467 lines
23 KiB
Python
467 lines
23 KiB
Python
import discord
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from discord.ext import commands
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import asyncio
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import os
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import tempfile
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import wave # For saving audio data
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import functools # Added for partial
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import subprocess # For audio conversion
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from discord.ext import voice_recv # For receiving voice
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# Attempt to import STT and VAD libraries
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try:
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import whisper
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except ImportError:
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print("Whisper library not found. Please install with 'pip install openai-whisper'")
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whisper = None
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try:
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import webrtcvad
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except ImportError:
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print("webrtcvad library not found. Please install with 'pip install webrtc-voice-activity-detector'")
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webrtcvad = None
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# OpusDecoder is no longer needed as discord-ext-voice-recv provides PCM.
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FFMPEG_OPTIONS = {
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'before_options': '-reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5',
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'options': '-vn'
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}
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# Constants for audio processing
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SAMPLE_RATE = 16000 # Whisper prefers 16kHz
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CHANNELS = 1 # Mono
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SAMPLE_WIDTH = 2 # 16-bit audio (2 bytes per sample)
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VAD_MODE = 3 # VAD aggressiveness (0-3, 3 is most aggressive)
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FRAME_DURATION_MS = 30 # Duration of a frame in ms for VAD (10, 20, or 30)
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BYTES_PER_FRAME = (SAMPLE_RATE // 1000) * FRAME_DURATION_MS * CHANNELS * SAMPLE_WIDTH
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# OPUS constants removed as Opus decoding is no longer handled here.
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# Silence detection parameters
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SILENCE_THRESHOLD_FRAMES = 25 # Number of consecutive silent VAD frames to consider end of speech (e.g., 25 * 30ms = 750ms)
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MAX_SPEECH_DURATION_S = 15 # Max duration of a single speech segment to process
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MAX_SPEECH_FRAMES = (MAX_SPEECH_DURATION_S * 1000) // FRAME_DURATION_MS
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# Helper function for audio conversion
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def _convert_audio_to_16khz_mono(raw_pcm_data_48k_stereo: bytes) -> bytes:
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"""
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Converts raw 48kHz stereo PCM data to 16kHz mono PCM data using FFmpeg.
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"""
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input_temp_file = None
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output_temp_file = None
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converted_audio_data = b""
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try:
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with tempfile.NamedTemporaryFile(suffix=".raw", delete=False) as tmp_in:
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input_temp_file = tmp_in.name
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tmp_in.write(raw_pcm_data_48k_stereo)
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with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as tmp_out:
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output_temp_file = tmp_out.name
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command = [
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'ffmpeg',
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'-f', 's16le', # Input format: signed 16-bit little-endian PCM
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'-ac', '2', # Input channels: stereo
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'-ar', '48000', # Input sample rate: 48kHz
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'-i', input_temp_file,
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'-ac', str(CHANNELS), # Output channels (e.g., 1 for mono)
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'-ar', str(SAMPLE_RATE), # Output sample rate (e.g., 16000)
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'-sample_fmt', 's16',# Output sample format
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'-y', # Overwrite output file if it exists
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output_temp_file
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]
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process = subprocess.run(command, capture_output=True, check=False)
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if process.returncode != 0:
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print(f"FFmpeg error during audio conversion. Return code: {process.returncode}")
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print(f"FFmpeg stdout: {process.stdout.decode(errors='ignore')}")
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print(f"FFmpeg stderr: {process.stderr.decode(errors='ignore')}")
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return b""
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with open(output_temp_file, 'rb') as f_out:
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with wave.open(f_out, 'rb') as wf:
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if wf.getnchannels() == CHANNELS and \
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wf.getframerate() == SAMPLE_RATE and \
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wf.getsampwidth() == SAMPLE_WIDTH:
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converted_audio_data = wf.readframes(wf.getnframes())
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else:
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print(f"Warning: Converted WAV file format mismatch. Expected {CHANNELS}ch, {SAMPLE_RATE}Hz, {SAMPLE_WIDTH}bytes/sample.")
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print(f"Got: {wf.getnchannels()}ch, {wf.getframerate()}Hz, {wf.getsampwidth()}bytes/sample.")
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return b""
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except FileNotFoundError:
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print("FFmpeg command not found. Please ensure FFmpeg is installed and in your system's PATH.")
