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