C++怎么播放MP3啊！
我第一次用vc++6.0制作小游戏，我只有MP3的素材，怎么播放？
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毫无疑问，c++本身无法播放声音。在windows下可以借助mci(媒体控制接口)播放MP3资源，并且很好的控制播放对象。如果你是C++新人，想写一个控制台下播放mp3的小程序，那么本文完全适合你。
调用mci一般要借助mciSendString函数，使用该函数需要包含头文件mmsystem.h 然而这样一来就会依赖整个mfc框架，导致普通的控制台程序根本无法编译（其实是链接不过去）。所以我在下面的代码中直接从系统的 wimmm.dll 中调用函数，即使用LoadLibraryA("winmm.dll") 。C++新人可能不懂这些，没关系，你只要知道我的代码可以直接贴到你的控制台程序中去就行了。
AudioClip.h文件
<pre name="code" class="cpp">#include<string>
<pre name="code" class="cpp">#include<Windows.h>
typedef int(__stdcall* w32mci)(const char*, char*, int, int);
typedef int(__stdcall * w32mcierror)(int, char*, int);
class Mci
{
private:
HINSTANCE hins;
w32mci wmci;
w32mcierror wmcierror;
public:
Mci();
~Mci();
char buf[256];
bool send(std::string command);//error return false
};
class AudioClip
{
private:
Mci mci;
std::string filename;
std::string alias;
int length_ms;
public:
AudioClip();
~AudioClip();
bool load(const std::string& _filename);
bool play(int start_ms=0, int end_ms=-1);
bool stop();
bool pause();
bool unpause();
int milliseconds();
};
实现文件：
AudioClip.cpp
[cpp] view plain copy
<pre name="code" class="cpp">#include"audio_clip.h"
#include<iostream>
#include<random>
#include<time.h>
Mci::Mci()
{
HINSTANCE hins = LoadLibraryA("winmm.dll");
wmci=(w32mci)GetProcAddress(hins, "mciSendStringA");
wmcierror = (w32mcierror)GetProcAddress(hins, "mciGetErrorStringA");
}
Mci::~Mci()
{
FreeLibrary(hins);
}
bool Mci::send(std::string command)
{
int errcode = wmci(command.c_str(), buf, 254, 0);
if (errcode)
{
wmcierror(errcode, buf, 254);
return false;
}
return true;
}
AudioClip::AudioClip()
{
//do nothing
}
AudioClip::~AudioClip()
{
std::string cmd;
cmd = "close " + alias;
mci.send(cmd);
}
bool AudioClip::load(const std::string& _filename)
{
filename = _filename;
for (unsigned int i = 0; i < filename.length(); i++)
{
if (filename[i] == '/')
filename[i] = '';
}
alias = "mp3_";
srand(time(NULL));
char randstr[6];
_itoa(rand() % 65536, randstr, 10);
alias.append(randstr);
std::string cmd;
cmd = "open " + filename + " alias " + alias;
if (mci.send(cmd) == false)
return false;
cmd = "set " + alias + " time format milliseconds";
if (mci.send(cmd) == false)
return false;
cmd = "status " + alias + " length";
if (mci.send(cmd) == false)
return false;
length_ms = atoi(mci.buf);
return true;
}
bool AudioClip::play(int start_ms , int end_ms)
{
if (end_ms == -1) end_ms = length_ms;
std::string cmd;
char start_str[16], end_str[16];
_itoa(start_ms, start_str,10);
_itoa(end_ms, end_str, 10);
cmd = "play " + alias+" from ";
cmd.append(start_str);
cmd.append(" to ");
cmd.append(end_str);
return mci.send(cmd);
}
bool AudioClip::stop()
{
std::string cmd;
cmd = "stop "+alias;
if (mci.send(cmd) == false)
return false;
cmd = "seek " + alias + " to start";
if (mci.send(cmd) == false)
return false;
return true;
}
bool AudioClip::pause()
{
std::string cmd;
cmd = "pause " + alias;
if (mci.send(cmd) == false)
return false;
return true;
}
bool AudioClip::unpause()
{
std::string cmd;
cmd = "resume " + alias;
if (mci.send(cmd) == false)
return false;
return true;
}
int AudioClip::milliseconds()
{
return length_ms;
}
代码就这么多，在你的代码中这样做就可以播放了