#include <assert.h>
#include <errno.h>
#include <netinet/in.h>
+#include <sys/time.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <fcntl.h>
#include "log.h"
#include "mem.h"
#include "timeval.h"
#include "client.h"
#include "playrtp.h"
+#include "inputline.h"
+#include "version.h"
#define readahead linux_headers_are_borked
HEAP_DEFINE(pheap, struct packet *, lt_packet);
+/** @brief Control socket or NULL */
+const char *control_socket;
+
+/** @brief Buffer for debugging dump
+ *
+ * The debug dump is enabled by the @c --dump option. It records the last 20s
+ * of audio to the specified file (which will be about 3.5Mbytes). The file is
+ * written as as ring buffer, so the start point will progress through it.
+ *
+ * Use clients/dump2wav to convert this to a WAV file, which can then be loaded
+ * into (e.g.) Audacity for further inspection.
+ *
+ * All three backends (ALSA, OSS, Core Audio) now support this option.
+ *
+ * The idea is to allow the user a few seconds to react to an audible artefact.
+ */
+int16_t *dump_buffer;
+
+/** @brief Current index within debugging dump */
+size_t dump_index;
+
+/** @brief Size of debugging dump in samples */
+size_t dump_size = 44100/*Hz*/ * 2/*channels*/ * 20/*seconds*/;
+
static const struct option options[] = {
{ "help", no_argument, 0, 'h' },
{ "version", no_argument, 0, 'V' },
{ "max", required_argument, 0, 'x' },
{ "buffer", required_argument, 0, 'b' },
{ "rcvbuf", required_argument, 0, 'R' },
- { "multicast", required_argument, 0, 'M' },
#if HAVE_SYS_SOUNDCARD_H || EMPEG_HOST
{ "oss", no_argument, 0, 'o' },
#endif
#if HAVE_COREAUDIO_AUDIOHARDWARE_H
{ "core-audio", no_argument, 0, 'c' },
#endif
+ { "dump", required_argument, 0, 'r' },
+ { "socket", required_argument, 0, 's' },
{ "config", required_argument, 0, 'C' },
{ 0, 0, 0, 0 }
};
+/** @brief Control thread
+ *
+ * This thread is responsible for accepting control commands from Disobedience
+ * (or other controllers) over an AF_UNIX stream socket with a path specified
+ * by the @c --socket option. The protocol uses simple string commands and
+ * replies:
+ *
+ * - @c stop will shut the player down
+ * - @c query will send back the reply @c running
+ * - anything else is ignored
+ *
+ * Commands and response strings terminated by shutting down the connection or
+ * by a newline. No attempt is made to multiplex multiple clients so it is
+ * important that the command be sent as soon as the connection is made - it is
+ * assumed that both parties to the protocol are entirely cooperating with one
+ * another.
+ */
+static void *control_thread(void attribute((unused)) *arg) {
+ struct sockaddr_un sa;
+ int sfd, cfd;
+ char *line;
+ socklen_t salen;
+ FILE *fp;
+
+ assert(control_socket);
+ unlink(control_socket);
+ memset(&sa, 0, sizeof sa);
+ sa.sun_family = AF_UNIX;
+ strcpy(sa.sun_path, control_socket);
+ sfd = xsocket(PF_UNIX, SOCK_STREAM, 0);
+ if(bind(sfd, (const struct sockaddr *)&sa, sizeof sa) < 0)
+ fatal(errno, "error binding to %s", control_socket);
+ if(listen(sfd, 128) < 0)
+ fatal(errno, "error calling listen on %s", control_socket);
+ info("listening on %s", control_socket);
+ for(;;) {
+ salen = sizeof sa;
+ cfd = accept(sfd, (struct sockaddr *)&sa, &salen);
+ if(cfd < 0) {
+ switch(errno) {
+ case EINTR:
+ case EAGAIN:
+ break;
+ default:
+ fatal(errno, "error calling accept on %s", control_socket);
+ }
+ }
+ if(!(fp = fdopen(cfd, "r+"))) {
+ error(errno, "error calling fdopen for %s connection", control_socket);
+ close(cfd);
+ continue;
+ }
+ if(!inputline(control_socket, fp, &line, '\n')) {
+ if(!strcmp(line, "stop")) {
+ info("stopped via %s", control_socket);
+ exit(0); /* terminate immediately */
+ }
+ if(!strcmp(line, "query"))
+ fprintf(fp, "running");
+ xfree(line);
+ }
+ if(fclose(fp) < 0)
+ error(errno, "error closing %s connection", control_socket);
+ }
+}
+
/** @brief Drop the first packet
*
* Assumes that @ref lock is held.
