音频wave API

来源：互联网发布：社交网络马克为什么渣编辑：程序博客网时间：2024/04/28 20:22

停止音频输入

The waveInStop function stops waveform-audio input.

MMRESULT waveInStop(   HWAVEIN hwi   //Handle to the waveform-audio input device;);

返回值：成功 MMSYSERR_NOERROR

Return code Description

MMSYSERR_INVALHANDLE

Specified device handle is invalid.

MMSYSERR_NODRIVER

No device driver is present.

MMSYSERR_NOMEM

Unable to allocate or lock memory.

重置输入音频(还原成之前的样子)

MMRESULT waveInReset(   HWAVEIN hwi);

返回值和上面一样

The waveInPrepareHeader function prepares a buffer for waveform-audio input.

准备一个缓冲区来存储输入的音频

MMRESULT waveInPrepareHeader(   HWAVEIN   hwi,   LPWAVEHDR pwh,   UINT      cbwh);

清理waveInPrepareHeader，这个功能必须在调用设备驱动填充完缓冲区并且返回应用程序后调用，也就是在调用前必须释放缓冲区

MMRESULT waveInUnprepareHeader(   HWAVEIN   hwi,   LPWAVEHDR pwh,   UINT      cbwh);

waveInClose(HANDLE) 释放音频句柄

打开记录给定的音频输入

MMRESULT waveInOpen(   LPHWAVEIN       phwi,   UINT            uDeviceID,   LPCWAVEFORMATEX pwfx,   DWORD_PTR       dwCallback,   DWORD_PTR       dwCallbackInstance,   DWORD           fdwOpen);

waveInAddBuffer

同理还用输出音频的API，类似

waveOutReset()

waveOutUnprepareHeader()

waveOutClose()

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