mirror of
https://github.com/deepseek-ai/Janus.git
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0cbf6f146b
- Added app_januspro_mps.py: optimized for Apple MPS, with automatic device selection - Fixed dtype mismatch issues in vq_model.py to ensure stability on MPS - Updated README.md to document MPS improvements and call for community testing - Contribution based on community testing and AI-assisted debugging
324 lines
10 KiB
Python
324 lines
10 KiB
Python
"""
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app_januspro_v4.py
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An updated version of your Janus Pro demo script forcing float16 on MPS,
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ensuring the main model and the vision submodule share the same dtype.
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"""
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import gradio as gr
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import torch
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from transformers import AutoConfig, AutoModelForCausalLM
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from janus.models import MultiModalityCausalLM, VLChatProcessor
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from janus.utils.io import load_pil_images
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from PIL import Image
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import numpy as np
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import os
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import time
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# 1. Detect device (cuda vs. mps vs. cpu)
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if torch.cuda.is_available():
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device = "cuda"
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elif torch.backends.mps.is_available():
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device = "mps"
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else:
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device = "cpu"
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# 2. Choose dtype
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# - We'll use bfloat16 on CUDA if you prefer that, but you can use float16 if desired.
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# - We force float16 on MPS to avoid any mismatch. CPU -> float32 fallback.
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if device == "cuda":
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dtype = torch.bfloat16 # or torch.float16 if you want half on CUDA
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elif device == "mps":
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dtype = torch.float16 # definitely float16 on Apple MPS to avoid mismatch
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else:
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dtype = torch.float32
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print(f"Using device = {device}, dtype = {dtype}")
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# 3. Load model config & model
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model_path = "deepseek-ai/Janus-Pro-7B"
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config = AutoConfig.from_pretrained(model_path)
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# If needed, force some config changes:
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language_config = config.language_config
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language_config._attn_implementation = 'eager'
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vl_gpt = AutoModelForCausalLM.from_pretrained(
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model_path,
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language_config=language_config,
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trust_remote_code=True
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)
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# 4. Move entire model to the chosen device & dtype
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vl_gpt = vl_gpt.to(device, dtype=dtype)
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# 4a. Explicitly recast the vision submodule in case it didn't propagate
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# This helps if the vision submodel is loaded or stored differently.
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if hasattr(vl_gpt, "gen_vision_model"):
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vl_gpt.gen_vision_model = vl_gpt.gen_vision_model.to(device, dtype=dtype)
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# Debug prints: just to confirm
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print(">>> Top-level param dtype:", next(vl_gpt.parameters()).dtype)
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print(">>> Vision model param dtype:",
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next(vl_gpt.gen_vision_model.parameters()).dtype if hasattr(vl_gpt, "gen_vision_model") else "N/A")
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# 5. Load processor
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vl_chat_processor = VLChatProcessor.from_pretrained(model_path)
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tokenizer = vl_chat_processor.tokenizer
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# 6. Utility to clear device cache (no-op for MPS/CPU)
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def clear_device_cache():
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if device == "cuda":
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torch.cuda.empty_cache()
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# 7. Unified seed setting
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def set_seed(seed: int):
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torch.manual_seed(seed)
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np.random.seed(seed)
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if device == "cuda":
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torch.cuda.manual_seed(seed)
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# 8. Multimodal Understanding
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@torch.inference_mode()
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def multimodal_understanding(image, question, seed, top_p, temperature):
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clear_device_cache()
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set_seed(int(seed))
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conversation = [
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{
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"role": "<|User|>",
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"content": f"<image_placeholder>\n{question}",
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"images": [image],
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},
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{"role": "<|Assistant|>", "content": ""},
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]
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pil_images = [Image.fromarray(image)]
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prepare_inputs = vl_chat_processor(
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conversations=conversation,
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images=pil_images,
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force_batchify=True
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).to(device=device, dtype=dtype)
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inputs_embeds = vl_gpt.prepare_inputs_embeds(**prepare_inputs)
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outputs = vl_gpt.language_model.generate(
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inputs_embeds=inputs_embeds,
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attention_mask=prepare_inputs.attention_mask,
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pad_token_id=tokenizer.eos_token_id,
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bos_token_id=tokenizer.bos_token_id,
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eos_token_id=tokenizer.eos_token_id,
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max_new_tokens=512,
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do_sample=(False if temperature == 0 else True),
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use_cache=True,
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temperature=temperature,
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top_p=top_p,
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)
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answer = tokenizer.decode(outputs[0].cpu().tolist(), skip_special_tokens=True)
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return answer
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# 9. Low-level image generation logic
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def generate(input_ids,
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width,
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height,
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temperature: float = 1,
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parallel_size: int = 2,
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cfg_weight: float = 5,
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image_token_num_per_image: int = 576,
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patch_size: int = 16):
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clear_device_cache()
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tokens = torch.zeros(
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(parallel_size * 2, len(input_ids)),
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dtype=torch.int,
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device=device
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)
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for i in range(parallel_size * 2):
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tokens[i, :] = input_ids
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if i % 2 != 0:
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tokens[i, 1:-1] = vl_chat_processor.pad_id
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inputs_embeds = vl_gpt.language_model.get_input_embeddings()(tokens)
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generated_tokens = torch.zeros(
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(parallel_size, image_token_num_per_image),
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dtype=torch.int,
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device=device
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)
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pkv = None
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for i in range(image_token_num_per_image):
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with torch.no_grad():
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outputs = vl_gpt.language_model.model(
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inputs_embeds=inputs_embeds,
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use_cache=True,
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past_key_values=pkv