*/
static void play_rtp(void) {
pthread_t ltid;
+ int err;
/* We receive and convert audio data in a background thread */
- pthread_create(<id, 0, listen_thread, 0);
+ if((err = pthread_create(<id, 0, listen_thread, 0)))
+ fatal(err, "pthread_create listen_thread");
/* We have a second thread to add received packets to the queue */
- pthread_create(<id, 0, queue_thread, 0);
+ if((err = pthread_create(<id, 0, queue_thread, 0)))
+ fatal(err, "pthread_create queue_thread");
/* The rest of the work is backend-specific */
backend();
}
" --buffer, -b FRAMES Buffer high water mark\n"
" --max, -x FRAMES Buffer maximum size\n"
" --rcvbuf, -R BYTES Socket receive buffer size\n"
- " --multicast, -M GROUP Join multicast group\n"
" --config, -C PATH Set configuration file\n"
#if HAVE_ALSA_ASOUNDLIB_H
" --alsa, -a Use ALSA to play audio\n"
exit(0);
}
-/* display version number and terminate */
-static void version(void) {
- xprintf("disorder-playrtp version %s\n", disorder_version_string);
- xfclose(stdout);
- exit(0);
-}
-
int main(int argc, char **argv) {
- int n;
+ int n, err;
struct addrinfo *res;
struct stringlist sl;
char *sockname;
int rcvbuf, target_rcvbuf = 131072;
socklen_t len;
- char *multicast_group = 0;
struct ip_mreq mreq;
struct ipv6_mreq mreq6;
disorder_client *c;
char *address, *port;
+ int is_multicast;
+ union any_sockaddr {
+ struct sockaddr sa;
+ struct sockaddr_in in;
+ struct sockaddr_in6 in6;
+ };
+ union any_sockaddr mgroup;
+ const char *dumpfile = 0;
static const struct addrinfo prefs = {
AI_PASSIVE,
mem_init();
if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale");
- while((n = getopt_long(argc, argv, "hVdD:m:b:x:L:R:M:aocC:", options, 0)) >= 0) {
+ while((n = getopt_long(argc, argv, "hVdD:m:b:x:L:R:M:aocC:r", options, 0)) >= 0) {
switch(n) {
case 'h': help();
- case 'V': version();
+ case 'V': version("disorder-playrtp");
case 'd': debugging = 1; break;
case 'D': device = optarg; break;
case 'm': minbuffer = 2 * atol(optarg); break;
case 'x': maxbuffer = 2 * atol(optarg); break;
case 'L': logfp = fopen(optarg, "w"); break;
case 'R': target_rcvbuf = atoi(optarg); break;
- case 'M': multicast_group = optarg; break;
#if HAVE_ALSA_ASOUNDLIB_H
case 'a': backend = playrtp_alsa; break;
#endif
case 'c': backend = playrtp_coreaudio; break;
#endif
case 'C': configfile = optarg; break;
+ case 's': control_socket = optarg; break;
+ case 'r': dumpfile = optarg; break;
default: fatal(0, "invalid option");
}
}
argv += optind;
switch(argc) {
case 0:
- case 1:
+ /* Get configuration from server */
if(!(c = disorder_new(1))) exit(EXIT_FAILURE);
if(disorder_connect(c)) exit(EXIT_FAILURE);
if(disorder_rtp_address(c, &address, &port)) exit(EXIT_FAILURE);
- sl.n = 1;
- sl.s = &port;
- /* set multicast_group if address is a multicast address */
+ sl.n = 2;
+ sl.s = xcalloc(2, sizeof *sl.s);
+ sl.s[0] = address;
+ sl.s[1] = port;
break;
+ case 1:
case 2:
+ /* Use command-line ADDRESS+PORT or just PORT */
sl.n = argc;
sl.s = argv;
break;
default:
- fatal(0, "usage: disorder-playrtp [OPTIONS] [ADDRESS [PORT]]");
+ fatal(0, "usage: disorder-playrtp [OPTIONS] [[ADDRESS] PORT]");
}
- /* Listen for inbound audio data */
+ /* Look up address and port */
if(!(res = get_address(&sl, &prefs, &sockname)))
