/* $Id$ */ /*** This file is part of PulseAudio. PulseAudio is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. PulseAudio is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with PulseAudio; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. ***/ #ifdef HAVE_CONFIG_H #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "module-rtp-send-symdef.h" #include "rtp.h" #include "sdp.h" #include "sap.h" PA_MODULE_AUTHOR("Lennart Poettering") PA_MODULE_DESCRIPTION("Read data from source and send it to the network via RTP/SAP/SDP") PA_MODULE_VERSION(PACKAGE_VERSION) PA_MODULE_USAGE( "source= " "format= " "channels= " "rate= " "destination= " "port= " "mtu= " "loop=" ) #define DEFAULT_PORT 46000 #define SAP_PORT 9875 #define DEFAULT_DESTINATION "224.0.0.56" #define MEMBLOCKQ_MAXLENGTH (1024*170) #define DEFAULT_MTU 1280 #define SAP_INTERVAL 5000000 static const char* const valid_modargs[] = { "source", "format", "channels", "rate", "destination", "port", "loop", NULL }; struct userdata { pa_module *module; pa_core *core; pa_source_output *source_output; pa_memblockq *memblockq; pa_rtp_context rtp_context; pa_sap_context sap_context; size_t mtu; pa_time_event *sap_event; }; static void source_output_push(pa_source_output *o, const pa_memchunk *chunk) { struct userdata *u; assert(o); u = o->userdata; if (pa_memblockq_push(u->memblockq, chunk) < 0) { pa_log(__FILE__": Failed to push chunk into memblockq."); return; } pa_rtp_send(&u->rtp_context, u->mtu, u->memblockq); } static void source_output_kill(pa_source_output* o) { struct userdata *u; assert(o); u = o->userdata; pa_module_unload_request(u->module); pa_source_output_disconnect(u->source_output); pa_source_output_unref(u->source_output); u->source_output = NULL; } static pa_usec_t source_output_get_latency (pa_source_output *o) { struct userdata *u; assert(o); u = o->userdata; return pa_bytes_to_usec(pa_memblockq_get_length(u->memblockq), &o->sample_spec); } static void sap_event_cb(pa_mainloop_api *m, pa_time_event *t, const struct timeval *tv, void *userdata) { struct userdata *u = userdata; struct timeval next; assert(m); assert(t); assert(tv); assert(u); pa_sap_send(&u->sap_context, 0); pa_gettimeofday(&next); pa_timeval_add(&next, SAP_INTERVAL); m->time_restart(t, &next); } int pa__init(pa_core *c, pa_module*m) { struct userdata *u; pa_modargs *ma = NULL; const char *dest; uint32_t port = DEFAULT_PORT, mtu; int af, fd = -1, sap_fd = -1; pa_source *s; pa_sample_spec ss; pa_channel_map cm; struct sockaddr_in sa4, sap_sa4; struct sockaddr_in6 sa6, sap_sa6; struct sockaddr_storage sa_dst; pa_source_output *o = NULL; uint8_t payload; char *p; int r; socklen_t k; struct timeval tv; char hn[128], *n; int loop = 0; assert(c); assert(m); if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { pa_log(__FILE__": failed to parse module arguments"); goto fail; } if (!(s = pa_namereg_get(m->core, pa_modargs_get_value(ma, "source", NULL), PA_NAMEREG_SOURCE, 1))) { pa_log(__FILE__": source does not exist."); goto fail; } if (pa_modargs_get_value_boolean(ma, "loop", &loop) < 0) { pa_log(__FILE__": failed to parse \"loop\" parameter."); goto fail; } ss = s->sample_spec; pa_rtp_sample_spec_fixup(&ss); cm = s->channel_map; if (pa_modargs_get_sample_spec(ma, &ss) < 0) { pa_log(__FILE__": failed to parse sample specification"); goto fail; } if (!pa_rtp_sample_spec_valid(&ss)) { pa_log(__FILE__": specified sample type not compatible with RTP"); goto fail; } if (ss.channels != cm.channels) pa_channel_map_init_auto(&cm, ss.channels, PA_CHANNEL_MAP_AIFF); payload = pa_rtp_payload_from_sample_spec(&ss); mtu = (DEFAULT_MTU/pa_frame_size(&ss))*pa_frame_size(&ss); if (pa_modargs_get_value_u32(ma, "mtu", &mtu) < 0 || mtu < 1 || mtu % pa_frame_size(&ss) != 0) { pa_log(__FILE__": invalid mtu."); goto fail; } port = DEFAULT_PORT + ((rand() % 