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-rw-r--r--src/modules/rtp/module-rtp-monitor.c340
1 files changed, 340 insertions, 0 deletions
diff --git a/src/modules/rtp/module-rtp-monitor.c b/src/modules/rtp/module-rtp-monitor.c
new file mode 100644
index 00000000..66332093
--- /dev/null
+++ b/src/modules/rtp/module-rtp-monitor.c
@@ -0,0 +1,340 @@
+
+/***
+ This file is part of polypaudio.
+
+ polypaudio 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.
+
+ polypaudio 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 polypaudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <stdio.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <polypcore/module.h>
+#include <polypcore/llist.h>
+#include <polypcore/source.h>
+#include <polypcore/source-output.h>
+#include <polypcore/memblockq.h>
+#include <polypcore/log.h>
+#include <polypcore/util.h>
+#include <polypcore/xmalloc.h>
+#include <polypcore/modargs.h>
+#include <polypcore/namereg.h>
+
+#include "module-rtp-monitor-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")
+PA_MODULE_VERSION(PACKAGE_VERSION)
+PA_MODULE_USAGE(
+ "source=<name for the source> "
+ "format=<sample format> "
+ "channels=<number of channels> "
+ "rate=<sample rate> "
+ "destinaton=<destination IP address> "
+ "port=<port number> "
+ "mtu=<maximum transfer unit> "
+)
+
+#define DEFAULT_PORT 5666
+#define SAP_PORT 9875
+#define DEFAULT_DESTINATION "224.0.0.252"
+#define MEMBLOCKQ_MAXLENGTH (1024*170)
+#define DEFAULT_MTU 1024
+#define SAP_INTERVAL 5000000
+
+static const char* const valid_modargs[] = {
+ "source",
+ "format",
+ "channels",
+ "rate",
+ "destination",
+ "port",
+ 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(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_log("SAP update");
+ 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;
+
+ 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;
+ }
+
+ 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);
+
+ payload = pa_rtp_payload_type(&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;
+ }
+
+ 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 ((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", strerror(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", strerror(errno));
+ goto fail;
+ }
+
+ if ((sap_fd = socket(af, SOCK_DGRAM, 0)) < 0) {
+ pa_log(__FILE__": socket() failed: %s", strerror(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", strerror(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);
+
+ 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,
+ "Polypaudio RTP Stream", port, payload, &ss);
+
+ pa_rtp_context_init_send(&u->rtp_context, fd, 0, payload);
+ pa_sap_context_init_send(&u->sap_context, sap_fd, p);
+
+ pa_log_info("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("SDP-Data:\n%s\nEOF", 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, 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);
+}
generated by cgit (git 2.34.1) at 2024-11-16 09:09:35 +0000