Create /vc/audio.py

lib/vc/audio.py

@@ -0,0 +1,73 @@
+import os
+import traceback
+
+import librosa
+import numpy as np
+import av
+from io import BytesIO
+
+
+def wav2(i, o, format):
+    inp = av.open(i, "rb")
+    if format == "m4a":
+        format = "mp4"
+    out = av.open(o, "wb", format=format)
+    if format == "ogg":
+        format = "libvorbis"
+    if format == "mp4":
+        format = "aac"
+
+    ostream = out.add_stream(format)
+
+    for frame in inp.decode(audio=0):
+        for p in ostream.encode(frame):
+            out.mux(p)
+
+    for p in ostream.encode(None):
+        out.mux(p)
+
+    out.close()
+    inp.close()
+
+
+def audio2(i, o, format, sr):
+    inp = av.open(i, "rb")
+    out = av.open(o, "wb", format=format)
+    if format == "ogg":
+        format = "libvorbis"
+    if format == "f32le":
+        format = "pcm_f32le"
+
+    ostream = out.add_stream(format, channels=1)
+    ostream.sample_rate = sr
+
+    for frame in inp.decode(audio=0):
+        for p in ostream.encode(frame):
+            out.mux(p)
+
+    out.close()
+    inp.close()
+
+
+def load_audio(file, sr):
+    file = (
+        file.strip(" ").strip('"').strip("\n").strip('"').strip(" ")
+    )  # 防止小白拷路径头尾带了空格和"和回车
+    if os.path.exists(file) == False:
+        raise RuntimeError(
+            "You input a wrong audio path that does not exists, please fix it!"
+        )
+    try:
+        with open(file, "rb") as f:
+            with BytesIO() as out:
+                audio2(f, out, "f32le", sr)
+                return np.frombuffer(out.getvalue(), np.float32).flatten()
+
+    except AttributeError:
+        audio = file[1] / 32768.0
+        if len(audio.shape) == 2:
+            audio = np.mean(audio, -1)
+        return librosa.resample(audio, orig_sr=file[0], target_sr=16000)
+
+    except:
+        raise RuntimeError(traceback.format_exc())