c语言音频

‘壹’ 如何用c语言编写程序将多个wav文件拼接成一个音频wav文件并播放

这不是三言两语的事情，合作wav文件操作并不简单。要研究好wav文件结构，读取文件头，再进行分析和操作。
有两种办法：

1.连续播放，例如：

#include<stdio.h>
#include<windows.h>
#include<mmsystem.h>
#pragmacomment(lib,"winmm.lib")
intmain(){
PlaySound("C:\Users\wang\test1.wav",NULL,SND_FILENAME);
PlaySound("C:\Users\wang\test2.wav",NULL,SND_FILENAME);
PlaySound("C:\Users\wang\test3.wav",NULL,SND_FILENAME);
return0;
}

2.系统自带的“windows movie maker”。运行windows movie maker，然后选择“导入音频或音乐”之后把你需要的文件添加进来。然后按照你自己需要排列的顺序把这些文件依次拖到下方的时间线上。然后点左上方的“文件”选项，最后保存电影文件即可。

‘贰’ C语言编写程序将多个wav文件拼接成一个音频wav文件并播放

#include<stdio.h>
#include<string.h>

#defineRIFF_SIGN_ID0x46464952ul
#defineWAVE_SIGN_ID0x45564157ul
#defineFMT__SIGN_ID0x20746D66ul
#defineFACT_SIGN_ID0x74636166ul
#defineDATA_SIGN_ID0x61746164ul

#ifndefDWORD
typedefunsignedlongDWORD;
#endif

#ifndefWORD
typedefunsignedshortWORD;
#endif

#ifndefBYTE
typedefunsignedcharBYTE;
#endif
structRIFF_HEADER
{
	DWORDRiffID;//资源交换文件标志0x46464952'R','I','F','F'
	DWORDRiffSize;//从下个地址开始到文件尾的总字节数
	DWORDRiffFormat;//WAV文件标志0x45564157'W','A','V','E'
};

structWAVE_FORMAT
{
	WORDFormatTag;//格式种类(值为1时，表示数据为线性PCM编码)
	WORDChannels;//通道数，单声道为1，双声道为2
	DWORDSamplesPerSec;//采样频率
	DWORDAvgBytesPerSec;//每秒所需字节数
	WORDBlockAlign;//数据块对齐单位（每个采样需要的字节数）
	WORDBitsPerSample;//每个采样需要的bit数
	WORDotherInfo;//附加信息（可选，通过Size来判断有无）
};

structFMT_BLOCK
{
	DWORDFmtID;//波形格式标志0x20746D66'f','m','t',''
	DWORDFmtSize;//波形格式部分长度（一般为00000010H）
	WAVE_FORMATwavFormat;//波形数据格式
};

structUNKNOW_BLOCK
{
	DWORDID;//未知块
	DWORDSize;//未知块长度
};

structFACT_BLOCK
{
	DWORDFactID;//可选部分标识0x74636166'f','a','c','t'
	DWORDFactSize;//可选部分长度
	BYTEData[1];//可选部分数据
};

structDATA_BLOCK
{
	DWORDDataID;//数据标志符0x61746164,'d','a','t','a'
	DWORDDataSize;//DATA总数据长度字节
	BYTEData[1];//数据
};


BYTE*openWaveFile(constchar*name);
BYTE*getWaveData(BYTE*wav,int*dLen);
voidprintWaveFormat(BYTE*wav);
intsaveWaveFile(constchar*name,BYTE*wav);
BYTE*catWave(BYTE*&wav1,BYTE*&wav2);
size_tgetTotalLen(BYTE*wav);

intmain(intargc,char*argv[])
{
	intdLen;
	BYTE*data1=openWaveFile("1.wav");
	printWaveFormat(data1);
	BYTE*data2=openWaveFile("2.wav");
	printWaveFormat(data2);
	data1=catWave(data1,data2);
	printWaveFormat(data1);
	saveWaveFile("3.wav",data1);
	return0;
}

BYTE*openWaveFile(constchar*name)
{
	size_treadByte;
	FILE*fp=fopen(name,"rb");
	if(fp==NULL)returnNULL;