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return b""
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except Exception as e:
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print(f"Error during audio conversion: {e}")
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return b""
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finally:
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if input_temp_file and os.path.exists(input_temp_file):
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os.remove(input_temp_file)
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if output_temp_file and os.path.exists(output_temp_file):
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os.remove(output_temp_file)
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return converted_audio_data
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class VoiceAudioSink(voice_recv.AudioSink): # Inherit from voice_recv.AudioSink
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def __init__(self, cog_instance): # Removed voice_client parameter
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super().__init__()
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self.cog = cog_instance
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# self.voice_client is set by the library when listen() is called
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# user_audio_data now keyed by user_id, 'decoder' removed
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self.user_audio_data = {} # {user_id: {'buffer': bytearray, 'speaking': False, 'silent_frames': 0, 'speech_frames': 0, 'vad': VAD_instance}}
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# OpusDecoder check removed
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if not webrtcvad:
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print("VAD library not loaded. STT might be less efficient or not work as intended.")
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def wants_opus(self) -> bool:
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"""
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Indicates whether the sink wants Opus-encoded audio (True) or PCM audio (False).
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Our sink processes PCM data, so we return False.
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"""
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return False
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# Signature changed: user object directly, data is VoiceData
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def write(self, user: discord.User, voice_data_packet: voice_recv.VoiceData):
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if not webrtcvad or not self.voice_client or not user: # OpusDecoder check removed, user check added
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return
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user_id = user.id # Get user_id from the user object
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if user_id not in self.user_audio_data:
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self.user_audio_data[user_id] = {
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'buffer': bytearray(),
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'speaking': False,
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'silent_frames': 0,
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'speech_frames': 0,
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# 'decoder' removed
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'vad': webrtcvad.Vad(VAD_MODE) if webrtcvad else None
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}
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entry = self.user_audio_data[user_id]
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# Extract PCM data from VoiceData packet
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raw_pcm_data_48k_stereo = voice_data_packet.pcm
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# Convert incoming 48kHz stereo PCM to 16kHz mono PCM
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pcm_data = _convert_audio_to_16khz_mono(raw_pcm_data_48k_stereo)
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if not pcm_data: # Conversion failed or returned empty bytes
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# print(f"Audio conversion failed for user {user_id}. Skipping frame.")
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return
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# VAD processing expects frames of 10, 20, or 30 ms.
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# pcm_data is now 16kHz mono, hopefully in appropriate chunks from conversion.
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# We need to ensure it's split into VAD-compatible frame lengths if not already.
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# If pcm_data (now 16kHz mono) is a 20ms chunk, its length is 640 bytes.
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# A 10ms frame at 16kHz is 320 bytes. A 30ms frame is 960 bytes.
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# Ensure frame_length for VAD is correct (e.g. 20ms at 16kHz mono = 640 bytes)
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# This constant could be defined at class or module level.
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# For a 20ms frame, which is typical for voice packets:
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frame_length_for_vad_20ms = (SAMPLE_RATE // 1000) * 20 * CHANNELS * SAMPLE_WIDTH
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if len(pcm_data) % frame_length_for_vad_20ms != 0 and len(pcm_data) > 0 : # Check if it's a multiple, or handle if not.
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# This might happen if the converted chunk size isn't exactly what VAD expects per call.
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# For now, we'll try to process it. A more robust solution might buffer/segment pcm_data
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# into exact 10, 20, or 30ms chunks for VAD.
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# print(f"Warning: PCM data length {len(pcm_data)} after conversion is not an exact multiple of VAD frame size {frame_length_for_vad_20ms} for User {user_id}. Trying to process.")
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pass # Continue, VAD might handle it or error.
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# Process VAD in chunks if pcm_data is longer than one VAD frame
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# For simplicity, let's assume pcm_data is one processable chunk for now.
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# If pcm_data can be multiple VAD frames, iterate through it.
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# Current VAD logic processes the whole pcm_data chunk at once.
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# This is okay if pcm_data is already a single VAD frame (e.g. 20ms).
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if entry['vad']:
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try:
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# Ensure pcm_data is a valid frame for VAD (e.g. 10, 20, 30 ms)
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# If pcm_data is, for example, 640 bytes (20ms at 16kHz mono), it's fine.
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if len(pcm_data) == frame_length_for_vad_20ms: # Common case
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is_speech = entry['vad'].is_speech(pcm_data, SAMPLE_RATE)
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elif len(pcm_data) > 0 : # If not standard, but has data, try (might error)
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# print(f"VAD processing for User {user_id} with non-standard PCM length {len(pcm_data)}. May error.")
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# This path is risky if VAD is strict. For now, we assume it's handled or errors.
