使用方法：wavplay [文件名] [采样率]

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#include <sys/ioctl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/soundcard.h>

#define BUF_SIZE 4096
#define DEVICE_NAME "/dev/dsp"

int audio_fd; //声卡
FILE *file_fd; //文件
int file_len; //文件长度
const char *file_name = "test.wav";
unsigned char audio_buffer[BUF_SIZE];

unsigned char *file_name_creat;
unsigned int audio_rate;

void delay(long x)
{
unsigned long i;
for(i=0; i<x; i++);
}

int main(int argc, char *argv[])
{
int i=0;
printf("This is a wav play program.\n");
printf("Please add a file name and the audio rate! such as \"./oss test.wav 44100\" \n\n\n");
delay(100000);

file_name_creat = argv[1];
sscanf(argv[2],"%d", &audio_rate);

printf("the file name is %s audio rate is %d \n",file_name_creat,audio_rate);
delay(100000);

/*打开音频设备，准备play*/
if ((audio_fd = open(DEVICE_NAME, O_WRONLY)) == -1)
{
   printf("open error\n");
   return -1;
}
/*设置采样格式*/
int format;
format = AFMT_S16_LE;

if (ioctl(audio_fd, SNDCTL_DSP_SETFMT, &format) == -1)
{
   /* fatal error */
   printf("SNDCTL_DSP_SETFMT error\n");
   return -1;  
}

if (format != AFMT_S16_LE)
{
   /* 本设备不支持选择的采样格式. */
   printf("sep4020 oss driver does not support AFMT_S16_LE");
}

/*设置通道数*/
int channels = 2; /* 1=mono, 2=stereo */

if (ioctl(audio_fd, SNDCTL_DSP_CHANNELS, &channels) == -1)
{
   /* Fatal error */
   printf("SNDCTL_DSP_CHANNELS error");
   return -1;
}

if (channels != 2)
{
   /* 本设备不支持立体声模式 ... */
   printf("sep4020 oss driver does ");
}

/*设置采样速率*/
int speed = audio_rate;

if (ioctl(audio_fd, SNDCTL_DSP_SPEED, &speed)==-1)
{
   /* Fatal error */
   printf("SNDCTL_DSP_SPEED error\n");
   return -1;
}
printf("the wav speed is %d\n",speed);

/*打开并计算文件长度*/
file_fd = fopen(file_name_creat, "r");
fseek(file_fd,0,SEEK_END);     //定位到文件末
file_len = ftell(file_fd);     //文件长度

int loops = file_len/4096;

/*重新定位到文件头*/
fclose(file_fd);
file_fd = fopen(file_name_creat, "r");
/*播放wav文件*/
for(i=0;i<loops;i++)
{
   fread(audio_buffer, 4096, 1, file_fd);
   write(audio_fd,audio_buffer,4096);
}
/*关闭设备和文件*/
fclose(file_fd);
close(audio_fd);

return 0;
}

//AUTHOR("aokikyon@gmail.com");
//DESCRIPTION("sep4020 uda1341 sound card test program");

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举例：

/ # ./wavplay xingfu.wav 11025
This is a wav play program.
Please add a file name and the audio rate! such as "./oss test.wav 44100"

the file name is xingfu.wav audio rate is 11025
the wav speed is 11025
/ #

来自：http://hi.baidu.com/aokikyon/blog/item/96e63708cff6a2d962d986cd.html