	RIFF_HEADERfh;
	if(fread(&fh,sizeof(fh),1,fp)!=1)
	{
		fclose(fp);
		printf("RiffHeader文件长度错误
");
		returnNULL;
	}
	if(fh.RiffFormat!=WAVE_SIGN_ID||fh.RiffID!=RIFF_SIGN_ID)
	{
		fclose(fp);
		printf("文件标识符错误ID:%08XFormat:%08X
",fh.RiffID,fh.RiffFormat);
		returnNULL;
	}
	BYTE*r=newBYTE[fh.RiffSize+10],*pr;
	if(r==NULL)
	{
		fclose(fp);
		printf("内存申请错误
");
		returnNULL;
	}
	readByte=fread(r,1,fh.RiffSize-4,fp);
	if(readByte!=fh.RiffSize-4)
	{
		delete[]r;
		printf("wave文件长度错误%d%d
",readByte,fh.RiffSize);
		returnNULL;
	}
	fclose(fp);

	FMT_BLOCK*fb=(FMT_BLOCK*)r;
	if(fb->FmtID!=FMT__SIGN_ID)
	{
		printf("格式标识符错误或格式大小错误ID:%08X
",fb->FmtID);
		delete[]r;
		returnNULL;
	}
	if(fb->wavFormat.FormatTag!=1)
	{
		delete[]r;
		printf("不支持的格式Format:%d
",fb->wavFormat.FormatTag);
		returnNULL;
	}

	pr=r+8+fb->FmtSize;
	while(1)
	{
		UNKNOW_BLOCK*ub=(UNKNOW_BLOCK*)pr;
		if(ub->ID==FACT_SIGN_ID)
		{
			printf("Fact标签length:%d
",ub->Size);
			pr+=8+ub->Size;
		}
		elsebreak;
	}
	DATA_BLOCK*db=(DATA_BLOCK*)pr;
	if(db->DataID!=DATA_SIGN_ID)
	{
		delete[]r;
		printf("数据错误
");
		returnNULL;
	}
	returnr;
}

BYTE*getWaveData(BYTE*wav,int*dLen)
{
	UNKNOW_BLOCK*ub=(UNKNOW_BLOCK*)wav;
	while(ub->ID!=DATA_SIGN_ID)
	{
		switch(ub->ID)
		{
		caseDATA_SIGN_ID:
			break;
		caseFMT__SIGN_ID:
		caseFACT_SIGN_ID:
			ub=(UNKNOW_BLOCK*)(((BYTE*)ub)+ub->Size+8);
			break;
		default:
			printf("错误标签%08X
",ub->ID);
			returnNULL;
		}
	}
	DATA_BLOCK*db=(DATA_BLOCK*)ub;
	*dLen=db->DataSize;
	returndb->Data;
}

size_tgetTotalLen(BYTE*wav)
{
	size_tr=0;
	UNKNOW_BLOCK*ub=(UNKNOW_BLOCK*)wav;
	while(1)
	{
		switch(ub->ID)
		{
		caseDATA_SIGN_ID:
			r+=ub->Size+8;
			returnr;
		caseFMT__SIGN_ID:
		caseFACT_SIGN_ID:
			r+=ub->Size+8;
			ub=(UNKNOW_BLOCK*)(((BYTE*)ub)+ub->Size+8);
			break;
		default:
			printf("错误标签%08X
",ub->ID);
			returnNULL;
		}
	}
	return-1;
}
		voidprintWaveFormat(BYTE*wav)
{
	intlen;
	getWaveData(wav,&len);
	FMT_BLOCK*fb=(FMT_BLOCK*)wav;
	printf("Wave格式：PCM
");
	printf("通道数量：%d
",fb->wavFormat.Channels);
	printf("采样频率：%dHz
",fb->wavFormat.SamplesPerSec);
	printf("每秒所需字节数：%d字节
",fb->wavFormat.AvgBytesPerSec);
	printf("数据块对齐单位：%d字节
",fb->wavFormat.BlockAlign);
	printf("每个采样需要的bit数：%dbit
",fb->wavFormat.BitsPerSample);
	printf("长度：%.2f秒
",(double)len/fb->wavFormat.AvgBytesPerSec);
}

