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{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Collecting fastapi (from -r requirements.txt (line 1))\n",
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      "Using cached sniffio-1.3.1-py3-none-any.whl (10 kB)\n",
      "Installing collected packages: mpmath, urllib3, tqdm, sympy, sniffio, safetensors, regex, pyyaml, python-multipart, pydantic-core, pycparser, pillow, numpy, networkx, MarkupSafe, idna, h11, future, fsspec, filelock, click, charset-normalizer, certifi, annotated-types, uvicorn, requests, pydantic, jinja2, ffmpeg-python, cffi, anyio, torch, starlette, PySoundFile, huggingface-hub, torchvision, torchaudio, tokenizers, fastapi, transformers\n",
      "Successfully installed MarkupSafe-3.0.2 PySoundFile-0.9.0.post1 annotated-types-0.7.0 anyio-4.7.0 certifi-2024.12.14 cffi-1.17.1 charset-normalizer-3.4.0 click-8.1.7 fastapi-0.115.6 ffmpeg-python-0.2.0 filelock-3.16.1 fsspec-2024.10.0 future-1.0.0 h11-0.14.0 huggingface-hub-0.27.0 idna-3.10 jinja2-3.1.4 mpmath-1.3.0 networkx-3.4.2 numpy-2.2.0 pillow-11.0.0 pycparser-2.22 pydantic-2.10.3 pydantic-core-2.27.1 python-multipart-0.0.19 pyyaml-6.0.2 regex-2024.11.6 requests-2.32.3 safetensors-0.4.5 sniffio-1.3.1 starlette-0.41.3 sympy-1.13.1 tokenizers-0.21.0 torch-2.5.1 torchaudio-2.5.1 torchvision-0.20.1 tqdm-4.67.1 transformers-4.47.0 urllib3-2.2.3 uvicorn-0.34.0\n",
      "Note: you may need to restart the kernel to use updated packages.\n"
     ]
    }
   ],
   "source": [
    "pip install -r requirements.txt"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['soundfile']\n"
     ]
    }
   ],
   "source": [
    "import torchaudio\n",
    "print(str(torchaudio.list_audio_backends()))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Note: you may need to restart the kernel to use updated packages.\n"
     ]
    }
   ],
   "source": [
    "pip list --format=freeze > requirements.txt"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "<>:13: SyntaxWarning: invalid escape sequence '\\m'\n",
      "<>:17: SyntaxWarning: invalid escape sequence '\\H'\n",
      "<>:13: SyntaxWarning: invalid escape sequence '\\m'\n",
      "<>:17: SyntaxWarning: invalid escape sequence '\\H'\n",
      "C:\\Users\\Asus\\AppData\\Local\\Temp\\ipykernel_18220\\208613059.py:13: SyntaxWarning: invalid escape sequence '\\m'\n",
      "  model_path = \"Deepfake\\model\"\n",
      "C:\\Users\\Asus\\AppData\\Local\\Temp\\ipykernel_18220\\208613059.py:17: SyntaxWarning: invalid escape sequence '\\H'\n",
      "  cache_dir=\"D:\\HuggingFace\",\n"
     ]
    }
   ],
   "source": [
    "from transformers import pipeline\n",
    "from transformers import AutoProcessor, AutoModelForAudioClassification\n",
    "from fastapi import FastAPI\n",
    "from pydantic import BaseModel\n",
    "import uvicorn\n",
    "import torchaudio\n",
    "import torch\n",
    "\n",
    "# Define the input schema\n",
    "class InputData(BaseModel):\n",
    "    input: str\n",
    "\n",
    "model_path = \"Deepfake\\model\"\n",
    "processor = AutoProcessor.from_pretrained(model_path)\n",
    "# Instantiate the model\n",
    "model = AutoModelForAudioClassification.from_pretrained(pretrained_model_name_or_path=model_path,\n",
    "                                               cache_dir=\"D:\\HuggingFace\",\n",
    "                                               local_files_only=True,\n",
    "                                               )\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Functions"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [],
   "source": [
    "def prepare_audio(file_path, sampling_rate=16000, duration=10):\n",
    "    \"\"\"\n",
    "    Prepares audio by loading, resampling, and returning it in manageable chunks.\n",
    "    \n",
    "    Parameters:\n",
    "    - file_path: Path to the audio file.\n",
    "    - sampling_rate: Target sampling rate for the audio.\n",
    "    - duration: Duration in seconds for each chunk.\n",
    "    \n",
    "    Returns:\n",
    "    - A list of audio chunks, each as a numpy array.\n",
    "    \"\"\"\n",
    "    # Load and resample the audio file\n",
    "    waveform, original_sampling_rate = torchaudio.load(file_path)\n",
    "    \n",
    "    # Convert stereo to mono if necessary\n",
    "    if waveform.shape[0] > 1:  # More than 1 channel\n",
    "        waveform = torch.mean(waveform, dim=0, keepdim=True)\n",
