Python Multimedia Service Modules: audioop, aifc, sunau, wave, chunk, colorsys, imghdr, sndhdr, ossaudiodev

This article introduces Python's multimedia service modules, covering audio data processing, reading and writing audio files, file type detection, color system conversion, and accessing OSS‑compatible audio devices, with concrete code snippets for each module.

audioop - processing raw audio data

The audioop module provides functions for manipulating raw audio data, such as gain, mixing, clipping, and scaling.

import audioop
# 原始音频数据
data=b'\x00\x10\x20\x30\x40\x50\x60\x70\x80\x90\xa0\xb0\xc0\xd0\xe0\xf0'
# 增加音量
new_data = audioop.mul(data, 2, 2)
print(new_data)

aifc - read/write AIFF and AIFC files

The aifc module allows reading and writing AIFF (Audio Interchange File Format) and AIFF‑C files.

import aifc
# 打开AIFF文件
f = aifc.open('audio.aiff', 'rb')
# 读取音频数据
frames = f.readframes(f.getnframes())
# 关闭文件
f.close()
print(frames)

sunau - read/write Sun AU files

The sunau module handles Sun AU audio files.

import sunau
# 打开AU文件
f = sunau.open('audio.au', 'rb')
# 读取音频数据
frames = f.readframes(f.getnframes())
# 关闭文件
f.close()
print(frames)

wave - read/write WAV format files

The wave module provides functionality for WAV (Waveform Audio File Format) files.

import wave
# 打开WAV文件
f = wave.open('audio.wav', 'rb')
# 读取音频数据
frames = f.readframes(f.getnframes())
# 关闭文件
f.close()
print(frames)

chunk - read IFF chunk data

The chunk module reads chunked data from IFF (Interchange File Format) files, often used together with other modules like wave .

import chunk
# 打开IFF文件
f = open('data.iff', 'rb')
# 创建分块迭代器
it = chunk.Chunk(file=f)
# 遍历分块
for chunk_id, chunk_data in iter(it):
    print(chunk_id, len(chunk_data))
# 关闭文件
f.close()

colorsys - conversion between color systems

The colorsys module offers functions to convert between different color systems.

import colorsys
# RGB颜色
rgb_color = (255, 0, 0)
# 将RGB颜色转换为HLS颜色
hls_color = colorsys.rgb_to_hls(*rgb_color)
print(hls_color)

imghdr - guess image file type

The imghdr module guesses the type of an image file.

import imghdr
# 图像文件
image_file = 'image.jpg'
# 推测图像文件类型
image_type = imghdr.what(image_file)
print(image_type)

sndhdr - guess sound file type

The sndhdr module guesses the type of a sound file.

import sndhdr
# 声音文件
sound_file = 'sound.wav'
# 推测声音文件类型
sound_type = sndhdr.what(sound_file)
print(sound_type)

ossaudiodev - access OSS‑compatible audio devices

The ossaudiodev module provides access to audio devices compatible with the Open Sound System (OSS).

import ossaudiodev
import wave
# 打开WAV文件
f = wave.open('audio.wav', 'rb')
# 打开音频设备
audio_dev = ossaudiodev.open('w')
# 设置音频参数
audio_dev.setfmt(ossaudiodev.AFMT_S16_LE)
audio_dev.channels(f.getnchannels())
audio_dev.speed(f.getframerate())
# 播放音频数据
audio_dev.write(f.readframes(f.getnframes()))
# 关闭音频设备
audio_dev.close()
# 关闭WAV文件
f.close()

By understanding these modules, developers can effectively handle audio data, read various file formats, and interact with audio hardware in Python automation tasks.