BYTE*catWave(BYTE*&wav1,BYTE*&wav2)
{
	FMT_BLOCK*fb1=(FMT_BLOCK*)wav2;
	constFMT_BLOCK*fb2=(constFMT_BLOCK*)wav2;
	if(
		fb1->wavFormat.AvgBytesPerSec==fb2->wavFormat.AvgBytesPerSec&&
		fb1->wavFormat.BitsPerSample==fb2->wavFormat.BitsPerSample&&
		fb1->wavFormat.BlockAlign==fb2->wavFormat.BlockAlign&&
		fb1->wavFormat.Channels==fb2->wavFormat.Channels&&
		fb1->wavFormat.FormatTag==fb2->wavFormat.FormatTag&&
		fb1->wavFormat.SamplesPerSec==fb2->wavFormat.SamplesPerSec)
	{
		intlen1=getTotalLen(wav1),len2;
		BYTE*Data2=getWaveData(wav2,&len2);
		BYTE*nD=newBYTE[len1+len2+10];
		if(nD==NULL)returnNULL;
		memcpy(nD,wav1,len1);
		delete[]wav1;
		wav1=nD;
		BYTE*Data1=getWaveData(wav1,&len1);
		DATA_BLOCK*db1=(DATA_BLOCK*)(Data1-8);
		db1->DataSize+=len2;
		memcpy(Data1+len1,Data2,len2);
		returnwav1;
	}
	returnNULL;
}

intsaveWaveFile(constchar*name,BYTE*wav)
{
	FILE*fp=fopen(name,"wb");
	if(fp==0)return0;
	intlen=getTotalLen(wav);
	RIFF_HEADERrh;
	rh.RiffFormat=WAVE_SIGN_ID;
	rh.RiffID=RIFF_SIGN_ID;
	rh.RiffSize=len+4;
	fwrite(&rh,sizeof(rh),1,fp);
	fwrite(wav,1,len,fp);
	fclose(fp);
	return1;
}

‘叁’ C语言播放音频文件的问题....

可以使用PlaySound()函数播放wav声音，该函数原型位于windows.h中,
函数原型为：
BOOL PlaySound(LPCSTR pszSound, HMODULE hmod,DWORD fdwSound);

参数pszSound是指定了要播放声音的字符串，该参数可以是WAVE文件的名字，或是WAV资源的名字，或是内存中声音数据的指针，或是在系统注册表WIN.INI中定义的系统事件声音。如果该参数为NULL则停止正在播放的声音。

参数hmod是应用程序的实例句柄，当播放WAV资源时要用到该参数，否则它必须为NULL。

参数fdwSound是标志的组合，各种可选的标志及意义如下所示。若成功则函数返回TRUE，否则返回FALSE。

播放标志以及含义：

SND_APPLICATION
用应用程序指定的关联来播放声音。

SND_ALIAS
pszSound参数指定了注册表或WIN.INI中的系统事件的别名。

SND_ALIAS_ID
pszSound参数指定了预定义的声音标识符。

SND_ASYNC
用异步方式播放声音，PlaySound函数在开始播放后立即返回。

SND_FILENAME
pszSound参数指定了WAVE文件名。

SND_LOOP
重复播放声音，必须与SND_ASYNC标志一块使用。

SND_MEMORY
播放载入到内存中的声音，此时pszSound是指向声音数据的指针。

SND_NODEFAULT
不播放缺省声音，若无此标志，则PlaySound在没找到声音时会播放缺省声音。

SND_NOSTOP
PlaySound不打断原来的声音播出并立即返回FALSE。

SND_NOWAIT
如果驱动程序正忙则函数就不播放声音并立即返回。

SND_PURGE
停止所有与调用任务有关的声音。若参数pszSound为NULL，就停止所有的声音，否则，停止pszSound指定的声音。

SND_RESOURCE
pszSound参数是WAVE资源的标识符，这时要用到hmod参数。

SND_SYNC
同步播放声音，在播放完后PlaySound函数才返回。

************************************************************

例如我想播放在C:\WINDOWS\Media目录中的 Windows XP 启动.wav 文件
程序如下：

#include <windows.h>
#include <stdlib.h>
int main(int argc, char* argv[])
{
PlaySound("C:\\WINDOWS\\Media\\Windows XP 启动.wav", NULL, SND_FILENAME | SND_ASYNC);
system("pause");
return 0;
}

