add play_p3 and README

scripts/p3_tools/play_p3.py

@@ -0,0 +1,80 @@
+# 播放p3格式的音频文件
+import opuslib
+import struct
+import numpy as np
+import sounddevice as sd
+import time
+import argparse
+
+def play_p3_file(input_file):
+    """
+    播放p3格式的音频文件
+    p3格式: [1字节类型, 1字节保留, 2字节长度, Opus数据]
+    """
+    # 初始化Opus解码器
+    sample_rate = 16000  # 采样率固定为16000Hz
+    channels = 1  # 单声道
+    decoder = opuslib.Decoder(sample_rate, channels)
+    
+    # 帧大小 (60ms)
+    frame_size = int(sample_rate * 60 / 1000)
+    
+    # 打开音频流
+    stream = sd.OutputStream(
+        samplerate=sample_rate,
+        channels=channels,
+        dtype='int16'
+    )
+    stream.start()
+    
+    try:
+        with open(input_file, 'rb') as f:
+            print(f"正在播放: {input_file}")
+            
+            while True:
+                # 读取头部 (4字节)
+                header = f.read(4)
+                if not header or len(header) < 4:
+                    break
+                
+                # 解析头部
+                packet_type, reserved, data_len = struct.unpack('>BBH', header)
+                
+                # 读取Opus数据
+                opus_data = f.read(data_len)
+                if not opus_data or len(opus_data) < data_len:
+                    break
+                
+                # 解码Opus数据
+                pcm_data = decoder.decode(opus_data, frame_size)
+                
+                # 将字节转换为numpy数组
+                audio_array = np.frombuffer(pcm_data, dtype=np.int16)
+                
+                # 播放音频
+                stream.write(audio_array)
+                
+                # 等待一帧的时间
+                time.sleep(60 / 1000)  # 60ms
+            
+            # 播放结束后添加0.5秒静音，避免破音
+            silence = np.zeros(int(sample_rate / 2), dtype=np.int16)
+            stream.write(silence)
+            time.sleep(0.5)  # 等待1秒
+                
+    except KeyboardInterrupt:
+        print("\n播放已停止")
+    finally:
+        stream.stop()
+        stream.close()
+        print("播放完成")
+
+def main():
+    parser = argparse.ArgumentParser(description='播放p3格式的音频文件')
+    parser.add_argument('input_file', help='输入的p3文件路径')
+    args = parser.parse_args()
+    
+    play_p3_file(args.input_file)
+
+if __name__ == "__main__":
+    main()