#include "tcp.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <pthread.h>
#include <math.h>
#include "sys/stat.h"
#include "fcntl.h"
#include "sys/ioctl.h"
#include "signal.h"
#include "sys/select.h"
#include "poll.h"
void thread_func(void *s)
{
long loops;
int rc;
int size;
snd_pcm_t *handle;
snd_pcm_hw_params_t *params;
unsigned int val;
int dir;
snd_pcm_uframes_t frames;
char *buffer;
/* Open PCM device for playback. */
rc = snd_pcm_open(&handle, "hw:1,0",
SND_PCM_STREAM_CAPTURE, 0);
if (rc < 0)
{
fprintf(stderr,"unable to open pcm device: %s
",snd_strerror(rc));
exit(1);
}
/* Allocate a hardware parameters object. */
snd_pcm_hw_params_alloca(¶ms);
/* Fill it in with default values. */
snd_pcm_hw_params_any(handle, params);
/* Set the desired hardware parameters. */
/* Interleaved mode */
snd_pcm_hw_params_set_access(handle, params,
SND_PCM_ACCESS_RW_INTERLEAVED);
/* Signed 16-bit little-endian format */
snd_pcm_hw_params_set_format(handle, params,
SND_PCM_FORMAT_S16_LE);
/* Two channels (stereo) */
snd_pcm_hw_params_set_channels(handle, params, 4);
/* 44100 bits/second sampling rate (CD quality) */
val = 44100;
snd_pcm_hw_params_set_rate_near(handle, params,
&val, &dir);
/* Set period size to 32 frames. */
frames = 1024;
snd_pcm_hw_params_set_period_size_near(handle,
params, &frames, &dir);
/* Write the parameters to the driver */
rc = snd_pcm_hw_params(handle, params);
if (rc < 0) {
fprintf(stderr,
"unable to set hw parameters: %s
",
snd_strerror(rc));
exit(1);
}
/* Use a buffer large enough to hold one period */
snd_pcm_hw_params_get_period_size(params, &frames,
&dir);
size = frames * 8; /* 2 bytes/sample, 2 channels */
buffer = (char *) malloc(size);
/* We want to loop for 5 seconds */
snd_pcm_hw_params_get_period_time(params,&val, &dir);
/* 5 seconds in microseconds divided by
* period time */
loops = 3000000 / val;
while (Mic_test) //循环录音 5 s
{
loops--;
rc = snd_pcm_readi(handle, buffer, frames);
if (rc == 0) //没有读取到数据
{
fprintf(stderr, "end of file on input
");
break;
}
else if (rc != size)//实际读取 的数据 小于 要读取的数据
{
//fprintf(stderr,"short read: read %d bytes
", rc);
}
TransformData(buffer,32);
}
snd_pcm_drain(handle);
snd_pcm_close(handle);
free(buffer);
}
int TransformData(char *input_buffer, int frames)
{
char msg[1024] ;
int couns;
//4 channels
double doub_ch0 = 0.f;
double doub_ch1 = 0.f;
double doub_ch2 = 0.f;
double doub_ch3 = 0.f;
short short_ch0 = 0;
short short_ch1 = 0;
short short_ch2 = 0;
short short_ch3 = 0;
double sum0 = 0.f;
double sum1 = 0.f;
double sum2 = 0.f;
double sum3 = 0.f;
couns++;
if(couns > 6){
float f_2_15 = powf(2, 15);
// 2 bytes -- PCM_FORMAT_S16_LE
for(int i=0; i<frames * (DEVICES_MIC_CHS * 2); i=i + (DEVICES_MIC_CHS * 2) ){
// pcm reconstruction， little endian
short_ch0 = ( *(input_buffer + i + 1) <<8 | *(input_buffer + i + 0) );
short_ch1 = ( *(input_buffer + i + 3) <<8 | *(input_buffer + i + 2) );
short_ch2 = ( *(input_buffer + i + 5) <<8 | *(input_buffer + i + 4) );
short_ch3 = ( *(input_buffer + i + 7) <<8 | *(input_buffer + i + 6) );
doub_ch0 = short_ch0 / f_2_15;
doub_ch1 = short_ch1 / f_2_15;
doub_ch2 = short_ch2 / f_2_15;
doub_ch3 = short_ch3 / f_2_15;
sum0 += doub_ch0 * doub_ch0;
sum1 += doub_ch1 * doub_ch1;
sum2 += doub_ch2 * doub_ch2;
sum3 += doub_ch3 * doub_ch3;
}
//printf(" ---- dB ---- ch0:%d ch1:%d ch2:%d ch3:%d
", short_ch0, short_ch1, short_ch2, short_ch3 );
doub_ch0 = sqrt(sum0 / frames); doub_ch0 = 20 * log10(doub_ch0);
doub_ch1 = sqrt(sum1 / frames); doub_ch1 = 20 * log10(doub_ch1);
doub_ch2 = sqrt(sum2 / frames); doub_ch2 = 20 * log10(doub_ch2);
doub_ch3 = sqrt(sum3 / frames); doub_ch3 = 20 * log10(doub_ch3);
sprintf(msg,"ch0:%.1f ch1:%.1f ch2:%.1f ch3:%.1f
", doub_ch0, doub_ch1, doub_ch2, doub_ch3);
//printf(" msg = [%d]--
",strlen(msg));
write(connfd, msg, strlen(msg));
printf(" msg = [%s]--
",msg);
couns = 0;
}
return 0;
}
#include <string>
#include <vector>
#include "linux/input.h"
#include <iostream>
#define ALSA_PCM_NEW_HW_PARAMS_API
#include <time.h>
#include <alsa/asoundlib.h>
#define DEVICES_MIC_CHS 4
//#define _GLIBCXX_USE_CXX11_ABI 0
using namespace std;
enum EventType {
ledLightOut = 0x00,
ledWhiteOut ,
LedRedLight ,
LedGreenLight,
LedBlueLight ,
LedWaterLamp
};
#define MAXLINE 4096
#define BUFFSIZE 9600 // 48K / 20 * 4
#define BUFFSIZE_MIC 3200
#define X 17
#define Y 21
#define ROW 21
static int Volumecount;
static int lightecount;
static bool Mic_test = false;
static vector<string> shell_answer;
static std::vector<std::string> get_info;
static std::vector<std::string> get_info_2;
static std::vector<std::string> get_wifi_ip;
static struct input_event inputevent;
static int cycle = 1, mic_begin = 0, no_write = 0;
static int check_sta_to_end =0, enter_fact=0;
static int led_row = 0;
static int Led_len = 0;
static void Led_switch();
string array;
const char *abc;
char *str_return;
char VERSION[100];
char ss[4096];
int connfd;
编译时参考之前个人项目使用指令 g++ -o tcp tcp.cpp tcp.h -lasound -lpthread -lm