Update app.py

app.py

@@ -35,10 +35,9 @@ torch.backends.cuda.enabled = False
 
 torch.set_grad_enabled(False)
 
-# Force CPU usage and set default dtype to float16
-torch.set_default_dtype(torch.float16)
+# Force CPU usage
 device = torch.device("cpu")
-print(f"[DEVICE] | Using device: {device} with dtype {torch.get_default_dtype()}")
+print(f"[DEVICE] | Using device: {device}")
 
 # ----------------------------
 # Load Models and Configuration
@@ -54,11 +53,7 @@ def load_custom_model_from_hf(repo_id, model_filename="pytorch_model.bin", confi
     return model_path, config_path
     
 # Load DiT model
-dit_checkpoint_path, dit_config_path = load_custom_model_from_hf(
-    "Plachta/Seed-VC", 
-    "DiT_seed_v2_uvit_whisper_small_wavenet_bigvgan_pruned.pth", 
-    "config_dit_mel_seed_uvit_whisper_small_wavenet.yml"
-)
+dit_checkpoint_path, dit_config_path = load_custom_model_from_hf("Plachta/Seed-VC", "DiT_seed_v2_uvit_whisper_small_wavenet_bigvgan_pruned.pth", "config_dit_mel_seed_uvit_whisper_small_wavenet.yml")
 config = yaml.safe_load(open(dit_config_path, 'r'))
 model_params = recursive_munch(config['model_params'])
 model = build_model(model_params, stage='DiT')
@@ -72,8 +67,9 @@ sr = config['preprocess_params']['sr']
 # Load DiT checkpoints
 model, _, _, _ = load_checkpoint(model, None, dit_checkpoint_path, load_only_params=True, ignore_modules=[], is_distributed=False)
 for key in model:
-    model[key] = model[key].eval().to(device).half()
-print("[INFO] | DiT model loaded, set to eval mode, and converted to float16.")
+    model[key].eval()
+    model[key].to(device)
+print("[INFO] | DiT model loaded and set to eval mode.")
 
 model.cfm.estimator.setup_caches(max_batch_size=1, max_seq_length=8192)
 
@@ -85,32 +81,34 @@ except NameError:
     print("[ERROR] | CAMPPlus is not defined. Please check the import path and ensure CAMPPlus is correctly defined.")
     raise
 
+# Set weights_only=True for security
 campplus_ckpt_path = load_custom_model_from_hf("funasr/campplus", "campplus_cn_common.bin", config_filename=None)
-campplus_state = torch.load(campplus_ckpt_path, map_location="cpu")
+campplus_state = torch.load(campplus_ckpt_path, map_location="cpu", weights_only=True)
 campplus_model.load_state_dict(campplus_state)
-campplus_model = campplus_model.eval().to(device).half()
-print("[INFO] | CAMPPlus model loaded, set to eval mode, and converted to float16.")
+campplus_model.eval()
+campplus_model.to(device)
+print("[INFO] | CAMPPlus model loaded, set to eval mode, and moved to CPU.")
 
 # Load BigVGAN model
-bigvgan_model = bigvgan.BigVGAN.from_pretrained('nvidia/bigvgan_v2_22khz_80band_256x', use_cuda_kernel=False)
+bigvgan_model = bigvgan.BigVGAN.from_pretrained('nvidia/bigvgan_base_22khz_80band', use_cuda_kernel=False)
 bigvgan_model.remove_weight_norm()
-bigvgan_model = bigvgan_model.eval().to(device).half()
-print("[INFO] | BigVGAN model loaded, weight norm removed, set to eval mode, and converted to float16.")
+bigvgan_model = bigvgan_model.eval().to(device)
+print("[INFO] | BigVGAN model loaded, weight norm removed, set to eval mode, and moved to CPU.")
 