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)
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pkv = outputs.past_key_values
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hidden_states = outputs.last_hidden_state
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logits = vl_gpt.gen_head(hidden_states[:, -1, :])
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# Conditioned vs. Unconditioned
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logit_cond = logits[0::2, :]
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logit_uncond = logits[1::2, :]
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# Classifier-free guidance
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logits = logit_uncond + cfg_weight * (logit_cond - logit_uncond)
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# Sample
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probs = torch.softmax(logits / temperature, dim=-1)
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next_token = torch.multinomial(probs, num_samples=1)
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generated_tokens[:, i] = next_token.squeeze(dim=-1)
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# Next token also goes to uncond
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next_token = torch.cat(
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[next_token.unsqueeze(dim=1), next_token.unsqueeze(dim=1)],
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dim=1
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).view(-1)
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img_embeds = vl_gpt.prepare_gen_img_embeds(next_token)
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# Force the correct dtype if needed
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if img_embeds.dtype != dtype:
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img_embeds = img_embeds.to(dtype)
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inputs_embeds = img_embeds.unsqueeze(dim=1)
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patches = vl_gpt.gen_vision_model.decode_code(
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generated_tokens.to(dtype=torch.int),
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shape=[parallel_size, 8, width // patch_size, height // patch_size]
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)
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return generated_tokens.to(dtype=torch.int), patches
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def unpack(dec, width, height, parallel_size=5):
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dec = dec.to(torch.float32).cpu().numpy().transpose(0, 2, 3, 1)
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dec = np.clip((dec + 1) / 2 * 255, 0, 255).astype(np.uint8)
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visual_img = np.zeros((parallel_size, width, height, 3), dtype=np.uint8)
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visual_img[:, :, :] = dec
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return visual_img
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# 10. Text-to-Image Generation
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@torch.inference_mode()
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def generate_image(prompt,
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seed=None,
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guidance=5,
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t2i_temperature=1.0):
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clear_device_cache()
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if seed is not None:
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set_seed(int(seed))
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width = 384
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height = 384
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parallel_size = 2
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with torch.no_grad():
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messages = [
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{'role': '<|User|>', 'content': prompt},
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{'role': '<|Assistant|>', 'content': ''}
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]
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text = vl_chat_processor.apply_sft_template_for_multi_turn_prompts(
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conversations=messages,
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sft_format=vl_chat_processor.sft_format,
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system_prompt=''
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)
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text = text + vl_chat_processor.image_start_tag
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input_ids = torch.LongTensor(tokenizer.encode(text)).to(device)
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output, patches = generate(
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input_ids,
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width=(width // 16 * 16),
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height=(height // 16 * 16),
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cfg_weight=guidance,
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parallel_size=parallel_size,
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temperature=t2i_temperature
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)
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images = unpack(
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patches,
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width=(width // 16 * 16),
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height=(height // 16 * 16),
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parallel_size=parallel_size
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)
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pil_images = [
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Image.fromarray(images[i]).resize((768, 768), Image.LANCZOS)
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for i in range(parallel_size)
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]
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return pil_images
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# 11. Gradio Interface
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with gr.Blocks() as demo:
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gr.Markdown(value="# Multimodal Understanding")
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with gr.Row():
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image_input = gr.Image()
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with gr.Column():
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question_input = gr.Textbox(label="Question")
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und_seed_input = gr.Number(label="Seed", precision=0, value=42)
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top_p = gr.Slider(minimum=0, maximum=1, value=0.95, step=0.05, label="top_p")
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temperature = gr.Slider(minimum=0, maximum=1, value=0.1, step=0.05, label="temperature")
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understanding_button = gr.Button("Chat")
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understanding_output = gr.Textbox(label="Response")
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examples_inpainting = gr.Examples(
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label="Multimodal Understanding examples",
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examples=[
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[
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"explain this meme",
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"images/doge.png",
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],
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[
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"Convert the formula into latex code.",
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"images/equation.png",
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],
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],
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inputs=[question_input, image_input],
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)
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gr.Markdown(value="# Text-to-Image Generation")
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with gr.Row():
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cfg_weight_input = gr.Slider(minimum=1, maximum=10, value=5, step=0.5, label="CFG Weight")
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t2i_temperature = gr.Slider(minimum=0, maximum=1, value=1.0, step=0.05, label="temperature")
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prompt_input = gr.Textbox(label="Prompt. (More detail => better images!)")
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seed_input = gr.Number(label="Seed (Optional)", precision=0, value=12345)
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generation_button = gr.Button("Generate Images")
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image_output = gr.Gallery(label="Generated Images", columns=2, rows=2, height=300)
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examples_t2i = gr.Examples(
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label="Text to image generation examples.",
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examples=[
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"Master shifu racoon wearing drip attire as a street gangster.",
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"The face of a beautiful girl",
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"Astronaut in a jungle, cold color palette, muted colors, detailed, 8k",
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"A glass of red wine on a reflective surface.",
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"A cute and adorable baby fox with big brown eyes...",
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"The image features an intricately designed eye set against a circular backdrop...",
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],
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inputs=prompt_input,
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)
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understanding_button.click(
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multimodal_understanding,
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inputs=[image_input, question_input, und_seed_input, top_p, temperature],
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outputs=understanding_output
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)
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generation_button.click(
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fn=generate_image,
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inputs=[prompt_input, seed_input, cfg_weight_input, t2i_temperature],
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outputs=image_output
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)
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demo.launch(share=True)
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