use round() in pcm volume gain

Signed-off-by: qshi <qshi@123456.com>

demo/recv_voice.c

@@ -1,82 +1,85 @@
-#include<stdio.h>
-#include<stdlib.h>
-#include<string.h>
-#include <signal.h>
-#include<unistd.h>
-#include<sys/types.h>
-#include<sys/socket.h>
-#include<netinet/in.h>
-#include <arpa/inet.h>
-#include <errno.h>  
-
-#define HOST_IF_IP "192.168.0.191"
-#define GROUP_ADDR "225.0.0.5"
-#define PORTRECV   8310
-
-static int got_sig = 0;
-
-static void sigterm(int nr)
-{
-	got_sig = 1;
-}
-
-int main(int argc, char *argv[])
-{
-	FILE *myfile;
-	int sock, count;
-	socklen_t slen;
-	struct sockaddr_in ser_addr;
-	struct ip_mreq mreq; 
-	int yes=1;
-	unsigned char buf[64] = {0};
-
-	signal(SIGTERM, sigterm);
-
-	sock = socket(AF_INET,SOCK_DGRAM,0);
-	printf("sockfd: %d\n",sock);
-	if (sock == -1) {
-		printf("socket error");
-		exit(1);
-	}
-
-	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,&yes,sizeof(yes)) < 0){  
-		perror("Reusing ADDR failed");  
-		exit(1);  
-	} 
-
-	memset(&ser_addr,0,sizeof(ser_addr));
-	ser_addr.sin_family      = AF_INET;  
-	ser_addr.sin_addr.s_addr = inet_addr(HOST_IF_IP);
-	ser_addr.sin_port        = htons(PORTRECV);
-	if (bind(sock,(struct sockaddr *) &ser_addr,sizeof(ser_addr)) < 0){  
-		perror("bind");  
-		exit(1);  
-	}  
-
-	mreq.imr_multiaddr.s_addr = inet_addr(GROUP_ADDR);
-	mreq.imr_interface.s_addr = inet_addr(HOST_IF_IP);
-	if (setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&mreq, sizeof(mreq)) < 0) {
-		perror("setsock");
-		close(sock);	
-		exit(1);  
-	}
-	myfile = fopen("output.raw", "w");
-	while (!got_sig) { 
-		slen = sizeof ser_addr;
-		memset(&ser_addr, 0, sizeof ser_addr);
-		memset(buf, 0, sizeof buf);
-		if ((count = recvfrom(sock, buf, sizeof buf, 0, (struct sockaddr *) &ser_addr,(socklen_t*)&slen)) < 0) {  
-			perror("recvfrom");  
-			exit(1);  
-		}
-
-		if (count == 64) {
-			if (buf[0] == 0xac && buf[1] == 0x93 && buf[63] == 0x14) {
-				fwrite(buf + 16, 1, 6, myfile);
-			}
-		}
-	}
-	fclose(myfile);
-	return 0;
-}
-
+#include<stdio.h>
+#include<stdlib.h>
+#include<string.h>
+#include <signal.h>
+#include<unistd.h>
+#include<sys/types.h>
+#include<sys/socket.h>
+#include<netinet/in.h>
+#include <arpa/inet.h>
+#include <errno.h>  
+
+#define HOST_IF_IP "192.168.31.89"
+#define GROUP_ADDR "225.0.0.5"
+#define PORTRECV   8310
+
+static int got_sig = 0;
+
+static void sigterm(int nr)
+{
+	got_sig = 1;
+}
+
+int main(int argc, char *argv[])
+{
+	FILE *myfile;
+	int sock, count;
+	socklen_t slen;
+	struct sockaddr_in ser_addr;
+	struct ip_mreq mreq; 
+	int yes=1;
+	unsigned char buf[64] = {0};
+
+	signal(SIGINT, sigterm);
+	sock = socket(AF_INET,SOCK_DGRAM,0);
+	printf("sockfd: %d\n",sock);
+	if (sock == -1) {
+		printf("socket error");
+		exit(1);
+	}
+
+	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,&yes,sizeof(yes)) < 0){  
+		perror("Reusing ADDR failed");  
+		exit(1);  
+	} 
+
+	memset(&ser_addr,0,sizeof(ser_addr));
+	ser_addr.sin_family      = AF_INET;  
+	ser_addr.sin_addr.s_addr = INADDR_ANY;//inet_addr(GROUP_ADDR);
+	ser_addr.sin_port        = htons(PORTRECV);
+	if (bind(sock,(struct sockaddr *) &ser_addr,sizeof(ser_addr)) < 0){  
+		perror("bind");  
+		exit(1);  
+	}  
+
+	mreq.imr_multiaddr.s_addr = inet_addr(GROUP_ADDR);
+	mreq.imr_interface.s_addr = inet_addr(HOST_IF_IP);
+	if (setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&mreq, sizeof(mreq)) < 0) {
+		perror("setsock");
+		close(sock);	
+		exit(1);  
+	}
+
+	myfile = fopen("output.raw", "w");
+	
+	while (!got_sig) { 
+		slen = sizeof ser_addr;
+		memset(&ser_addr, 0, sizeof ser_addr);
+		memset(buf, 0, sizeof buf);
+		if ((count = recvfrom(sock, buf, sizeof buf, 0, (struct sockaddr *) &ser_addr,(socklen_t*)&slen)) < 0) {  
+			perror("recvfrom");  
+			exit(1);  
+		}
+		printf("recv data %d\n", count);
+		if (count == 64) {
+			if (buf[0] == 0xac && buf[1] == 0x93 && buf[63] == 0x14) {
+				fwrite(buf + 16, 1, 6, myfile);
+			}
+		}
+		//fflush(myfile);	
+	}
+	printf("---------------\n");	
+	fclose(myfile);
+	return 0;
+}
+

src/common/config.h

@@ -4,6 +4,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdint.h>
+#include <math.h>
 #include <string.h>
 #include <unistd.h>
 #include <sys/timerfd.h>

src/common/pcm2alaw.c

@@ -160,7 +160,7 @@ int alaw2linear_buf_gain(unsigned char *lbuf, int llen, unsigned char *abuf, int
 	short *pcm16 = (short *)lbuf;
 
 	for (m = 0; m < alen; m++) {
-		pcm32 = alaw2linear(abuf[m]) * gain;
+		pcm32 = round(alaw2linear(abuf[m]) * gain);
 		if (pcm32 > 32767)
 			pcm32 = 32767;
 		if (pcm32 < -32768)

src/zkbrc.json

@@ -23,5 +23,5 @@
 	"audio_local_play":	1,
 	"down_audio_play":	[0, 0, 0, 0],
 	"alarm_audio_play":	1,
-	"play_volume":		9
+	"play_volume":		6
 }