512) << 1); if (pa_modargs_get_value_u32(ma, "port", &port) < 0 || port < 1 || port > 0xFFFF) { pa_log(__FILE__": port= expects a numerical argument between 1 and 65535."); goto fail; } if (port & 1) pa_log_warn(__FILE__": WARNING: port number not even as suggested in RFC3550!"); dest = pa_modargs_get_value(ma, "destination", DEFAULT_DESTINATION); if (inet_pton(AF_INET6, dest, &sa6.sin6_addr) > 0) { sa6.sin6_family = af = AF_INET6; sa6.sin6_port = htons(port); sap_sa6 = sa6; sap_sa6.sin6_port = htons(SAP_PORT); } else if (inet_pton(AF_INET, dest, &sa4.sin_addr) > 0) { sa4.sin_family = af = AF_INET; sa4.sin_port = htons(port); sap_sa4 = sa4; sap_sa4.sin_port = htons(SAP_PORT); } else { pa_log(__FILE__": invalid destination '%s'", dest); goto fail; } if ((fd = socket(af, SOCK_DGRAM, 0)) < 0) { pa_log(__FILE__": socket() failed: %s", pa_cstrerror(errno)); goto fail; } if (connect(fd, af == AF_INET ? (struct sockaddr*) &sa4 : (struct sockaddr*) &sa6, af == AF_INET ? sizeof(sa4) : sizeof(sa6)) < 0) { pa_log(__FILE__": connect() failed: %s", pa_cstrerror(errno)); goto fail; } if ((sap_fd = socket(af, SOCK_DGRAM, 0)) < 0) { pa_log(__FILE__": socket() failed: %s", pa_cstrerror(errno)); goto fail; } if (connect(sap_fd, af == AF_INET ? (struct sockaddr*) &sap_sa4 : (struct sockaddr*) &sap_sa6, af == AF_INET ? sizeof(sap_sa4) : sizeof(sap_sa6)) < 0) { pa_log(__FILE__": connect() failed: %s", pa_cstrerror(errno)); goto fail; } if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, sizeof(loop)) < 0 || setsockopt(sap_fd, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, sizeof(loop)) < 0) { pa_log(__FILE__": IP_MULTICAST_LOOP failed: %s", pa_cstrerror(errno)); goto fail; } if (!(o = pa_source_output_new(s, __FILE__, "RTP Monitor Stream", &ss, &cm, PA_RESAMPLER_INVALID))) { pa_log(__FILE__": failed to create source output."); goto fail; } o->push = source_output_push; o->kill = source_output_kill; o->get_latency = source_output_get_latency; o->owner = m; u = pa_xnew(struct userdata, 1); m->userdata = u; o->userdata = u; u->module = m; u->core = c; u->source_output = o; u->memblockq = pa_memblockq_new( 0, MEMBLOCKQ_MAXLENGTH, MEMBLOCKQ_MAXLENGTH, pa_frame_size(&ss), 1, 0, NULL, c->memblock_stat); u->mtu = mtu; k = sizeof(sa_dst); r = getsockname(fd, (struct sockaddr*) &sa_dst, &k); assert(r >= 0); n = pa_sprintf_malloc("PulseAudio RTP Stream on %s", pa_get_fqdn(hn, sizeof(hn))); p = pa_sdp_build(af, af == AF_INET ? (void*) &((struct sockaddr_in*) &sa_dst)->sin_addr : (void*) &((struct sockaddr_in6*) &sa_dst)->sin6_addr, af == AF_INET ? (void*) &sa4.sin_addr : (void*) &sa6.sin6_addr, n, port, payload, &ss); pa_xfree(n); pa_rtp_context_init_send(&u->rtp_context, fd, c->cookie, payload, pa_frame_size(&ss)); pa_sap_context_init_send(&u->sap_context, sap_fd, p); pa_log_info(__FILE__": RTP stream initialized with mtu %u on %s:%u, SSRC=0x%08x, payload=%u, initial sequence #%u", mtu, dest, port, u->rtp_context.ssrc, payload, u->rtp_context.sequence); pa_log_info(__FILE__": SDP-Data:\n%s\n"__FILE__": EOF", p); pa_sap_send(&u->sap_context, 0); pa_gettimeofday(&tv); pa_timeval_add(&tv, SAP_INTERVAL); u->sap_event = c->mainloop->time_new(c->mainloop, &tv, sap_event_cb, u); pa_modargs_free(ma); return 0; fail: if (ma) pa_modargs_free(ma); if (fd >= 0) close(fd); if (sap_fd >= 0) close(sap_fd); if (o) { pa_source_output_disconnect(o); pa_source_output_unref(o); } return -1; } void pa__done(pa_core *c, pa_module*m) { struct userdata *u; assert(c); assert(m); if (!(u = m->userdata)) return; c->mainloop->time_free(u->sap_event); if (u->source_output) { pa_source_output_disconnect(u->source_output); pa_source_output_unref(u->source_output); } pa_rtp_context_destroy(&u->rtp_context); pa_sap_send(&u->sap_context, 1); pa_sap_context_destroy(&u->sap_context); pa_memblockq_free(u->memblockq); pa_xfree(u); }