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# A robust way: segment pcm_data into valid VAD frames.
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# For now, let's assume the chunk from conversion is one such frame.
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is_speech = entry['vad'].is_speech(pcm_data, SAMPLE_RATE) # This might fail if len is not 10/20/30ms worth
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else: # No data
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is_speech = False
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except Exception as e: # webrtcvad can raise errors on invalid frame length
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# print(f"VAD error for User {user_id} with PCM length {len(pcm_data)}: {e}. Defaulting to speech=True for this frame.")
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is_speech = True # Fallback: if VAD fails, assume it's speech
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else: # No VAD
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is_speech = True
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if is_speech:
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entry['buffer'].extend(pcm_data)
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entry['speaking'] = True
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entry['silent_frames'] = 0
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entry['speech_frames'] += 1
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if entry['speech_frames'] >= MAX_SPEECH_FRAMES:
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# print(f"Max speech frames reached for User {user_id}. Processing segment.")
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self.cog.bot.loop.create_task(self.cog.process_audio_segment(user_id, bytes(entry['buffer']), self.voice_client.guild))
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entry['buffer'].clear()
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entry['speaking'] = False
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entry['speech_frames'] = 0
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elif entry['speaking']: # Was speaking, now silence
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entry['buffer'].extend(pcm_data) # Add this last silent frame for context
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entry['silent_frames'] += 1
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if entry['silent_frames'] >= SILENCE_THRESHOLD_FRAMES:
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# print(f"Silence threshold reached for User {user_id}. Processing segment.")
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self.cog.bot.loop.create_task(self.cog.process_audio_segment(user_id, bytes(entry['buffer']), self.voice_client.guild))
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entry['buffer'].clear()
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entry['speaking'] = False
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entry['speech_frames'] = 0
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entry['silent_frames'] = 0
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# If not is_speech and not entry['speaking'], do nothing (ignore silence)
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def cleanup(self):
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print("VoiceAudioSink cleanup called.")
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# Iterate over a copy of items if modifications occur, or handle user_id directly
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for user_id, data_entry in list(self.user_audio_data.items()):
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if data_entry['buffer']:
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# user object is not directly available here, but process_audio_segment takes user_id
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# We need the guild, which should be available from self.voice_client
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if self.voice_client and self.voice_client.guild:
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guild = self.voice_client.guild
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print(f"Processing remaining audio for User ID {user_id} on cleanup.")
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self.cog.bot.loop.create_task(self.cog.process_audio_segment(user_id, bytes(data_entry['buffer']), guild))
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else:
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print(f"Cannot process remaining audio for User ID {user_id}: voice_client or guild not available.")
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self.user_audio_data.clear()
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class VoiceGatewayCog(commands.Cog):
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def __init__(self, bot):
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self.bot = bot
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self.active_sinks = {} # guild_id: VoiceAudioSink
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self.whisper_model = None
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if whisper:
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try:
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# Load a smaller model initially, can be made configurable
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self.whisper_model = whisper.load_model("base")
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print("Whisper model 'base' loaded successfully.")
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except Exception as e:
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print(f"Error loading Whisper model: {e}. STT will not be available.")
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self.whisper_model = None
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else:
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print("Whisper library not available. STT functionality will be disabled.")
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async def cog_load(self):
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print("VoiceGatewayCog loaded!")
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async def cog_unload(self):
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print("Unloading VoiceGatewayCog...")
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# Disconnect from all voice channels and clean up sinks
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for vc in list(self.bot.voice_clients): # Iterate over a copy
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guild_id = vc.guild.id
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if guild_id in self.active_sinks:
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# Ensure vc is an instance of VoiceRecvClient or compatible for stop_listening
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if vc.is_connected() and hasattr(vc, 'is_listening') and vc.is_listening():
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# Check if stop_listening exists, VoiceRecvClient might have different API
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if hasattr(vc, 'stop_listening'):
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vc.stop_listening()
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else: # Or equivalent for VoiceRecvClient
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pass # May need specific cleanup for voice_recv
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self.active_sinks[guild_id].cleanup()
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del self.active_sinks[guild_id]
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if vc.is_connected():
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await vc.disconnect(force=True)
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print("VoiceGatewayCog unloaded and disconnected from voice channels.")
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async def connect_to_voice(self, channel: discord.VoiceChannel):
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"""Connects the bot to a specified voice channel and starts listening."""
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if not channel:
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return None, "Channel not provided."
