alsa 应用层 demo---播放wav文件

测试环境
ubuntu14.04 64bit
安装库
$ sudo apt-get install libasound2-dev
编译命令
$ gcc alsaDemo.c -lasound
测试命令
$ ./a.out 1.wav

测试文件
链接：https://pan.baidu.com/s/1yvk8c719bN7aHiIlXC4qgw
提取码：95re

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <alsa/asoundlib.h>
#include <unistd.h>

#define BUF_LEN 1024

typedef struct __WAVE_HEADER1
{
   
   
    unsigned int       uRiffFcc;       // four character code, "RIFF"
    unsigned int       uFileLen;       // file total length, don't care it

    unsigned int       uWaveFcc;       // four character code, "WAVE"

    unsigned int       uFmtFcc;        // four character code, "fmt "
    unsigned int       uFmtDataLen;    // Length of the fmt data (=16)
    unsigned short       uWavEncodeTag;  // WAVE File Encoding Tag
    unsigned short       uChannels;      // Channels: 1 = mono, 2 = stereo
    unsigned int        uSampleRate;    // Samples per second: e.g., 44100
    unsigned int        uBytesPerSec;   // sample rate * block align
    unsigned short       uBlockAlign;    // channels * bits/sample / 8
    unsigned short       uBitsPerSample; // 8 or 16

    unsigned int       uDataFcc;       // four character code "data"
    unsigned int       uSampDataSize;  // Sample data size(n)

}__attribute__((packed))  wave_header_t;


int play_wav(char *partname)
{
   
   
	int i;	int err;
	wave_header_t wav;
	int headwavcntp;
	snd_pcm_t *playback_handle;	
	snd_pcm_hw_params_t *hw_params;
	FILE *fp = NULL;
	snd_pcm_format_t pcm_fmt;
	char buf[BUF_LEN]