 # Load FAcodec model
 ckpt_path, config_path = load_custom_model_from_hf("Plachta/FAcodec", 'pytorch_model.bin', 'config.yml')
 codec_config = yaml.safe_load(open(config_path))
 codec_model_params = recursive_munch(codec_config['model_params'])
 codec_encoder = build_model(codec_model_params, stage="codec")
-ckpt_params = torch.load(ckpt_path, map_location="cpu")
+ckpt_params = torch.load(ckpt_path, map_location="cpu", weights_only=True)
 for key in codec_encoder:
     codec_encoder[key].load_state_dict(ckpt_params[key], strict=False)
-codec_encoder = {k: v.eval().to(device).half() for k, v in codec_encoder.items()}
-print("[INFO] | FAcodec model loaded, set to eval mode, and converted to float16.")
+codec_encoder = {k: v.eval().to(device) for k, v in codec_encoder.items()}
+print("[INFO] | FAcodec model loaded, set to eval mode, and moved to CPU.")
 
-# Load Whisper model with float16 and compatible size
+# Load Whisper model with float32 and compatible size
 whisper_name = model_params.speech_tokenizer.whisper_name if hasattr(model_params.speech_tokenizer, 'whisper_name') else "openai/whisper-small"
-whisper_model = WhisperModel.from_pretrained(whisper_name, torch_dtype=torch.float16).to(device)
+whisper_model = WhisperModel.from_pretrained(whisper_name, torch_dtype=torch.float32).to(device)
 del whisper_model.decoder  # Remove decoder as it's not used
 whisper_feature_extractor = AutoFeatureExtractor.from_pretrained(whisper_name)
 print(f"[INFO] | Whisper model '{whisper_name}' loaded with dtype {whisper_model.dtype} and moved to CPU.")
@@ -129,11 +127,7 @@ mel_fn_args = {
 to_mel = lambda x: mel_spectrogram(x, **mel_fn_args)
 
 # Load F0 conditioned model
-dit_checkpoint_path_f0, dit_config_path_f0 = load_custom_model_from_hf(
-    "Plachta/Seed-VC", 
-    "DiT_seed_v2_uvit_whisper_base_f0_44k_bigvgan_pruned_ft_ema.pth", 
-    "config_dit_mel_seed_uvit_whisper_base_f0_44k.yml"
-)
+dit_checkpoint_path_f0, dit_config_path_f0 = load_custom_model_from_hf("Plachta/Seed-VC", "DiT_seed_v2_uvit_whisper_base_f0_44k_bigvgan_pruned_ft_ema.pth", "config_dit_mel_seed_uvit_whisper_base_f0_44k.yml")
 config_f0 = yaml.safe_load(open(dit_config_path_f0, 'r'))
 model_params_f0 = recursive_munch(config_f0['model_params'])
 model_f0 = build_model(model_params_f0, stage='DiT')
@@ -144,15 +138,16 @@ sr_f0 = config_f0['preprocess_params']['sr']
 # Load F0 model checkpoints
 model_f0, _, _, _ = load_checkpoint(model_f0, None, dit_checkpoint_path_f0, load_only_params=True, ignore_modules=[], is_distributed=False)
 for key in model_f0:
-    model_f0[key] = model_f0[key].eval().to(device).half()
+    model_f0[key].eval()
+    model_f0[key].to(device)
 print("[INFO] | F0 conditioned DiT model loaded and set to eval mode.")
 
 model_f0.cfm.estimator.setup_caches(max_batch_size=1, max_seq_length=8192)
 
 # Load F0 extractor
 model_path = load_custom_model_from_hf("lj1995/VoiceConversionWebUI", "rmvpe.pt", None)
-rmvpe = RMVPE(model_path, is_half=True, device=device)  # Ensure RMVPE supports half precision
-print("[INFO] | RMVPE model loaded and converted to float16.")
+rmvpe = RMVPE(model_path, is_half=False, device=device)
+print("[INFO] | RMVPE model loaded and moved to CPU.")
 
 mel_fn_args_f0 = {
     "n_fft": config_f0['preprocess_params']['spect_params']['n_fft'],
@@ -169,8 +164,8 @@ to_mel_f0 = lambda x: mel_spectrogram(x, **mel_fn_args_f0)
 # Load BigVGAN 44kHz model
 bigvgan_44k_model = bigvgan.BigVGAN.from_pretrained('nvidia/bigvgan_v2_44khz_128band_512x', use_cuda_kernel=False)
 bigvgan_44k_model.remove_weight_norm()
-bigvgan_44k_model = bigvgan_44k_model.eval().to(device).half()
-print("[INFO] | BigVGAN 44kHz model loaded, weight norm removed, set to eval mode, and converted to float16.")
+bigvgan_44k_model = bigvgan_44k_model.eval().to(device)
+print("[INFO] | BigVGAN 44kHz model loaded, weight norm removed, set to eval mode, and moved to CPU.")
 
