feat: implement accumulative LLM paragraph engine and harden 4-process pipeline
This commit is contained in:
Adolfo Reyna
+103
-90
@@ -1,65 +1,56 @@
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import sys
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from unittest.mock import MagicMock
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# Comprehensive workaround for missing _lzma in some Python builds
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# MANDATORY: Mock lzma BEFORE any other imports (especially pyannote/torchvision)
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try:
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import lzma
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except ImportError:
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mock_lzma = MagicMock()
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mock_lzma.FORMAT_XZ = 1
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mock_lzma.FORMAT_ALONE = 2
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mock_lzma.FORMAT_RAW = 3
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mock_lzma.CHECK_NONE = 0
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mock_lzma.CHECK_CRC32 = 1
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mock_lzma.CHECK_CRC64 = 4
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mock_lzma.CHECK_SHA256 = 10
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mock_lzma.FORMAT_XZ, mock_lzma.FORMAT_ALONE, mock_lzma.FORMAT_RAW = 1, 2, 3
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mock_lzma.CHECK_NONE, mock_lzma.CHECK_CRC32, mock_lzma.CHECK_CRC64, mock_lzma.CHECK_SHA256 = 0, 1, 4, 10
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sys.modules["_lzma"] = MagicMock()
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sys.modules["lzma"] = mock_lzma
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import time
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import os
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import numpy as np
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import sounddevice as sd
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import torch
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import mlx_whisper
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from silero_vad import load_silero_vad, get_speech_timestamps
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from pyannote.audio import Pipeline
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import queue
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import argparse
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# Audio Constants
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SAMPLERATE = 16000
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BLOCK_SIZE = 512
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VAD_THRESHOLD = 0.5
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def transcribe_with_controls(audio, transcribe_kwargs):
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"""Call mlx_whisper.transcribe with graceful fallback for unsupported args."""
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def list_audio_devices():
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try:
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return mlx_whisper.transcribe(audio, **transcribe_kwargs)
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except Exception as exc:
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message = str(exc)
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if "beam_size" in transcribe_kwargs:
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transcribe_kwargs.pop("beam_size")
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return mlx_whisper.transcribe(audio, **transcribe_kwargs)
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raise exc
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import sounddevice as sd
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print("\nAvailable Audio Devices:")
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print(sd.query_devices())
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except ImportError:
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print("[Error] sounddevice not installed. Cannot list devices.")
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def audio_callback(indata, frames, time, status, audio_queue):
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if status:
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print(status, file=sys.stderr)
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audio_queue.put(indata.copy())
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def assign_speakers_to_segments(segments, diarization):
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if not diarization or not segments:
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def assign_speakers_to_segments(segments, diarization_result):
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if not diarization_result or not segments:
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return segments
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# pyannote 4.0.4 returns a DiarizeOutput object with a speaker_diarization attribute
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annotation = None
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if hasattr(diarization_result, 'speaker_diarization'):
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annotation = diarization_result.speaker_diarization
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elif hasattr(diarization_result, 'itertracks'):
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annotation = diarization_result
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if annotation is None:
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return segments
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for segment in segments:
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segment_start, segment_end = segment['start'], segment['end']
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segment_start, segment_end = segment.get('start', 0), segment.get('end', 0)
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speaker_intersections = {}
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for turn, _, speaker in diarization.itertracks(yield_label=True):
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intersection_start = max(segment_start, turn.start)
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intersection_end = min(segment_end, turn.end)
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if intersection_end > intersection_start:
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duration = intersection_end - intersection_start
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speaker_intersections[speaker] = speaker_intersections.get(speaker, 0) + duration
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try:
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for turn, _, speaker in annotation.itertracks(yield_label=True):
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intersection_start = max(segment_start, turn.start)
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intersection_end = min(segment_end, turn.end)
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if intersection_end > intersection_start:
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duration = intersection_end - intersection_start
