在android下跑失败，read读放回-1
#ifndef SNDTOOLS_H#define SNDTOOLS_H#include <linux/soundcard.h>#define FMT8BITS AFMT_S8_LE#define FMT16BITS AFMT_S16_LE#define FMT8K 8000#define FMT16K 16000#define FMT22K 22000#define FMT44K 44000#define MONO 1#define STERO 2#ifndef VAR_STATICextern int devfd;extern int CapMask;#endif //ifndef VAR_STATIC//Open sound device, return 1 if open success//else return 0int OpenSnd();//Close sound deviceint CloseSnd();//Set record or playback format, return 1 if success//else return 0int SetFormat(int bits, int hz);//Set record or playback channel, return 1 if success//else return 1int SetChannel(int chn);//Recordint Record(char *buf, int size);//Playbackint Play(char *buf, int size);#endif //ifndef SNDTOOLS_H
//**********************************************************************************************
源文件 sndtools.c
//**********************************************************************************************
#include <stdio.h>#include <fcntl.h>#include <unistd.h>#include <sys/ioctl.h>#include <string.h>#define VAR_STATIC#include "sndtools.h"int devfd = 0;/** Open Sound device* Return 1 if success, else return 0.*/int OpenSnd(/* add by new version */int nWhich){if(devfd > 0)close(devfd);devfd = open("/dev/snd/pcmC0D0c", O_RDWR);if(devfd < 0)return 0;return 1;}/** Close Sound device* return 1 if success, else return 0.*/int CloseSnd(/* add by new version */int nWhich){close(devfd);devfd = 0;return 1;}/** Set Record an Playback format* return 1 if success, else return 0.* bits — FMT8BITS(8bits), FMT16BITS(16bits)* hz — FMT8K(8000HZ), FMT16K(16000HZ), FMT22K(22000HZ), FMT44K(44000HZ)*/int SetFormat(int bits, int hz){int tmp = bits;if( -1 == ioctl(devfd, SNDCTL_DSP_SETFMT, &tmp)){#ifdef DEBUG_WARNprintf("Set fmt to s16_little faile:%d\\n", nWhich);#endifreturn 0;}tmp = hz;if( -1 == ioctl(devfd, SNDCTL_DSP_SPEED, &tmp)){#ifdef DEBUG_WARNprintf("Set speed to %d:%d\\n", hz, nWhich);#endifreturn 0;}return 1;}/** Set Sound Card Channel* return 1 if success, else return 0.* chn — MONO, STERO*/int SetChannel(int chn){int tmp = chn;if(-1 == ioctl(devfd, SNDCTL_DSP_CHANNELS, &tmp)){#ifdef DEBUG_WARNprintf("Set Audio Channel faile:%d\\n", nWhich);#endifreturn 0;}return 1;}/** Record* return numbers of byte for read.*/int Record(char *buf, int size){return read(devfd, buf, size);}/** Playback* return numbers of byte for write.*/int Play(char *buf, int size){return write(devfd, buf, size);}
//**********************************************************************************************
源文件 recorder.c
//**********************************************************************************************
#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include "sndtools.h"#define WAVOUTDEV FMT8Ktypedef unsigned int DWORD;typedef unsigned short int WORD;struct RIFF_HEADER{char szRiffID[4]; // ‘R’,’I’,’F’,’F’DWORD dwRiffSize;char szRiffFormat[4]; // ‘W’,’A’,’V’,’E’};struct WAVE_FORMAT{WORD wFormatTag;WORD wChannels;DWORD dwSamplesPerSec;DWORD dwAvgBytesPerSec;WORD wBlockAlign;WORD wBitsPerSample;};struct FMT_BLOCK{char szFmtID[4]; // ‘f’,’m’,’t’,’ ‘DWORD dwFmtSize;struct WAVE_FORMAT wavFormat;};struct FACT_BLOCK{char szFactID[4]; // ‘f’,’a’,’c’,’t’DWORD dwFactSize;};struct DATA_BLOCK{char szDataID[4]; // ‘d’,’a’,’t’,’a’DWORD dwDataSize;};int main(){char *buf;int dwSize;int i;struct RIFF_HEADER riffheader;struct FMT_BLOCK fmtblock;struct DATA_BLOCK datablock;FILE * fp;printf("WORD %d \n",sizeof(WORD));printf("DWORD %d\n",sizeof(DWORD));riffheader.szRiffID[0]=’R’;riffheader.szRiffID[1]=’I’;riffheader.szRiffID[2]=’F’;riffheader.szRiffID[3]=’F’;riffheader.dwRiffSize=1024*50+8+16+8+4;riffheader.szRiffFormat[0]=’W’;riffheader.szRiffFormat[1]=’A’;riffheader.szRiffFormat[2]=’V’;riffheader.szRiffFormat[3]=’E’;
fmtblock.szFmtID[0]=’f’;fmtblock.szFmtID[1]=’m’;fmtblock.szFmtID[2]=’t’;fmtblock.szFmtID[3]=’ ‘;fmtblock.dwFmtSize=16;fmtblock.wavFormat.wFormatTag=0x0001;fmtblock.wavFormat.wChannels=1;fmtblock.wavFormat.dwSamplesPerSec=8000;fmtblock.wavFormat.dwAvgBytesPerSec= 8000*2;////////////////////fmtblock.wavFormat.wBlockAlign=2;fmtblock.wavFormat.wBitsPerSample=16;
datablock.szDataID[0]=’d’;datablock.szDataID[1]=’a’;datablock.szDataID[2]=’t’;datablock.szDataID[3]=’a’;
datablock.dwDataSize=1024*50;
if((fp=fopen("test.wav","wb")) == NULL){ printf("Cannot open test.wav"); return;}fwrite(&riffheader,sizeof(riffheader),1,fp);fwrite(&fmtblock,sizeof(fmtblock),1,fp);fwrite(&datablock,sizeof(datablock),1,fp);
if(!OpenSnd()) {printf("Open sound device error!\\n");exit(-1);}SetFormat(FMT16BITS, FMT8K);SetChannel(MONO);buf = (char *)malloc(1024);if(buf == NULL)exit(-1);for(i = 0; i <50; i++){printf("%d \n",i);dwSize = Record(buf, 1024);fwrite(buf,dwSize,1,fp);//dwSize = Play(buf, dwSize);}fclose(fp);exit(1);}
如果雨后还是雨，如果忧伤过后还是忧伤，
