如何知道何时使用C ++中的mmsysem库结束播放wav文件 [英] how to know when end playing wav file using mmsysem library in C++

问题描述

大家好，

我正在编写一个使用mmsystem库(mmsystem.h)在C ++中播放wav文件的程序，

我可以播放，停止和暂停，但结束播放wav文件时无法播放.

请帮助他们解决此问题.

非常感谢您！

Hi all,

I am writing a program to play a wav file in C++ using mmsystem library(mmsystem.h),

I can play, stop and pause but I can not when end play wav file.

Please help em to resolve this.

Thanh you very much!

推荐答案

取决于您在waveOutOpen()API中采用的回调机制.
1)如果选择让窗口或线程接收回调信息，则会将以下消息发送到窗口过程函数以指示波形音频输出的进度:MM_WOM_OPEN, MM_WOM_CLOSE和MM_WOM_DONE.
MM_WOM_DONE表示播放结束.

2)如果您选择让函数接收回调信息，则会向函数发送以下消息以指示波形音频输出的进度:WOM_OPEN，WOM_CLOSE和WOM_DONE.
WOM_DONE也表示播放结束.

参考文献:
- WOM_DONE [ MM_WOM_OPEN [ MM_WOM_CLOSE [

Depends on the callback mechanism you have adopted in waveOutOpen() API.

1) If you choose to have a window or thread receive callback information, the following messages are sent to the window procedure function to indicate the progress of waveform-audio output: MM_WOM_OPEN, MM_WOM_CLOSE, and MM_WOM_DONE.
MM_WOM_DONE indicates the end of playback.

2) If you choose to have a function receive callback information, the following messages are sent to the function to indicate the progress of waveform-audio output: WOM_OPEN, WOM_CLOSE, and WOM_DONE.
WOM_DONE also indicates the end of playback.

References:
- WOM_DONE[^]
- MM_WOM_OPEN[^]
- MM_WOM_CLOSE[^]

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