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speaker_intersections[speaker] = speaker_intersections.get(speaker, 0) + duration
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except Exception:
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continue
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if speaker_intersections:
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segment['speaker'] = max(speaker_intersections, key=speaker_intersections.get)
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else:
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@@ -67,6 +58,24 @@ def assign_speakers_to_segments(segments, diarization):
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return segments
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def run_transcription(out_queue, args):
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import numpy as np
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import sounddevice as sd
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import torch
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import mlx_whisper
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from silero_vad import load_silero_vad, get_speech_timestamps
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import queue
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SAMPLERATE, BLOCK_SIZE, VAD_THRESHOLD = 16000, 512, 0.5
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def transcribe_with_controls(audio, transcribe_kwargs):
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try:
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return mlx_whisper.transcribe(audio, **transcribe_kwargs)
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except Exception as exc:
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if "beam_size" in transcribe_kwargs:
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transcribe_kwargs.pop("beam_size")
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return mlx_whisper.transcribe(audio, **transcribe_kwargs)
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raise exc
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device = "mps" if torch.backends.mps.is_available() else "cpu"
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model_name = args.model
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if args.quantize and "4bit" not in model_name:
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@@ -77,100 +86,104 @@ def run_transcription(out_queue, args):
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diarization_pipeline = None
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if args.speaker_diarization:
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from pyannote.audio import Pipeline
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print("[Transcribe] Loading speaker diarization pipeline...")
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hf_token = os.environ.get("HF_TOKEN")
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try:
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diarization_pipeline = Pipeline.from_pretrained("pyannote/speaker-diarization-3.1", use_auth_token=hf_token)
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diarization_pipeline = Pipeline.from_pretrained("pyannote/speaker-diarization-3.1", token=hf_token)
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diarization_pipeline.to(torch.device(device))
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except Exception as e:
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print(f"[Transcribe] Diarization load failed: {e}")
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audio_queue = queue.Queue()
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device_index = args.device
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def audio_callback(indata, frames, time, status):
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if status: print(status, file=sys.stderr)
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audio_queue.put(indata.copy())
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def callback_wrapper(indata, frames, time, status):
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audio_callback(indata, frames, time, status, audio_queue)
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audio_buffer = []
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speech_started = False
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buffer_limit = SAMPLERATE * args.max_buffer
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rolling_context = ""
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audio_buffer, speech_started, rolling_context = [], False, ""
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last_stream_time = time.time()
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print(f"[Transcribe] Audio stream ready on device {device_index}.")
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try:
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with sd.InputStream(samplerate=SAMPLERATE, channels=args.channels, callback=callback_wrapper, blocksize=BLOCK_SIZE, device=device_index):
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with sd.InputStream(samplerate=SAMPLERATE, channels=args.channels, callback=audio_callback, blocksize=BLOCK_SIZE, device=args.device):
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while True:
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while not audio_queue.empty():
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data = audio_queue.get()
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if args.channels > 1: data = np.mean(data, axis=1)
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audio_buffer.append(data.flatten())
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if data is not None and data.size > 0:
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if args.channels > 1:
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data = np.mean(data, axis=1)
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audio_buffer.append(data.flatten())
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if audio_buffer:
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current_audio = np.concatenate(audio_buffer)
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audio_tensor = torch.from_numpy(current_audio)
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buffer_duration = len(current_audio) / SAMPLERATE
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speech_timestamps = get_speech_timestamps(audio_tensor, vad_model, sampling_rate=SAMPLERATE, threshold=VAD_THRESHOLD, min_silence_duration_ms=args.silence)
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if speech_timestamps:
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speech_started = True
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last_end = speech_timestamps[-1]['end']
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buffer_len_samples = len(current_audio)
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# Check for flush
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if (buffer_len_samples - last_end) > (SAMPLERATE * args.silence / 1000) or buffer_len_samples > buffer_limit:
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if (len(current_audio) - speech_timestamps[-1]['end']) > (SAMPLERATE * args.silence / 1000) or len(current_audio) > (SAMPLERATE * args.max_buffer):
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# STEP 1: ALWAYS TRANSCRIBE FIRST
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transcribe_kwargs = {
