asr"
        )
        datasets.append(fleurs)

        # Libri Speech Clean ASR mode (English -> English text)
        # libri_speech_clean = LibriSpeechDataset(
        #     processor=processor,
        #     subset="clean",
        #     split=split
        # )
        # datasets.append(libri_speech_clean)

        # # Libri Speech Other ASR mode (English -> English text)
        # libri_speech_other = LibriSpeechDataset(
        #     processor=processor,
        #     subset="other",
        #     split=split
        # )
        # datasets.append(libri_speech_other)

        # Fleurs ASR mode (English -> English text)
        

        for dataset in datasets:
            # ASR
            asr_results = evaluate_task(dataset, source_lang[0], target_lang[0], num_samples, batch_size=batch_size, is_asr = True)

            print(f"\n=== {asr_results.get('dataset', 'Dataset')} | {source_lang[0]} ASR===")
            print(f"BLEU: {asr_results.get('metrics', {}).get('bleu', 'N/A')}")
            print(f"WER: {asr_results.get('metrics', {}).get('wer', 'N/A')}")
            print(f"CER: {asr_results.get('metrics', {}).get('cer', 'N/A')}")