File size: 4,073 Bytes
8b80b8c dde3768 8b80b8c dde3768 70fccfa dde3768 70fccfa dde3768 8b80b8c 70fccfa 7c483bf 8b80b8c 7c483bf 8b80b8c 7c483bf 70fccfa 7c483bf 8b80b8c 7c483bf 70fccfa 22e4707 8b80b8c 22e4707 8b80b8c 22e4707 8b80b8c 22e4707 8b80b8c 22e4707 8b80b8c 70fccfa 8b80b8c dde3768 8b80b8c dde3768 8b80b8c dde3768 8b80b8c dde3768 8b80b8c dde3768 8b80b8c 5295d97 8b80b8c 5295d97 8b80b8c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 | from fastapi import FastAPI, BackgroundTasks, HTTPException
from fastapi.responses import FileResponse
import threading
import queue
import uuid
import os
import time
import audiocraft
from audiocraft.models import MusicGen
from audiocraft.data.audio import audio_write
print("Audiocraft version:", audiocraft.__version__)
app = FastAPI()
MODEL_NAME = "facebook/musicgen-small"
OUTPUT_DIR = "outputs"
os.makedirs(OUTPUT_DIR, exist_ok=True)
print("Loading MusicGen model...")
model = MusicGen.get_pretrained(MODEL_NAME)
model.set_generation_params(
duration=10,
temperature=1.0,
top_k=250,
top_p=0.0
)
# -------------------------
# Job system (in-memory)
# -------------------------
job_queue = queue.Queue()
jobs = {} # job_id -> metadata
class JobStatus:
QUEUED = "queued"
PROCESSING = "processing"
COMPLETED = "completed"
FAILED = "failed"
import signal
class GenerationTimeout(Exception):
pass
def timeout_handler(signum, frame):
raise GenerationTimeout()
MAX_RUNTIME = 600 # 10 minutes (CPU-safe)
def worker():
while True:
job_id = job_queue.get()
job = jobs.get(job_id)
if not job:
job_queue.task_done()
continue
start_time = time.time()
jobs[job_id]["status"] = JobStatus.PROCESSING
try:
wav = model.generate([job["prompt"]])[0]
elapsed = time.time() - start_time
if elapsed > MAX_RUNTIME:
raise TimeoutError("Generation exceeded max runtime")
base_path = os.path.join(OUTPUT_DIR, job_id)
audio_write(
base_path,
wav.cpu(),
model.sample_rate,
strategy="loudness",
loudness_compressor=True
)
final_path = base_path + ".wav"
jobs[job_id].update({
"status": JobStatus.COMPLETED,
"file_path": final_path
})
except Exception as e:
jobs[job_id].update({
"status": JobStatus.FAILED,
"error": str(e)
})
finally:
job_queue.task_done()
# Start worker thread
threading.Thread(target=worker, daemon=True).start()
# -------------------------
# API endpoints
# -------------------------
@app.post("/generate")
async def generate(prompt: str):
job_id = uuid.uuid4().hex
jobs[job_id] = {
"status": JobStatus.QUEUED,
"prompt": prompt,
"created_at": time.time(),
"file_path": None
}
job_queue.put(job_id)
return {
"job_id": job_id,
"status_url": f"/status/{job_id}"
}
@app.get("/status/{job_id}")
async def status(job_id: str):
job = jobs.get(job_id)
if not job:
raise HTTPException(status_code=404, detail="Job not found")
response = {
"job_id": job_id,
"status": job["status"],
"elapsed_seconds": int(time.time() - job["created_at"])
}
if job["status"] == JobStatus.COMPLETED:
response["download_url"] = f"/download/{job_id}"
if job["status"] == JobStatus.FAILED:
response["error"] = job.get("error")
return response
def delete_file(path: str, delay: int = 10):
"""Deletes file after response is sent"""
time.sleep(delay)
if os.path.exists(path):
os.remove(path)
@app.get("/download/{job_id}")
async def download(job_id: str, background_tasks: BackgroundTasks):
job = jobs.get(job_id)
if not job:
raise HTTPException(status_code=404, detail="Job not found")
if job["status"] != JobStatus.COMPLETED:
raise HTTPException(status_code=400, detail="Job not completed")
path = job["file_path"]
if not path or not os.path.exists(path):
raise HTTPException(status_code=404, detail="File not found")
background_tasks.add_task(delete_file, path)
return FileResponse(
path,
media_type="audio/wav",
filename=os.path.basename(path)
)
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