Python调用系统底层API播放wav文件的方法_Python

本文实例讲述了Python调用系统底层API播放wav文件的方法。分享给大家供大家参考，具体如下：

这里未使用其他库，只是使用 pywin32 调用系统底层 API 播放 wav 文件。

具体代码如下：

									# Our raison d'etre - playing sounds

									import pywintypes

									import struct

									import win32event

									import win32com.directsound.directsound as ds

									import os

									WAV_HEADER_SIZE = struct.calcsize('<4sl4s4slhhllhh4sl')

									def wav_header_unpack(data):

									  '''解包wav文件头信息'''

									  (riff, riffsize, wave, fmt, fmtsize, format, nchannels, samplespersecond, \

									  datarate, blockalign, bitspersample, data, datalength) = struct.unpack('<4sl4s4slhhllhh4sl', data)

									  if riff != b'RIFF' or fmtsize != 16 or fmt != b'fmt ' or data != b'data':

									    raise ValueError

									  wfx = pywintypes.WAVEFORMATEX()

									  wfx.wFormatTag = format

									  wfx.nChannels = nchannels

									  wfx.nSamplesPerSec = samplespersecond

									  wfx.nAvgBytesPerSec = datarate

									  wfx.nBlockAlign = blockalign

									  wfx.wBitsPerSample = bitspersample

									  return wfx, datalength

									# 播放wav文件，直到结束

									sound_file = "音效-足球观众的欢呼声.wav"

									fname = os.path.join(os.path.dirname(__file__), sound_file)

									f = open(fname, 'rb')

									# 读取/解包wav文件头

									hdr = f.read(WAV_HEADER_SIZE)

									wfx, size = wav_header_unpack(hdr)

									d = ds.DirectSoundCreate(None, None)

									d.SetCooperativeLevel(None, ds.DSSCL_PRIORITY)

									sdesc = ds.DSBUFFERDESC()

									sdesc.dwFlags = ds.DSBCAPS_STICKYFOCUS | ds.DSBCAPS_CTRLPOSITIONNOTIFY

									sdesc.dwBufferBytes = size

									sdesc.lpwfxFormat = wfx

									buffer = d.CreateSoundBuffer(sdesc, None)

									event = win32event.CreateEvent(None, 0, 0, None)

									notify = buffer.QueryInterface(ds.IID_IDirectSoundNotify)

									notify.SetNotificationPositions((ds.DSBPN_OFFSETSTOP, event))

									buffer.Update(0, f.read(size))

									buffer.Play(0)

									win32event.WaitForSingleObject(event, -1)

希望本文所述对大家Python程序设计有所帮助。

原文链接：http://www.cnblogs.com/hhh5460/p/5856950.html

Python调用系统底层API播放wav文件的方法

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