‘肆’ C语言如何播放mp3格式音乐

windows现有的API似乎只支持播放.wav格式的音频，mp3格式恐怕你得再去网上找找开源代码

//播放音频"1.wav"
#include<stdio.h>
#include<windows.h>
#pragmacomment(lib,"winmm.lib")

intmain()
{
PlaySound("1.wav",NULL,SND_FILENAME|SND_ASYNC|SND_LOOP);
getchar();
return0;
}

‘伍’ 怎样用标准C语言播放音乐

用C语言播放音乐，一般需要额外的库或者调用系统的API函数。

以Windows为例，可以通过PlaySound函数播放wav格式的音乐。示例如下：

#include<stdio.h>
#include<windows.h>
#include<mmsystem.h>
#pragmacomment(lib,"WINMM.LIB")
intmain()
{
PlaySound(TEXT("1.wav"),0,SND_FILENAME);//1.wav是要播放的音乐文件
return0;
}

如果想播放mp3音乐可以使用如下代码。

注意：生成程序后，请在cmd中执行此程序，不要在vc/vs的IDE中运行。

#include<windows.h>
#include<mmsystem.h>
#include<stdio.h>
#pragmacomment(lib,"Winmm.lib")
intmain(intargc,char*argv[])
{
//绝对地址形式
TCHARfileName[]="ganlusi.mp3";
TCHARshortName[MAX_PATH];
GetShortPathName(fileName,shortName,sizeof(shortName)/sizeof(TCHAR));
TCHARcmd[MAX_PATH+10];
wsprintf(cmd,"play%s",shortName);
mciSendString(cmd,NULL,0,NULL);
Sleep(5*60*1000);//这里是防止一播放就结束做的延迟
return0;
}

‘陆’ 求一份c语言的RTP音频传输源码

1.项目前期工作（配置好环境）
2.发送端文件编写（见下面的send.cpp）
3.接收端文件编写（见下面的receive.cpp）
4.编译文件
（1）发送端
g++-osendsend.cpp-I/usr/local/include/jrtplib3/-ljrtp
（2）接收端
g++-oreceivereceive.cpp-I/usr/local/include/jrtplib3/-ljrtp
附录：
（1）send.cpp
[cpp]
#include"rtpsession.h"
#include"rtppacket.h"
#include"rtpudpv4transmitter.h"
#include"rtpipv4address.h"
#include"rtpsessionparams.h"
#include"rtperrors.h"
#include"rtpmemorymanager.h"
#ifndefWIN32
#include<netinet/in.h>
#include<arpa/inet.h>
#else
#include<winsock2.h>
#endif//WIN32
#include<stdlib.h>
#include<stdio.h>
#include<iostream>
#include<string>

//
//.Ifso,itdisplaysanerror
//messageandexists.
//

voidcheckerror(intrtperr)
{
if(rtperr<0)
{
std::cout<<"ERROR:"<<RTPGetErrorString(rtperr)<<std::endl;
exit(-1);
}
}

//
//Themainroutine
//

#ifdefRTP_SUPPORT_THREAD

classMyMemoryManager:publicRTPMemoryManager
{
public:
MyMemoryManager()
{
mutex.Init();
alloccount=0;
freecount=0;
}
~MyMemoryManager()
{
std::cout<<"alloc:"<<alloccount<<"free:"<<freecount<<std::endl;
}
void*AllocateBuffer(size_tnumbytes,intmemtype)
{
mutex.Lock();
void*buf=malloc(numbytes);
std::cout<<"Allocated"<<numbytes<<"bytesatlocation"<<buf<<"(memtype="<<memtype<<")"<<std::endl;
alloccount++;
mutex.Unlock();
returnbuf;
}

voidFreeBuffer(void*p)
{
mutex.Lock();
std::cout<<"Freeingblock"<<p<<std::endl;
freecount++;
free(p);
mutex.Unlock();
}
private:
intalloccount,freecount;
JMutexmutex;
};

#else

classMyMemoryManager:publicRTPMemoryManager
{
public:
MyMemoryManager()
{
alloccount=0;
freecount=0;
}
~MyMemoryManager()
{
std::cout<<"alloc:"<<alloccount<<"free:"<<freecount<<std::endl;
}
void*AllocateBuffer(size_tnumbytes,intmemtype)
{
void*buf=malloc(numbytes);
std::cout<<"Allocated"<<numbytes<<"bytesatlocation"<<buf<<"(memtype="<<memtype<<")"<<std::endl;
alloccount++;
returnbuf;
}

voidFreeBuffer(void*p)
{
std::cout<<"Freeingblock"<<p<<std::endl;
freecount++;
free(p);
}
private:
intalloccount,freecount;
};