 # CSS Styling
 css = '''
@@ -188,72 +183,166 @@ footer {
 @torch.no_grad()
 @torch.inference_mode()
 def voice_conversion(input, reference, steps, guidance, pitch, speed):
+    print("[INFO] | Voice conversion started.")
+    
     inference_module, mel_fn, bigvgan_fn = model, to_mel, bigvgan_model
     bitrate, sampling_rate, sr_current, hop_length_current = "320k", 16000, 22050, 256
     max_context_window, overlap_wave_len = sr_current // hop_length_current * 30, 16 * hop_length_current
-
-    # Load and process input audio
+    
+    # Load audio using librosa
+    print("[INFO] | Loading source and reference audio.")
     source_audio, _ = librosa.load(input, sr=sr_current)
     ref_audio, _ = librosa.load(reference, sr=sr_current)
-    source_audio_tensor = torch.tensor(source_audio, dtype=torch.float16).unsqueeze(0).to(device)
-    ref_audio_tensor = torch.tensor(ref_audio, dtype=torch.float16).unsqueeze(0).to(device)
-
+    
+    # Clip reference audio to 25 seconds
+    ref_audio = ref_audio[:sr_current * 25]
+    print(f"[INFO] | Source audio length: {len(source_audio)/sr_current:.2f}s, Reference audio length: {len(ref_audio)/sr_current:.2f}s")
+    
+    # Convert audio to tensors
+    source_audio_tensor = torch.tensor(source_audio).unsqueeze(0).float().to(device)
+    ref_audio_tensor = torch.tensor(ref_audio).unsqueeze(0).float().to(device)
+    
+    # Resample to 16kHz
+    ref_waves_16k = torchaudio.functional.resample(ref_audio_tensor, sr_current, sampling_rate)
+    converted_waves_16k = torchaudio.functional.resample(source_audio_tensor, sr_current, sampling_rate)
+    
     # Generate Whisper features
-    alt_inputs = whisper_feature_extractor(
-        [source_audio_tensor.squeeze(0).cpu().numpy()], 
-        return_tensors="pt", 
-        sampling_rate=sampling_rate
-    )
-    alt_input_features = whisper_model._mask_input_features(
-        alt_inputs.input_features.to(torch.float16), 
-        attention_mask=alt_inputs.attention_mask
-    ).to(device)
-    alt_outputs = whisper_model.encoder(alt_input_features).last_hidden_state.to(torch.float16)
-
+    print("[INFO] | Generating Whisper features for source audio.")
+    if converted_waves_16k.size(-1) <= sampling_rate * 30:
+        alt_inputs = whisper_feature_extractor([converted_waves_16k.squeeze(0).cpu().numpy()], return_tensors="pt", return_attention_mask=True, sampling_rate=sampling_rate)
+        alt_input_features = whisper_model._mask_input_features(alt_inputs.input_features, attention_mask=alt_inputs.attention_mask).to(device)
+        alt_outputs = whisper_model.encoder(alt_input_features.to(torch.float32), head_mask=None, output_attentions=False, output_hidden_states=False, return_dict=True)
+        S_alt = alt_outputs.last_hidden_state.to(torch.float32)
+        S_alt = S_alt[:, :converted_waves_16k.size(-1) // 320 + 1]
+        print(f"[INFO] | S_alt shape: {S_alt.shape}")
+    else:
+        # Process in chunks
+        print("[INFO] | Processing source audio in chunks.")
+        overlapping_time = 5  # seconds
+        chunk_size = sampling_rate * 30  # 30 seconds
+        overlap_size = sampling_rate * overlapping_time
+        S_alt_list = []
+        buffer = None
+        traversed_time = 0
+        total_length = converted_waves_16k.size(-1)
+        
+        while traversed_time < total_length:
+            if buffer is None:
+                chunk = converted_waves_16k[:, traversed_time:traversed_time + chunk_size]
+            else:
+                chunk = torch.cat([buffer, converted_waves_16k[:, traversed_time:traversed_time + chunk_size - overlap_size]], dim=-1)
+            alt_inputs = whisper_feature_extractor([chunk.squeeze(0).cpu().numpy()], return_tensors="pt", return_attention_mask=True, sampling_rate=sampling_rate)
+            alt_input_features = whisper_model._mask_input_features(alt_inputs.input_features, attention_mask=alt_inputs.attention_mask).to(device)
+            alt_outputs = whisper_model.encoder(alt_input_features.to(torch.float32), head_mask=None, output_attentions=False, output_hidden_states=False, return_dict=True)
