UDP_AUDIO.zip_arm_arm音频采集_audio_音频 udp_音频客户端

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <netinet/in.h> #include <arpa/inet.h> #include <unistd.h> #include <fcntl.h> #include <sys/stat.h> #include <sys/types.h> #include <sys/socket.h> #include <sys/ioctl.h> #include <linux/soundcard.h> #define LOCALPORT 4567 #define LENGTH 2 #define RATE 8000 #define SIZE 8 #define CHANNELS 1 unsigned char buf[LENGTH*RATE*SIZE*CHANNELS/8*100]; int main(int argc,char *argv[]) { int mysock,len; struct sockaddr_in addr; int i=0; //char msg[256]; int addr_len; if((mysock=socket(AF_INET,SOCK_DGRAM,0))<0) { perror("error"); exit(1); } else { printf("socket created .\n"); printf("socketet id:%d \n",mysock); } addr_len=sizeof(struct sockaddr_in); bzero(&addr,sizeof(addr)); addr.sin_family=AF_INET; addr.sin_port=htons(LOCALPORT); addr.sin_addr.s_addr=htonl(INADDR_ANY); if(bind(mysock,(struct sockaddr *)&addr,sizeof(struct sockaddr))<0) { perror("connect"); exit(1); } else { printf("bind ok.\n"); printf("local port :%d \n",LOCALPORT); } int fd; int arg; int status; fd = open("/dev/dsp", O_RDWR); if (fd < 0) { perror("open of /dev/dsp failed"); exit(1); } arg = SIZE; status = ioctl(fd, SOUND_PCM_WRITE_BITS, &arg); if (status == -1) perror("SOUND_PCM_WRITE_BITS ioctl failed"); if (arg != SIZE) perror("unable to set sample size"); arg = CHANNELS; status = ioctl(fd, SOUND_PCM_WRITE_CHANNELS, &arg); if (status == -1) perror("SOUND_PCM_WRITE_CHANNELS ioctl failed"); if (arg != CHANNELS) perror("unable to set number of channels"); arg = RATE; status = ioctl(fd, SOUND_PCM_WRITE_RATE, &arg); if (status == -1) perror("SOUND_PCM_WRITE_WRITE ioctl failed"); while(1) { printf("You said:\n"); bzero(buf,sizeof(buf)); len=recvfrom(mysock,buf,sizeof(buf),0,(struct sockaddr *)&addr,&addr_len); status = write(fd, buf, sizeof(buf)); if (status != sizeof(buf)) perror("wrote wrong number of bytes"); status = ioctl(fd, SOUND_PCM_SYNC, 0); if (status == -1) perror("SOUND_PCM_SYNC ioctl failed"); printf("%d :",i); i++; printf("message from : %s \n",inet_ntoa(addr.sin_addr)); printf("message length : %d \n",len); printf("message : %s \n\n",buf); sendto(mysock,buf,len,0,(struct sockaddr *)&addr,addr_len); } }