| @@ -0,0 +1,71 @@ |
| 1 | +#include <stdio.h> |
| 2 | +#include <string.h> |
| 3 | +#include <pulse/simple.h> |
| 4 | +#include <pulse/error.h> |
| 5 | + |
| 6 | +#include <sys/socket.h> |
| 7 | +#include <netinet/in.h> |
| 8 | + |
| 9 | +#define MULTICAST_TARGET "239.255.77.77" |
| 10 | +#define MULTICAST_PORT 4010 |
| 11 | +#define MAX_SO_PACKETSIZE 1764 |
| 12 | +#define MIN_PA_PACKETSIZE MAX_SO_PACKETSIZE |
| 13 | +#define BUFFER_SIZE MIN_PA_PACKETSIZE * 2 |
| 14 | + |
| 15 | +int main(int argc, char*argv[]) { |
| 16 | + int sockfd, error; |
| 17 | + ssize_t n; |
| 18 | + int offset; |
| 19 | + struct sockaddr_in servaddr; |
| 20 | + struct ip_mreq imreq; |
| 21 | + pa_simple *s; |
| 22 | + pa_sample_spec ss; |
| 23 | + unsigned char buf[BUFFER_SIZE]; |
| 24 | + |
| 25 | + ss.format = PA_SAMPLE_S16NE; |
| 26 | + ss.channels = 2; |
| 27 | + ss.rate = 44100; |
| 28 | + s = pa_simple_new(NULL, |
| 29 | + "Scream", |
| 30 | + PA_STREAM_PLAYBACK, |
| 31 | + NULL, |
| 32 | + "Audio", |
| 33 | + &ss, |
| 34 | + NULL, |
| 35 | + NULL, |
| 36 | + NULL |
| 37 | + ); |
| 38 | + if (!s) goto BAIL; |
| 39 | + |
| 40 | + sockfd = socket(AF_INET,SOCK_DGRAM,0); |
| 41 | + |
| 42 | + memset((void *)&servaddr, 0, sizeof(servaddr)); |
| 43 | + servaddr.sin_family = AF_INET; |
| 44 | + servaddr.sin_addr.s_addr = htonl(INADDR_ANY); |
| 45 | + servaddr.sin_port = htons(MULTICAST_PORT); |
| 46 | + bind(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)); |
| 47 | + |
| 48 | + imreq.imr_multiaddr.s_addr = inet_addr(MULTICAST_TARGET); |
| 49 | + imreq.imr_interface.s_addr = INADDR_ANY; |
| 50 | + |
| 51 | + setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, |
| 52 | + (const void *)&imreq, sizeof(struct ip_mreq)); |
| 53 | + |
| 54 | + offset = 0; |
| 55 | + for (;;) { |
| 56 | + n = recvfrom(sockfd, &buf[offset], MAX_SO_PACKETSIZE, 0, NULL, 0); |
| 57 | + if (n > 0) { |
| 58 | + offset += n; |
| 59 | + if (offset >= MIN_PA_PACKETSIZE) { |
| 60 | + if (pa_simple_write(s, buf, offset, &error) < 0) { |
| 61 | + printf("pa_simple_write() failed: %s\n", pa_strerror(error)); |
| 62 | + goto BAIL; |
| 63 | + } |
| 64 | + offset = 0; |
| 65 | + } |
| 66 | + } |
| 67 | + } |
| 68 | + |
| 69 | + BAIL: |
| 70 | + if (s) pa_simple_free(s); |
| 71 | +}; |