+            S_chunk = alt_outputs.last_hidden_state.to(torch.float32)
+            S_chunk = S_chunk[:, :chunk.size(-1) // 320 + 1]
+            print(f"[INFO] | Processed chunk with S_chunk shape: {S_chunk.shape}")
+            
+            if traversed_time == 0:
+                S_alt_list.append(S_chunk)
+            else:
+                skip_frames = 50 * overlapping_time
+                S_alt_list.append(S_chunk[:, skip_frames:])
+                
+            buffer = chunk[:, -overlap_size:]
+            traversed_time += chunk_size - overlap_size
+        
+        S_alt = torch.cat(S_alt_list, dim=1)
+        print(f"[INFO] | Final S_alt shape after chunk processing: {S_alt.shape}")
+    
+    # Original Whisper features
+    print("[INFO] | Generating Whisper features for reference audio.")
+    ori_waves_16k = torchaudio.functional.resample(ref_audio_tensor, sr_current, sampling_rate)
+    ori_inputs = whisper_feature_extractor([ori_waves_16k.squeeze(0).cpu().numpy()], return_tensors="pt", return_attention_mask=True, sampling_rate=sampling_rate)
+    ori_input_features = whisper_model._mask_input_features(ori_inputs.input_features, attention_mask=ori_inputs.attention_mask).to(device)
+    ori_outputs = whisper_model.encoder(ori_input_features.to(torch.float32), head_mask=None, output_attentions=False, output_hidden_states=False, return_dict=True)
+    S_ori = ori_outputs.last_hidden_state.to(torch.float32)
+    S_ori = S_ori[:, :ori_waves_16k.size(-1) // 320 + 1]
+    print(f"[INFO] | S_ori shape: {S_ori.shape}")
+    
     # Generate mel spectrograms
-    mel = mel_fn(source_audio_tensor)
-    mel2 = mel_fn(ref_audio_tensor)
-
+    print("[INFO] | Generating mel spectrograms.")
+    mel = mel_fn(source_audio_tensor.float())
+    mel2 = mel_fn(ref_audio_tensor.float())
+    print(f"[INFO] | Mel spectrogram shapes: mel={mel.shape}, mel2={mel2.shape}")
+    
+    # Length adjustment
+    target_lengths = torch.LongTensor([int(mel.size(2) / speed)]).to(mel.device)
+    target2_lengths = torch.LongTensor([mel2.size(2)]).to(mel2.device)
+    print(f"[INFO] | Target lengths: {target_lengths.item()}, {target2_lengths.item()}")
+    
     # Extract style features
-    feat2 = torchaudio.compliance.kaldi.fbank(
-        ref_audio_tensor, num_mel_bins=80, dither=0, sample_frequency=sampling_rate
-    )
-    style2 = campplus_model(feat2.unsqueeze(0).to(torch.float16))
-
-    # Length regulation
-    cond, _, _, _, _ = inference_module.length_regulator(
-        alt_outputs, ylens=target_lengths, n_quantizers=3, f0=None
-    )
-    prompt_condition, _, _, _, _ = inference_module.length_regulator(
-        mel2, ylens=target2_lengths, n_quantizers=3, f0=None
-    )
-
-    # Inference and waveform generation
+    print("[INFO] | Extracting style features from reference audio.")
+    feat2 = torchaudio.compliance.kaldi.fbank(ref_waves_16k, num_mel_bins=80, dither=0, sample_frequency=sampling_rate)
+    feat2 = feat2 - feat2.mean(dim=0, keepdim=True)
+    style2 = campplus_model(feat2.unsqueeze(0))
+    print(f"[INFO] | Style2 shape: {style2.shape}")
+    
+    # Length Regulation
+    print("[INFO] | Applying length regulation.")
+    cond, _, _, _, _ = inference_module.length_regulator(S_alt, ylens=target_lengths, n_quantizers=3, f0=None)
+    prompt_condition, _, _, _, _ = inference_module.length_regulator(S_ori, ylens=target2_lengths, n_quantizers=3, f0=None)
+    print(f"[INFO] | Cond shape: {cond.shape}, Prompt condition shape: {prompt_condition.shape}")
+    
+    # Initialize variables for audio generation
+    max_source_window = max_context_window - mel2.size(2)
+    processed_frames = 0
     generated_wave_chunks = []
+    
+    print("[INFO] | Starting inference and audio generation.")
+    
     while processed_frames < cond.size(1):
         chunk_cond = cond[:, processed_frames:processed_frames + max_source_window]
-        cat_condition = torch.cat([prompt_condition, chunk_cond], dim=1).to(torch.float16)
+        is_last_chunk = processed_frames + max_source_window >= cond.size(1)
+        cat_condition = torch.cat([prompt_condition, chunk_cond], dim=1)
         
