audio_test.c

IIS 音频驱动实验 基于TEB-44B0实验平台 包括音频驱动程序与测试程序

// Audio test : Using CS4334 to play wav file
// Vencent 
// 2005.10.11

#include <stdio.h>
#include <stdlib.h> 
//#include <sys/types.h> 
//#include <sys/stat.h> 
#include <fcntl.h>
//#include <linux/sound.h> 
#include <linux/soundcard.h>

#include "s3c44b0x.h"
#include "wav.h"


#define AUDIODEVE	"/dev/audio"
#define WAVEFILE 	"/bin/test.wav"
//#define AUDIOBUFLEN	200*1024                  // 200K byte buffer
//unsigned char buf[AUDIOBUFLEN];
//#define WAVE_FORMAT_PCM	0x0001
//#define IIS_FIFOREADY	!(((inl(S3C44B0X_IISCON))>>7)&1)
int verbose = 1;
int raw = 0;
struct wavefile wav;

/*
 *	Endian re-arranger :-)
 */
#define	SWAPLONG(a)	((((a) & 0xff000000) >> 24) | \
			(((a) & 0x00ff0000) >> 8) | \
			(((a) & 0x0000ff00) << 8) | \
			(((a) & 0x000000ff) << 24))

#define	SWAPSHORT(a)	(((a) >> 8) | ((a) << 8))

int main(void)
{
 	int fd_dev, fd_file;
	int i, j, k, n ;
	int freq, chans, bitspersample;
	int ret;
	char c;
	unsigned long data_size;
	
        /* Default to not set for now */
 	freq = 0;
	chans = 0;
	bitspersample = 0;
	
	fd_dev = open(AUDIODEVE, O_WRONLY);           // open the audio device
 	if(fd_dev < 0)
 	{
  		printf("Failed to open the audio device!\n");
  	 	exit(1);
 	}
 	printf("The audio device is open successfully!\n");
 
	fd_file = open(WAVEFILE, O_RDONLY);             // open the test wave file
 	if(fd_file < 0)
	{
		printf("Failed to open the test wave file!\n");
		exit(2);
	}
	printf("The test wave file is open successfully!\n");
	
	if(!raw)
	{
	 /* Parse wave file... */
	 if (!(n = read(fd_file, &wav, sizeof(wav)))) 
	 {
	  	//printf("ERROR: failed to read wave header!\n");
		printf("ERROR: failed to read wave file!\n");
	  	exit(3);
	 }
	 
	 wav.riffid = SWAPLONG(wav.riffid);       //add
//	 wav.filesize = SWAPLONG(wav.filesize);
	 wav.waveid = SWAPLONG(wav.waveid);       //add
	 wav.fmtid = SWAPLONG(wav.fmtid);         //add
//	 wav.formattag = SWAPSHORT(wav.formattag);
//	 wav.channels = SWAPSHORT(wav.channels);
//	 wav.samplerate = SWAPLONG(wav.samplerate);
//	 wav.bytespersec = SWAPLONG(wav.bytespersec);
//	 wav.samplesize = SWAPSHORT(wav.samplesize);
//	 wav.bitspersample = SWAPSHORT(wav.bitspersample);
	 
	 if (verbose) 
	 {
	  	printf("FILE=%s\n  Type=0x%x\n  File Length=%d\n", WAVEFILE, wav.riffid, wav.filesize);
		printf("  Hdr len=%d\n  Formattatg=%d\n", wav.hdrlen, wav.formattag);   //add
	  	printf("  Channels=%d\n  Sample Rate=%d\n  Bytes Per Second=%d\n  Sample Size=%d\n  Bits per Sample=%d\n", 
	        	wav.channels, wav.samplerate, wav.bytespersec, wav.samplesize, wav.bitspersample);
	 }
	 
	 if (wav.riffid != WAV_RIFFTYPE) 
	 {
	  	printf("ERROR: unknown file type, riffid=%x??\n", wav.riffid);
	  	exit(4);
	 }
	 if (wav.waveid != WAV_WAVETYPE) 
	 {
	  	printf("ERROR: unknown file type, waveid=%x??\n", wav.waveid);
	  	exit(5);
	 }
	 if (wav.fmtid != WAV_FMTTYPE) 
	 {
	  	printf("ERROR: unknown file type, fmtid=%x??\n", wav.fmtid);
	  	exit(6);
	 }

	 if (freq == 0)
	 	freq = wav.samplerate;
	 if (chans == 0)
	  	chans = wav.channels;
	 if (bitspersample == 0)
	  	bitspersample = wav.bitspersample;
	}
	/* Set any remaining defaults if neccessary */
	if (freq == 0)
		freq = 8000;
	if (chans == 0)
		chans = 1;
	if (bitspersample == 0)
		bitspersample = 8;
	
	if(ioctl(fd_dev, SNDCTL_DSP_SPEED, &freq) < 0)
	{
	 	printf("ERROR: ioctl speed failed!\n");
	 	exit(7);
	}
	
	if(ioctl(fd_dev, SNDCTL_DSP_STEREO, &chans) < 0)
	{
	 	printf("ERROR: ioctl stereo failed!\n");
	 	exit(8);
	}
	
	if(ioctl(fd_dev, SNDCTL_DSP_SAMPLESIZE, &bitspersample) < 0)
	{
		printf("ERROR: ioctl samplesize failed!\n");
	 	exit(9);
	}	
	
	//wav.datasize = SWAPLONG(wav.datasize);       //add
	printf("  Data size: %d\n", wav.datasize);
	data_size = wav.datasize >> 1;
	
	/* Now playing the wave file */
	ret = write(fd_dev, &wav.databuf, data_size);
	if(ret < 0)
	{
	 	printf("Write Audio error!\n");
	 	exit(10);
	}
	
	close(fd_file);
	printf("Close the test wave file!\n");
	
	close(fd_dev);
	printf("Close the audio device!\n");
	
	return 0;	 
}