#endif//RTP_SUPPORT_THREAD

intmain(void)
{
#ifdefWIN32
WSADATAdat;
WSAStartup(MAKEWORD(2,2),&dat);
#endif//WIN32

MyMemoryManagermgr;
RTPSessionsess(&mgr);
uint16_tportbase,destport;
uint32_tdestip;
std::stringipstr;
intstatus,i,num;

//First,we'

std::cout<<"Enterlocalportbase:"<<std::endl;
std::cin>>portbase;
std::cout<<std::endl;

std::cout<<"EnterthedestinationIPaddress"<<std::endl;
std::cin>>ipstr;
destip=inet_addr(ipstr.c_str());
if(destip==INADDR_NONE)
{
std::cerr<<"BadIPaddressspecified"<<std::endl;
return-1;
}

//Theinet_,but
//,soweuseacallto
//ntohl
destip=ntohl(destip);

std::cout<<"Enterthedestinationport"<<std::endl;
std::cin>>destport;

std::cout<<std::endl;
std::cout<<":"<<std::endl;
std::cin>>num;

//Now,we'llcreateaRTPsession,setthedestination,sendsome
//packetsandpollforincomingdata.

;
RTPSessionParamssessparams;

//IMPORTANT:,otherwise
//
//Inthiscase,we',sowe'll
//putthetimestampunitto(1.0/10.0)
sessparams.SetOwnTimestampUnit(1.0/10.0);

sessparams.SetAcceptOwnPackets(true);
transparams.SetPortbase(portbase);
status=sess.Create(sessparams,&transparams);
checkerror(status);

RTPIPv4Addressaddr(destip,destport);

status=sess.AddDestination(addr);
checkerror(status);

for(i=1;i<=num;i++)
{
printf("
Sendingpacket%d/%d
",i,num);

//sendthepacket
status=sess.SendPacket((void*)"1234567890",10,0,false,10);
checkerror(status);

sess.BeginDataAccess();

//checkincomingpackets
if(sess.GotoFirstSourceWithData())
{
do
{
RTPPacket*pack;

while((pack=sess.GetNextPacket())!=NULL)
{
//Youcanexaminethedatahere
printf("Gotpacket!
");

//wedon'tlongerneedthepacket,so
//we'lldeleteit
sess.DeletePacket(pack);
}
}while(sess.GotoNextSourceWithData());
}

sess.EndDataAccess();

#ifndefRTP_SUPPORT_THREAD
status=sess.Poll();
checkerror(status);
#endif//RTP_SUPPORT_THREAD

RTPTime::Wait(RTPTime(1,0));
}

sess.BYEDestroy(RTPTime(10,0),0,0);

#ifdefWIN32
WSACleanup();
#endif//WIN32
return0;
}
(2)receive.cpp
[cpp]viewplain
#include"rtpsession.h"
#include"rtppacket.h"
#include"rtpudpv4transmitter.h"
#include"rtpipv4address.h"
#include"rtpsessionparams.h"
#include"rtperrors.h"
#ifndefWIN32
#include<netinet/in.h>
#include<arpa/inet.h>
#else
#include<winsock2.h>
#endif//WIN32
#include"rtpsourcedata.h"
#include<stdlib.h>
#include<stdio.h>
#include<iostream>
#include<string>

//
//.Ifso,itdisplaysanerror
//messageandexists.
//

voidcheckerror(intrtperr)
{
if(rtperr<0)
{
std::cout<<"ERROR:"<<RTPGetErrorString(rtperr)<<std::endl;
exit(-1);
}
}

//
//Thenewclassroutine
//

classMyRTPSession:publicRTPSession
{
protected:
voidOnNewSource(RTPSourceData*dat)
{
if(dat->IsOwnSSRC())
return;

uint32_tip;
uint16_tport;

if(dat->GetRTPDataAddress()!=0)
{
constRTPIPv4Address*addr=(constRTPIPv4Address*)(dat->GetRTPDataAddress());
ip=addr->GetIP();
port=addr->GetPort();
}
elseif(dat->GetRTCPDataAddress()!=0)
{
constRTPIPv4Address*addr=(constRTPIPv4Address*)(dat->GetRTCPDataAddress());
ip=addr->GetIP();
port=addr->GetPort()-1;
}
else
return;