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guild = channel.guild
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voice_client = guild.voice_client # This will be VoiceRecvClient if already connected by this cog
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if voice_client and voice_client.is_connected():
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if voice_client.channel == channel:
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print(f"Already connected to {channel.name} in {guild.name}.")
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# Ensure listening is active if already connected
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# Check if it's a VoiceRecvClient instance
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if isinstance(voice_client, voice_recv.VoiceRecvClient):
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if guild.id not in self.active_sinks or not voice_client.is_listening():
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self.start_listening_for_vc(voice_client)
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else: # If it's a regular VoiceClient, we need to reconnect with VoiceRecvClient
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print(f"Reconnecting with VoiceRecvClient to {channel.name}.")
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await voice_client.disconnect(force=True)
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try: # Reconnect with VoiceRecvClient
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voice_client = await channel.connect(cls=voice_recv.VoiceRecvClient, timeout=10.0)
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print(f"Reconnected to {channel.name} in {guild.name} with VoiceRecvClient.")
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self.start_listening_for_vc(voice_client)
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except asyncio.TimeoutError:
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return None, f"Timeout trying to reconnect to {channel.name} with VoiceRecvClient."
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except Exception as e:
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return None, f"Error reconnecting to {channel.name} with VoiceRecvClient: {str(e)}"
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return voice_client, "Already connected to this channel."
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else:
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# Handling move_to for VoiceRecvClient might need care.
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# Simplest: disconnect and reconnect with VoiceRecvClient to the new channel.
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print(f"Moving to {channel.name} in {guild.name}. Reconnecting with VoiceRecvClient.")
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await voice_client.disconnect(force=True)
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try:
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voice_client = await channel.connect(cls=voice_recv.VoiceRecvClient, timeout=10.0)
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print(f"Moved and reconnected to {channel.name} in {guild.name} with VoiceRecvClient.")
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self.start_listening_for_vc(voice_client)
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except asyncio.TimeoutError:
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return None, f"Timeout trying to move and connect to {channel.name}."
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except Exception as e:
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return None, f"Error moving and connecting to {channel.name}: {str(e)}"
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else:
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try:
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# Connect using VoiceRecvClient
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voice_client = await channel.connect(cls=voice_recv.VoiceRecvClient, timeout=10.0)
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print(f"Connected to {channel.name} in {guild.name} with VoiceRecvClient.")
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self.start_listening_for_vc(voice_client)
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except asyncio.TimeoutError:
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return None, f"Timeout trying to connect to {channel.name}."
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except Exception as e:
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return None, f"Error connecting to {channel.name}: {str(e)}"
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if not voice_client: # Should not happen if connect succeeded
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return None, "Failed to establish voice client after connection."
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return voice_client, f"Successfully connected and listening in {channel.name}."
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def start_listening_for_vc(self, voice_client: discord.VoiceClient):
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"""Starts or restarts listening for a given voice client."""
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guild_id = voice_client.guild.id
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if guild_id in self.active_sinks:
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# If sink exists, ensure it's clean and listening is (re)started
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if voice_client.is_listening():
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voice_client.stop_listening() # Stop previous listening if any
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self.active_sinks[guild_id].cleanup() # Clean old state
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# Re-initialize or ensure the sink is fresh for the current VC
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self.active_sinks[guild_id] = VoiceAudioSink(self)
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else:
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self.active_sinks[guild_id] = VoiceAudioSink(self)
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if not voice_client.is_listening():
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voice_client.listen(self.active_sinks[guild_id])
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print(f"Started listening in {voice_client.channel.name} for guild {guild_id}")
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else:
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print(f"Already listening in {voice_client.channel.name} for guild {guild_id}")
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async def disconnect_from_voice(self, guild: discord.Guild):
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"""Disconnects the bot from the voice channel in the given guild."""
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voice_client = guild.voice_client
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if voice_client and voice_client.is_connected():
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if voice_client.is_listening():
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voice_client.stop_listening()
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guild_id = guild.id
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if guild_id in self.active_sinks:
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self.active_sinks[guild_id].cleanup()
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del self.active_sinks[guild_id]
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await voice_client.disconnect(force=True)
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print(f"Disconnected from voice in {guild.name}.")
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return True, f"Disconnected from voice in {guild.name}."
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return False, "Not connected to voice in this guild."
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async def play_audio_file(self, voice_client: discord.VoiceClient, audio_file_path: str):
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"""Plays an audio file in the voice channel."""
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if not voice_client or not voice_client.is_connected():
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print("Error: Voice client not connected.")
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return False, "Voice client not connected."