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"path_or_hf_repo": model_name,
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"temperature": args.temperature_fallback,
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"word_timestamps": args.speaker_diarization,
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"word_timestamps": True,
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"logprob_threshold": args.logprob_threshold,
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"compression_ratio_threshold": args.compression_threshold,
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}
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if args.lang: transcribe_kwargs["language"] = args.lang
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if args.context and rolling_context: transcribe_kwargs["initial_prompt"] = rolling_context
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result = transcribe_with_controls(current_audio, transcribe_kwargs)
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text = result['text'].strip()
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detected_lang = result.get('language', args.lang or 'en')
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if args.filter_lang and args.lang and detected_lang != args.lang:
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print(f"[Transcribe] Filtered {detected_lang}")
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text = ""
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res_asr = transcribe_with_controls(current_audio, transcribe_kwargs)
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text = res_asr['text'].strip()
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detected_lang = res_asr.get('language', args.lang or 'en')
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if text:
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segments = result.get('segments', [])
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english_text = text
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if detected_lang != "en" or args.lang == 'en':
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if detected_lang != "en":
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bridge_kwargs = transcribe_kwargs.copy()
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bridge_kwargs["task"] = "translate"
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res_bridge = transcribe_with_controls(current_audio, bridge_kwargs)
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english_text = res_bridge['text'].strip()
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speaker_label = None
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if diarization_pipeline:
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audio_for_diarization = torch.from_numpy(current_audio).float().unsqueeze(0)
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try:
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diarization_result = diarization_pipeline({"waveform": audio_for_diarization, "sample_rate": SAMPLERATE})
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segments = assign_speakers_to_speakers(segments, diarization_result)
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except: pass
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diar_out = diarization_pipeline({"waveform": torch.from_numpy(current_audio).float().unsqueeze(0), "sample_rate": SAMPLERATE})
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asr_segments = res_asr.get('segments', [])
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diarized_segments = assign_speakers_to_segments(asr_segments, diar_out)
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speakers = [s.get('speaker') for s in diarized_segments if s.get('speaker') and s.get('speaker') != 'UNKNOWN']
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if speakers:
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from collections import Counter
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speaker_label = Counter(speakers).most_common(1)[0][0]
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except Exception as diar_err:
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print(f"[Transcribe] Diarization error: {diar_err}")
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out_queue.put({
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"original": text,
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"en_bridge": english_text,
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"detected_lang": detected_lang,
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"speaker": speaker_label,
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"ts": time.time()
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})
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out_queue.put({"original": text, "detected_lang": detected_lang, "segments": segments, "ts": time.time()})
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print(f"[Transcribe] {detected_lang.upper()}: {text}")
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speaker_tag = f" ({speaker_label})" if speaker_label else ""
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print(f"[Transcribe] {detected_lang.upper()}{speaker_tag}: {text}")
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if args.context: rolling_context = (rolling_context + " " + text)[-200:].strip()
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audio_buffer = []
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speech_started = False
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audio_buffer, speech_started = [], False
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elif args.stream and (time.time() - last_stream_time) > 1.5:
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# Draft Mode
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draft_kwargs = {"path_or_hf_repo": model_name, "temperature": 0.0}
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if args.lang: draft_kwargs["language"] = args.lang
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if args.context and rolling_context: draft_kwargs["initial_prompt"] = rolling_context
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draft_result = transcribe_with_controls(current_audio, draft_kwargs)
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draft_text = draft_result['text'].strip()
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if draft_text:
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out_queue.put({"draft": draft_text, "ts": time.time()})
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draft_result = transcribe_with_controls(current_audio, {"path_or_hf_repo": model_name, "temperature": 0.0})
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if draft_result['text'].strip():
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out_queue.put({"draft": draft_result['text'].strip(), "ts": time.time()})
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last_stream_time = time.time()
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elif not speech_started and len(current_audio) > SAMPLERATE * 2:
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audio_buffer = []
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except KeyboardInterrupt: pass
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except Exception as e: print(f"[Transcribe] Error: {e}")
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if __name__ == "__main__":
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