-        vc_target = inference_module.cfm.inference(
-            cat_condition, 
-            torch.LongTensor([cat_condition.size(1)]).to(mel2.device), 
-            mel2, style2, None, steps, inference_cfg_rate=guidance
-        )
+        # Perform inference
+        vc_target = inference_module.cfm.inference(cat_condition, torch.LongTensor([cat_condition.size(1)]).to(mel2.device), mel2, style2, None, steps, inference_cfg_rate=guidance)
+        vc_target = vc_target[:, :, mel2.size(2):]
+        print(f"[INFO] | vc_target shape: {vc_target.shape}")
+
+        # Generate waveform using BigVGAN
+        vc_wave = bigvgan_fn(vc_target.float())[0]
+        print(f"[INFO] | vc_wave shape: {vc_wave.shape}")
         
-        vc_wave = bigvgan_model(vc_target.float())[0].to(torch.float16)
-        generated_wave_chunks.append(vc_wave.cpu().numpy())
-
-    # Concatenate and process final audio
-    final_audio = np.concatenate(generated_wave_chunks).astype(np.float16)
-    final_audio = librosa.effects.pitch_shift(
-        final_audio.astype(np.float32), sr=sr_current, n_steps=pitch
-    ).astype(np.float16)
-    final_audio /= np.max(np.abs(final_audio)).astype(np.float16)
-
-    # Save and return audio
+        # Handle the generated waveform
+        output_wave = vc_wave[0].cpu().numpy()
+        generated_wave_chunks.append(output_wave)
+        
+        # Ensure processed_frames increments correctly to avoid infinite loop
+        processed_frames += vc_target.size(2)
+        
+        print(f"[INFO] | Processed frames updated to: {processed_frames}")
+    
+    # Concatenate all generated wave chunks
+    final_audio = np.concatenate(generated_wave_chunks).astype(np.float32)
+    
+    # Pitch Shifting using librosa
+    print("[INFO] | Applying pitch shifting.")
+    try:
+        if pitch != 0:
+            final_audio = librosa.effects.pitch_shift(final_audio, sr=sr_current, n_steps=pitch)
+            print(f"[INFO] | Pitch shifted by {pitch} semitones.")
+        else:
+            print("[INFO] | No pitch shift applied.")
+    except Exception as e:
+        print(f"[ERROR] | Pitch shifting failed: {e}")
+        
+    # Normalize the audio to ensure it's within [-1.0, 1.0]
+    max_val = np.max(np.abs(final_audio))
+    if max_val > 1.0:
+        final_audio = final_audio / max_val
+    print("[INFO] | Final audio normalized.")
+
+    # Save the audio to a temporary WAV file
+    print("[INFO] | Saving final audio to a temporary WAV file.")
     with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as tmp_file:
         sf.write(tmp_file.name, final_audio, sr_current, format='WAV')
-        return tmp_file.name
+        temp_file_path = tmp_file.name
+        
+    print(f"[INFO] | Final audio saved to {temp_file_path}")
+    
+    return temp_file_path
     
 def cloud():
     print("[CLOUD] | Space maintained.")