audio_capture.py

# audio_capture.py (Updated with SoundDevice)
import sounddevice as sd
import numpy as np
import wave
import os
from datetime import datetime
import config

class AudioRecorder:
    def __init__(self):
        self.is_recording = False
        self.sample_rate = config.SAMPLE_RATE
        self.filename = f"meeting_{datetime.now().strftime('%Y%m%d_%H%M%S')}.wav"
        self.audio_buffer = []
        self.stream = None
        
    def start_recording(self):
        self.is_recording = True
        self.audio_buffer = []
        
        def callback(indata, frames, time, status):
            if status:
                print(f"Audio error: {status}")
            if self.is_recording:
                self.audio_buffer.append(indata.copy())
        
        self.stream = sd.InputStream(
            samplerate=self.sample_rate,
            channels=config.CHANNELS,
            callback=callback,
            dtype='int16'
        )
        self.stream.start()
        return True
        
    def get_audio_chunk(self):
        # In this implementation, we don't need to return chunks because
        # we are using a callback. But to keep the interface, we return the last chunk.
        if self.is_recording and self.audio_buffer:
            return self.audio_buffer[-1]
        return None
        
    def stop_recording(self):
        if self.is_recording:
            self.is_recording = False
            self.stream.stop()
            self.stream.close()
            self._save_recording()
            return os.path.join(config.RECORDINGS_DIR, self.filename)
        return None
        
    def _save_recording(self):
        os.makedirs(config.RECORDINGS_DIR, exist_ok=True)
        audio_data = np.concatenate(self.audio_buffer, axis=0)
        with wave.open(os.path.join(config.RECORDINGS_DIR, self.filename), 'wb') as wf:
            wf.setnchannels(config.CHANNELS)
            wf.setsampwidth(2)  # 2 bytes for int16
            wf.setframerate(self.sample_rate)
            wf.writeframes(audio_data.tobytes())