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M17_UDP
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m17_udp_listener decoding m17 traffic!

master
mach327 2020-08-31 05:40:10 -04:00
parent 6b650f6591
commit f229557963
2 changed files with 6 additions and 5 deletions
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2
README.md
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@ -3,3 +3,5 @@ Receives voice packets via UDP and allows to play them back using aplay.
# Usage # Usage
./m17_udp | aplay -t raw -f S16_LE -r 8000 -c 1 ./m17_udp | aplay -t raw -f S16_LE -r 8000 -c 1
or maybe
./m17_udp | aplay -t raw -f S16_BE -r 8000 -c 1

9
main.c
View File

@ -107,7 +107,7 @@ int main(int argc, char *argv[])
return 1; return 1;
} }
if(rcv_len==15) if(rcv_len==50)
{ {
uint64_t tmp; uint64_t tmp;
tmp=(bits[0]<<(5*8))|(bits[1]<<(4*8))|(bits[2]<<(3*8))|(bits[3]<<(2*8))|(bits[4]<<(1*8))|bits[5]; tmp=(bits[0]<<(5*8))|(bits[1]<<(4*8))|(bits[2]<<(3*8))|(bits[3]<<(2*8))|(bits[4]<<(1*8))|bits[5];
@ -118,11 +118,10 @@ int main(int argc, char *argv[])
//info //info
printf("%s\t\t%s\t\t%04X\n", src, dst, type); printf("%s\t\t%s\t\t%04X\n", src, dst, type);
size_t frame1_offset = 32, frame2_offset =frame1_offset+8;
/*
//reconstruct speech //reconstruct speech
codec2_decode(cod, &speech_buff[0], &bits[0]); codec2_decode(cod, &speech_buff[0], &bits[frame1_offset]);
codec2_decode(cod, &speech_buff[160], &bits[8]); codec2_decode(cod, &speech_buff[160], &bits[frame2_offset]);
//send to stdout for playback //send to stdout for playback
for(uint16_t i=0; i<320*2; i++) for(uint16_t i=0; i<320*2; i++)