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if not os.path.exists(audio_file_path):
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print(f"Error: Audio file not found at {audio_file_path}")
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return False, "Audio file not found."
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if voice_client.is_playing():
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voice_client.stop() # Stop current audio if any
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try:
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audio_source = discord.FFmpegPCMAudio(audio_file_path, **FFMPEG_OPTIONS)
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voice_client.play(audio_source, after=lambda e: self.after_audio_playback(e, audio_file_path))
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print(f"Playing audio: {audio_file_path}")
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return True, f"Playing {os.path.basename(audio_file_path)}"
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except Exception as e:
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print(f"Error creating/playing FFmpegPCMAudio source for {audio_file_path}: {e}")
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return False, f"Error playing audio: {str(e)}"
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def after_audio_playback(self, error, audio_file_path):
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if error:
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print(f"Error during audio playback for {audio_file_path}: {error}")
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else:
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print(f"Finished playing {audio_file_path}")
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# TTSProviderCog's cleanup will handle deleting the file.
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# Removed start_listening_pipeline as the sink now handles more logic directly or via tasks.
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async def process_audio_segment(self, user_id: int, audio_data: bytes, guild: discord.Guild):
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"""Processes a segment of audio data using Whisper."""
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if not self.whisper_model or not audio_data: # also check if audio_data is empty
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if not audio_data: print(f"process_audio_segment called for user {user_id} with empty audio_data.")
|
|
return
|
|
|
|
# Save audio_data (PCM) to a temporary WAV file
|
|
# Whisper expects a file path or a NumPy array.
|
|
# Using a temporary file is straightforward.
|
|
try:
|
|
with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as tmp_wav:
|
|
wav_file_path = tmp_wav.name
|
|
wf = wave.open(tmp_wav, 'wb')
|
|
wf.setnchannels(CHANNELS)
|
|
wf.setsampwidth(SAMPLE_WIDTH)
|
|
wf.setframerate(SAMPLE_RATE)
|
|
wf.writeframes(audio_data)
|
|
wf.close()
|
|
|
|
# Transcribe using Whisper (this can be blocking, run in executor)
|
|
# Use functools.partial to pass keyword arguments to the transcribe method
|
|
transcribe_func = functools.partial(self.whisper_model.transcribe, wav_file_path, fp16=False)
|
|
result = await self.bot.loop.run_in_executor(
|
|
None, # Default ThreadPoolExecutor
|
|
transcribe_func
|
|
)
|
|
transcribed_text = result["text"].strip()
|
|
|
|
if transcribed_text: # Only dispatch if there's actual text
|
|
user = guild.get_member(user_id) or await self.bot.fetch_user(user_id)
|
|
print(f"Transcription for {user.name} ({user_id}) in {guild.name}: {transcribed_text}")
|
|
self.bot.dispatch("voice_transcription_received", guild, user, transcribed_text)
|
|
|
|
except Exception as e:
|
|
print(f"Error processing audio segment for user {user_id}: {e}")
|
|
finally:
|
|
if 'wav_file_path' in locals() and os.path.exists(wav_file_path):
|
|
os.remove(wav_file_path)
|
|
|
|
|
|
async def setup(bot: commands.Bot):
|
|
# Check for FFmpeg before adding cog
|
|
try:
|
|
# Try running ffmpeg -version to check if it's installed and in PATH
|
|
process = await asyncio.create_subprocess_shell(
|
|
"ffmpeg -version",
|
|
stdout=asyncio.subprocess.PIPE,
|
|
stderr=asyncio.subprocess.PIPE
|
|
)
|
|
stdout, stderr = await process.communicate()
|
|
if process.returncode == 0:
|
|
print("FFmpeg found. VoiceGatewayCog can be loaded.")
|
|
await bot.add_cog(VoiceGatewayCog(bot))
|
|
print("VoiceGatewayCog loaded successfully!")
|
|
else:
|
|
print("FFmpeg not found or not working correctly. VoiceGatewayCog will not be loaded.")
|
|
print(f"FFmpeg check stdout: {stdout.decode(errors='ignore')}")
|
|
print(f"FFmpeg check stderr: {stderr.decode(errors='ignore')}")
|
|
|
|
except FileNotFoundError:
|
|
print("FFmpeg command not found. VoiceGatewayCog will not be loaded. Please install FFmpeg and ensure it's in your system's PATH.")
|
|
except Exception as e:
|
|
print(f"An error occurred while checking for FFmpeg: {e}. VoiceGatewayCog will not be loaded.")
|