exit(1);
- info("listening on %s", sockname);
+ /* Create the socket */
if((rtpfd = socket(res->ai_family,
res->ai_socktype,
res->ai_protocol)) < 0)
fatal(errno, "error creating socket");
+ /* Stash the multicast group address */
+ if((is_multicast = multicast(res->ai_addr))) {
+ memcpy(&mgroup, res->ai_addr, res->ai_addrlen);
+ switch(res->ai_addr->sa_family) {
+ case AF_INET:
+ mgroup.in.sin_port = 0;
+ break;
+ case AF_INET6:
+ mgroup.in6.sin6_port = 0;
+ break;
+ }
+ }
+ /* Bind to 0/port */
+ switch(res->ai_addr->sa_family) {
+ case AF_INET:
+ memset(&((struct sockaddr_in *)res->ai_addr)->sin_addr, 0,
+ sizeof (struct in_addr));
+ break;
+ case AF_INET6:
+ memset(&((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 0,
+ sizeof (struct in6_addr));
+ break;
+ default:
+ fatal(0, "unsupported family %d", (int)res->ai_addr->sa_family);
+ }
if(bind(rtpfd, res->ai_addr, res->ai_addrlen) < 0)
fatal(errno, "error binding socket to %s", sockname);
- if(multicast_group) {
- if((n = getaddrinfo(multicast_group, 0, &prefs, &res)))
- fatal(0, "getaddrinfo %s: %s", multicast_group, gai_strerror(n));
- switch(res->ai_family) {
+ if(is_multicast) {
+ switch(mgroup.sa.sa_family) {
case PF_INET:
- mreq.imr_multiaddr = ((struct sockaddr_in *)res->ai_addr)->sin_addr;
+ mreq.imr_multiaddr = mgroup.in.sin_addr;
mreq.imr_interface.s_addr = 0; /* use primary interface */
if(setsockopt(rtpfd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
&mreq, sizeof mreq) < 0)
fatal(errno, "error calling setsockopt IP_ADD_MEMBERSHIP");
break;
case PF_INET6:
- mreq6.ipv6mr_multiaddr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
+ mreq6.ipv6mr_multiaddr = mgroup.in6.sin6_addr;
memset(&mreq6.ipv6mr_interface, 0, sizeof mreq6.ipv6mr_interface);
if(setsockopt(rtpfd, IPPROTO_IPV6, IPV6_JOIN_GROUP,
&mreq6, sizeof mreq6) < 0)
default:
fatal(0, "unsupported address family %d", res->ai_family);
}
- }
+ info("listening on %s multicast group %s",
+ format_sockaddr(res->ai_addr), format_sockaddr(&mgroup.sa));
+ } else
+ info("listening on %s", format_sockaddr(res->ai_addr));
len = sizeof rcvbuf;
if(getsockopt(rtpfd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, &len) < 0)
fatal(errno, "error calling getsockopt SO_RCVBUF");
info("default socket receive buffer %d", rcvbuf);
if(logfp)
info("WARNING: -L option can impact performance");
+ if(control_socket) {
+ pthread_t tid;
+
+ if((err = pthread_create(&tid, 0, control_thread, 0)))
+ fatal(err, "pthread_create control_thread");
+ }
+ if(dumpfile) {
+ int fd;
+ unsigned char buffer[65536];
+ size_t written;
+
+ if((fd = open(dumpfile, O_RDWR|O_TRUNC|O_CREAT, 0666)) < 0)
+ fatal(errno, "opening %s", dumpfile);
+ /* Fill with 0s to a suitable size */
+ memset(buffer, 0, sizeof buffer);
+ for(written = 0; written < dump_size * sizeof(int16_t);
+ written += sizeof buffer) {
+ if(write(fd, buffer, sizeof buffer) < 0)
+ fatal(errno, "clearing %s", dumpfile);
+ }
+ /* Map the buffer into memory for convenience */
+ dump_buffer = mmap(0, dump_size * sizeof(int16_t), PROT_READ|PROT_WRITE,
+ MAP_SHARED, fd, 0);
+ if(dump_buffer == (void *)-1)
+ fatal(errno, "mapping %s", dumpfile);
+ info("dumping to %s", dumpfile);
+ }
play_rtp();
return 0;
}
~mdw / disorder / blobdiff