Python调用Windows API函数编写录音机和音乐播放器功

1. Introduction

Python is a versatile programming language that allows users to call Windows API functions to perform various tasks. In this article, we will explore how to use Python to create a simple sound recorder and music player using Windows API functions. We will cover the necessary steps to set up the environment, record and playback audio, and discuss the key aspects of the code implementation.

2. Setting up the Environment

2.1 Installing Dependencies

In order to access the Windows API functions for audio recording and playback, we need to install the pywin32 library, which provides a Python interface to the Windows API.

pip install pywin32

2.2 Importing Required Modules

We need to import the necessary modules in our Python script to access the Windows API functions and perform the required operations:

import win32api

import win32gui
import win32con

3. Creating a Sound Recorder

3.1 Recording Audio

To create a sound recorder, we need to use the waveInOpen and waveInStart functions from the Windows API. The waveInOpen function is used to open an audio input device, and the waveInStart function starts recording audio from the specified input device.

def sound_recorder():

    # Open audio input device
    device = win32api.waveInOpen(None, win32con.WAVE_FORMAT_PCM, 1, 44100, 16, win32con.WAVE_FORMAT_DIRECT)
    
    # Start recording audio
    win32api.waveInStart(device)

3.2 Stopping Recording

To stop the recording, we can use the waveInStop function from the Windows API. This function stops the audio input device from recording.

def stop_recording(device):

    # Stop recording audio
    win32api.waveInStop(device)

4. Creating a Music Player

4.1 Playing Audio

To create a music player, we need to use the mciSendString function from the Windows API. This function allows us to send commands to the Windows Multimedia API to play audio files.

def music_player(filename):

    # Open audio file
    win32api.mciSendString(f'open "{filename}" alias music', None, 0, None)
    
    # Play audio
    win32api.mciSendString('play music', None, 0, None)

4.2 Stopping Playback

To stop the playback, we can use the mciSendString function with the "stop" command. This command stops the audio file from playing.

def stop_playback():

    # Stop playback
    win32api.mciSendString('stop music', None, 0, None)

5. Conclusion

In this article, we have explored how to use Python to create a simple sound recorder and music player using Windows API functions. We discussed the necessary steps to set up the environment, record and playback audio, and provided examples of the code implementation. By leveraging the Windows API functions, we can harness the power of Python to perform various audio-related tasks on the Windows platform.