RTPIPv4Addressdest(ip,port);
AddDestination(dest);

structin_addrinaddr;
inaddr.s_addr=htonl(ip);
std::cout<<"Addingdestination"<<std::string(inet_ntoa(inaddr))<<":"<<port<<std::endl;
}

voidOnBYEPacket(RTPSourceData*dat)
{
if(dat->IsOwnSSRC())
return;

uint32_tip;
uint16_tport;

if(dat->GetRTPDataAddress()!=0)
{
constRTPIPv4Address*addr=(constRTPIPv4Address*)(dat->GetRTPDataAddress());
ip=addr->GetIP();
port=addr->GetPort();
}
elseif(dat->GetRTCPDataAddress()!=0)
{
constRTPIPv4Address*addr=(constRTPIPv4Address*)(dat->GetRTCPDataAddress());
ip=addr->GetIP();
port=addr->GetPort()-1;
}
else
return;

RTPIPv4Addressdest(ip,port);
DeleteDestination(dest);

structin_addrinaddr;
inaddr.s_addr=htonl(ip);
std::cout<<"Deletingdestination"<<std::string(inet_ntoa(inaddr))<<":"<<port<<std::endl;
}

voidOnRemoveSource(RTPSourceData*dat)
{
if(dat->IsOwnSSRC())
return;
if(dat->ReceivedBYE())
return;

uint32_tip;
uint16_tport;

if(dat->GetRTPDataAddress()!=0)
{
constRTPIPv4Address*addr=(constRTPIPv4Address*)(dat->GetRTPDataAddress());
ip=addr->GetIP();
port=addr->GetPort();
}
elseif(dat->GetRTCPDataAddress()!=0)
{
constRTPIPv4Address*addr=(constRTPIPv4Address*)(dat->GetRTCPDataAddress());
ip=addr->GetIP();
port=addr->GetPort()-1;
}
else
return;

RTPIPv4Addressdest(ip,port);
DeleteDestination(dest);

structin_addrinaddr;
inaddr.s_addr=htonl(ip);
std::cout<<"Deletingdestination"<<std::string(inet_ntoa(inaddr))<<":"<<port<<std::endl;
}
};

//
//Themainroutine
//

intmain(void)
{
#ifdefWIN32
WSADATAdat;
WSAStartup(MAKEWORD(2,2),&dat);
#endif//WIN32

MyRTPSessionsess;
uint16_tportbase;
std::stringipstr;
intstatus,i,num;

//First,we'

std::cout<<"Enterlocalportbase:"<<std::endl;
std::cin>>portbase;
std::cout<<std::endl;

std::cout<<std::endl;
std::cout<<"Numberofsecondsyouwishtowait:"<<std::endl;
std::cin>>num;

//Now,we'llcreateaRTPsession,setthedestination
//andpollforincomingdata.

;
RTPSessionParamssessparams;

//IMPORTANT:,otherwise
//
//Inthiscase,we'.
sessparams.SetOwnTimestampUnit(1.0/8000.0);

sessparams.SetAcceptOwnPackets(true);
transparams.SetPortbase(portbase);
status=sess.Create(sessparams,&transparams);
checkerror(status);

for(i=1;i<=num;i++)
{
sess.BeginDataAccess();

//checkincomingpackets
if(sess.GotoFirstSourceWithData())
{
do
{
RTPPacket*pack;

while((pack=sess.GetNextPacket())!=NULL)
{
//Youcanexaminethedatahere
printf("Gotpacket!
");

//wedon'tlongerneedthepacket,so
//we'lldeleteit
sess.DeletePacket(pack);
}
}while(sess.GotoNextSourceWithData());
}

sess.EndDataAccess();

#ifndefRTP_SUPPORT_THREAD
status=sess.Poll();
checkerror(status);
#endif//RTP_SUPPORT_THREAD

RTPTime::Wait(RTPTime(1,0));
}

sess.BYEDestroy(RTPTime(10,0),0,0);

#ifdefWIN32
WSACleanup();
#endif//WIN32
return0;
}