    "    \n",
    "    # Resample if needed\n",
    "    if original_sampling_rate != sampling_rate:\n",
    "        resampler = torchaudio.transforms.Resample(orig_freq=original_sampling_rate, new_freq=sampling_rate)\n",
    "        waveform = resampler(waveform)\n",
    "    \n",
    "    # Calculate chunk size in samples\n",
    "    chunk_size = sampling_rate * duration\n",
    "    audio_chunks = []\n",
    "\n",
    "    # Split the audio into chunks\n",
    "    for start in range(0, waveform.shape[1], chunk_size):\n",
    "        chunk = waveform[:, start:start + chunk_size]\n",
    "        \n",
    "        # Pad the last chunk if it's shorter than the chunk size\n",
    "        if chunk.shape[1] < chunk_size:\n",
    "            padding = chunk_size - chunk.shape[1]\n",
    "            chunk = torch.nn.functional.pad(chunk, (0, padding))\n",
    "        \n",
    "        audio_chunks.append(chunk.squeeze().numpy())\n",
    "    \n",
    "    return audio_chunks\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [],
   "source": [
    "import torch.nn.functional as F\n",
    "\n",
    "def predict_audio(file_path):\n",
    "    \"\"\"\n",
    "    Predicts the class of an audio file by aggregating predictions from chunks and calculates confidence.\n",
    "    \n",
    "    Args:\n",
    "        file_path (str): Path to the audio file.\n",
    "\n",
    "    Returns:\n",
    "        dict: Contains the predicted class label and average confidence score.\n",
    "    \"\"\"\n",
    "    # Prepare audio chunks\n",
    "    audio_chunks = prepare_audio(file_path)\n",
    "    predictions = []\n",
    "    confidences = []\n",
    "\n",
    "    for i, chunk in enumerate(audio_chunks):\n",
    "        # Prepare input for the model\n",
    "        inputs = processor(\n",
    "            chunk, sampling_rate=16000, return_tensors=\"pt\", padding=True\n",
    "        )\n",
    "        \n",
    "        # Perform inference\n",
    "        with torch.no_grad():\n",
    "            outputs = model(**inputs)\n",
    "            logits = outputs.logits\n",
    "            \n",
    "            # Apply softmax to calculate probabilities\n",
    "            probabilities = F.softmax(logits, dim=1)\n",
    "            \n",
    "            # Get the predicted class and its confidence\n",
    "            confidence, predicted_class = torch.max(probabilities, dim=1)\n",
    "            predictions.append(predicted_class.item())\n",
    "            confidences.append(confidence.item())\n",
    "    \n",
    "    # Aggregate predictions (majority voting)\n",
    "    aggregated_prediction_id = max(set(predictions), key=predictions.count)\n",
    "    predicted_label = model.config.id2label[aggregated_prediction_id]\n",
    "    \n",
    "    # Calculate average confidence across chunks\n",
    "    average_confidence = sum(confidences) / len(confidences)\n",
    "\n",
    "    return {\n",
    "        \"predicted_label\": predicted_label,\n",
    "        \"average_confidence\": average_confidence\n",
    "    }\n",
    "\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Chunk shape: (160000,)\n",
      "Chunk shape: (160000,)\n",
      "Chunk shape: (160000,)\n",
      "Chunk shape: (160000,)\n",
      "Chunk shape: (160000,)\n",
      "Chunk shape: (160000,)\n",
      "Chunk shape: (160000,)\n",
      "Chunk shape: (160000,)\n",
      "Chunk shape: (160000,)\n",
      "Chunk shape: (160000,)\n",
      "Predicted Class: {'predicted_label': 'Real', 'average_confidence': 0.9984144032001495}\n"
     ]
    },
    {
     "ename": "",
     "evalue": "",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31mThe Kernel crashed while executing code in the current cell or a previous cell. \n",
      "\u001b[1;31mPlease review the code in the cell(s) to identify a possible cause of the failure. \n",
      "\u001b[1;31mClick <a href='https://aka.ms/vscodeJupyterKernelCrash'>here</a> for more info. \n",
      "\u001b[1;31mView Jupyter <a href='command:jupyter.viewOutput'>log</a> for further details."
     ]
    }
   ],
   "source": [
    "# Example: Test a single audio file\n",
    "file_path = r\"D:\\repos\\GODAM\\audioFiles\\test.wav\"  # Replace with your audio file path\n",
    "predicted_class = predict_audio(file_path)\n",
    "print(f\"Predicted Class: {predicted_class}\")"
   ]
  }
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