wave.c

GPRS打电话

/*
 * =====================================================================================
 *
 *       Filename:  wave.c
 *
 *    Description:  
 *
 *        Version:  1.0
 *        Created:  2009年01月17日 20时52分25秒
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  杨小合 (CH), [e-mail] QQ:475094605
 *        Company:  Student
 *
 * =====================================================================================
 */
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<unistd.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<sys/ioctl.h>
#include<fcntl.h>
#include<linux/sound.h>
#include<linux/soundcard.h>

#include "option.h"
#include "wave.h"

//信号量
static int openAudio(int fd)
{
	return open(AUDIO,O_WRONLY);
}
//信号量
static int closeAudio(int fd)
{
	return close(fd);
}

int recordWav(char *file)
{
	int fd_dev,fd_d;
	int result,ret;
	char buf[4096];
	struct wave_s wave=
	{
		"RIFF",
		0,
		"WAVEfmt",
		18,
		1,
		1,
		16000,
		16000,
		1,
		8,
		{"data",0}
	};
/*
	printf("file_length=%d\n",wave.file_length);
	printf("nChunkSize=%d\n",wave.nChunkSize);
	printf("wFormatTag2=%d\n",wave.wFormatTag2);
	printf("nChannels=%d\n",wave.nChannels);
	printf("nSamplesPerSec=%d\n",wave.nSamplesPerSec);
	printf("nAvgBytesPerSec=%d\n",wave.nAvgBytesPerSec);
	printf("nBlockAlign=%d\n",wave.nBlockAlign);
	printf("nBitPerSample=%d\n",wave.nBitPerSample);
	printf("wave_d nDataBytes=%d\n",wave.data.nDataBytes);
	return 0;
*/

	if((fd_dev=openAudio(fd_dev))==-1)
	{
		fprintf(stderr,"Failed to open audio device\n");
		return 0;
	}
	GPRSD_DEBUG("openAUdio OK!\n",NULL);
	//打开WAVE文件
	if((fd_d=open(file,O_WRONLY | O_CREAT | O_TRUNC))==-1)
	{
		fprintf(stderr,"Failed to open ./test.wav file\n");
		return 0;
	}
	GPRSD_DEBUG("Open %s OK!\n",file);

//	设置音频通道数
	ioctl(fd_dev,SOUND_PCM_WRITE_CHANNELS,wave.nChannels);
//	设置音频采样率
	ioctl(fd_dev,SOUND_PCM_WRITE_RATE,wave.nSamplesPerSec);
//	设置音频量化精度
	ioctl(fd_dev,SOUND_PCM_WRITE_BITS,wave.nBitPerSample);

	result=write(fd_d,&wave,sizeof(struct wave_s));
	if(result<0)
	{
		printf("Write File error.\n");
		return 0;
	}
	while(wave_status)
	{
		result=read(fd_dev,buf,sizeof(buf));
		if(result<0)
		{
			printf("Read File error.\n");
			return 0;
		}
		ret=write(fd_d,buf,result);
		if(ret<0)
		{
			printf("Write Audio error.\n");
			return 0;
		}
	}
	close(fd_d);
	closeAudio(fd_dev);
	return 0;
}

void *playWav(char *file)
{
	int fd_dev,fd_file;
	int result,ret;
	struct wave_s *wave_head;

	char buf[4096];
	//打开音频设备文件
	if((fd_dev=openAudio(fd_dev))==-1)
	{
		fprintf(stderr,"Failed to open audio device\n");
		return 0;
	}
	//打开WAVE文件
	if((fd_file=open(WAVEFILE,O_RDONLY))==-1)
	{
		fprintf(stderr,"Failed to open ./test.wav file\n");
		return 0;
	}
	//读取音频文件头信息
	result=read(fd_file,buf,sizeof(struct wave_s));
	if(result<0)
	{
		fprintf(stderr,"Read wave file error.\n");
		return 0;
	}
	//固定标记"RIFF"
	wave_head=(struct wave_s*)buf;
	if((wave_head->format1[0]!='R')||(wave_head->format1[1]!='I')||
			(wave_head->format1[2]!='F')||(wave_head->format1[3]!='F'))
	{
		fprintf(stderr,"File format(1) error. \n");
		return 0;
	}

	printf("File length=%d\n",wave_head->file_length);
//	对比文件格式
	wave_head->format2[7]='\0';
	if(strcmp(wave_head->format2,"WAVEfmt")!=0)
	{
		fprintf(stderr,"File format(2) error.\n");
		return 0;
	}
//	设置音频通道数
	printf("Channels=%d\n",wave_head->nChannels);
	printf("IO ctrl Channels\n");
	ioctl(fd_dev,SOUND_PCM_WRITE_CHANNELS,wave_head->nChannels);
//	设置音频采样率
	printf("Samples Per Sec=%d\n",wave_head->nSamplesPerSec);
	printf("IO ctrl SamplesPerSec\n");
	ioctl(fd_dev,SOUND_PCM_WRITE_RATE,wave_head->nSamplesPerSec);

//	设置音频量化精度
	printf("Bits Per Sample=%d\n",wave_head->nBitPerSample);
	printf("IO ctrl Bits Per Sample\n");
	ioctl(fd_dev,SOUND_PCM_WRITE_BITS,wave_head->nBitPerSample);
//	查看WAVE文件中的音频数据的长度
	printf("%s\n",wave_head->data.format3);
	if((wave_head->data.format3[0]!='d')||(wave_head->data.format3[1]!='a')||
		(wave_head->data.format3[2]!='t')||(wave_head->data.format3[3]!='a'))
	{
		fprintf(stderr,"File format(3) is Unknown.\n");
	}
	else
	{
		fprintf(stderr,"File format(3) is data.\n");
	}

	printf("Total Data Bytes=%d\n",wave_head->data.nDataBytes);
//	播放音频文件
	while(result)
	{
		result=read(fd_file,buf,sizeof(buf));
		if(result<0)
		{
			printf("Read File error.\n");
			return 0;
		}
		ret=write(fd_dev,buf,result);
		if(ret<0)
		{
			printf("Write Audio error.\n");
			return 0;
		}
		fprintf(stderr,".");
	}
	close(fd_file);
	printf("Close Wave File:%s\n",WAVEFILE);
	closeAudio(fd_dev);
	printf("Close device File:/dev/audio\n");
	return (void*)0;
}