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-rw-r--r--src/modules/rtp/module-rtp-send.c547
1 files changed, 547 insertions, 0 deletions
diff --git a/src/modules/rtp/module-rtp-send.c b/src/modules/rtp/module-rtp-send.c
new file mode 100644
index 0000000..5a4c6fc
--- /dev/null
+++ b/src/modules/rtp/module-rtp-send.c
@@ -0,0 +1,547 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2006 Lennart Poettering
+
+ 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 2.1 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, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <pulse/rtclock.h>
+#include <pulse/timeval.h>
+#include <pulse/util.h>
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/core-error.h>
+#include <pulsecore/module.h>
+#include <pulsecore/source.h>
+#include <pulsecore/source-output.h>
+#include <pulsecore/memblockq.h>
+#include <pulsecore/log.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/namereg.h>
+#include <pulsecore/sample-util.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/socket-util.h>
+#include <pulsecore/arpa-inet.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_LOAD_ONCE(false);
+PA_MODULE_USAGE(
+ "source=<name of the source> "
+ "format=<sample format> "
+ "channels=<number of channels> "
+ "rate=<sample rate> "
+ "destination_ip=<destination IP address> "
+ "source_ip=<source IP address> "
+ "port=<port number> "
+ "mtu=<maximum transfer unit> "
+ "loop=<loopback to local host?> "
+ "ttl=<ttl value> "
+ "inhibit_auto_suspend=<always|never|only_with_non_monitor_sources>"
+ "stream_name=<name of the stream>"
+);
+
+#define DEFAULT_PORT 46000
+#define DEFAULT_TTL 1
+#define SAP_PORT 9875
+#define DEFAULT_SOURCE_IP "0.0.0.0"
+#define DEFAULT_DESTINATION_IP "224.0.0.56"
+#define MEMBLOCKQ_MAXLENGTH (1024*170)
+#define DEFAULT_MTU 1280
+#define SAP_INTERVAL (5*PA_USEC_PER_SEC)
+
+static const char* const valid_modargs[] = {
+ "source",
+ "format",
+ "channels",
+ "rate",
+ "destination", /* Compatbility */
+ "destination_ip",
+ "source_ip",
+ "port",
+ "mtu" ,
+ "loop",
+ "ttl",
+ "inhibit_auto_suspend",
+ "stream_name",
+ NULL
+};
+
+enum inhibit_auto_suspend {
+ INHIBIT_AUTO_SUSPEND_ALWAYS,
+ INHIBIT_AUTO_SUSPEND_NEVER,
+ INHIBIT_AUTO_SUSPEND_ONLY_WITH_NON_MONITOR_SOURCES
+};
+
+struct userdata {
+ pa_module *module;
+
+ pa_source_output *source_output;
+ pa_memblockq *memblockq;
+
+ pa_rtp_context *rtp_context;
+ pa_sap_context sap_context;
+
+ pa_time_event *sap_event;
+
+ enum inhibit_auto_suspend inhibit_auto_suspend;
+};
+
+/* Called from I/O thread context */
+static int source_output_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
+ struct userdata *u;
+ pa_assert_se(u = PA_SOURCE_OUTPUT(o)->userdata);
+
+ switch (code) {
+ case PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY:
+ *((pa_usec_t*) data) = pa_bytes_to_usec(pa_memblockq_get_length(u->memblockq), &u->source_output->sample_spec);
+
+ /* Fall through, the default handler will add in the extra
+ * latency added by the resampler */
+ break;
+ }
+
+ return pa_source_output_process_msg(o, code, data, offset, chunk);
+}
+
+/* Called from I/O thread context */
+static void source_output_push_cb(pa_source_output *o, const pa_memchunk *chunk) {
+ struct userdata *u;
+ pa_source_output_assert_ref(o);
+ pa_assert_se(u = o->userdata);
+
+ if (pa_memblockq_push(u->memblockq, chunk) < 0) {
+ pa_log_warn("Failed to push chunk into memblockq.");
+ return;
+ }
+
+ pa_rtp_send(u->rtp_context, u->memblockq);
+}
+
+static pa_source_output_flags_t get_dont_inhibit_auto_suspend_flag(pa_source *source,
+ enum inhibit_auto_suspend inhibit_auto_suspend) {
+ pa_assert(source);
+
+ switch (inhibit_auto_suspend) {
+ case INHIBIT_AUTO_SUSPEND_ALWAYS:
+ return 0;
+
+ case INHIBIT_AUTO_SUSPEND_NEVER:
+ return PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND;
+
+ case INHIBIT_AUTO_SUSPEND_ONLY_WITH_NON_MONITOR_SOURCES:
+ return source->monitor_of ? PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND : 0;
+ }
+
+ pa_assert_not_reached();
+}
+
+/* Called from the main thread. */
+static void source_output_moving_cb(pa_source_output *o, pa_source *dest) {
+ struct userdata *u;
+
+ pa_assert(o);
+
+ u = o->userdata;
+
+ if (!dest)
+ return;
+
+ o->flags &= ~PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND;
+ o->flags |= get_dont_inhibit_auto_suspend_flag(dest, u->inhibit_auto_suspend);
+}
+
+/* Called from main context */
+static void source_output_kill_cb(pa_source_output* o) {
+ struct userdata *u;
+ pa_source_output_assert_ref(o);
+ pa_assert_se(u = o->userdata);
+
+ pa_module_unload_request(u->module, true);
+
+ pa_source_output_unlink(u->source_output);
+ pa_source_output_unref(u->source_output);
+ u->source_output = NULL;
+}
+
+static void sap_event_cb(pa_mainloop_api *m, pa_time_event *t, const struct timeval *tv, void *userdata) {
+ struct userdata *u = userdata;
+
+ pa_assert(m);
+ pa_assert(t);
+ pa_assert(u);
+
+ pa_sap_send(&u->sap_context, 0);
+
+ pa_core_rttime_restart(u->module->core, t, pa_rtclock_now() + SAP_INTERVAL);
+}
+
+int pa__init(pa_module*m) {
+ struct userdata *u;
+ pa_modargs *ma = NULL;
+ const char *dst_addr;
+ const char *src_addr;
+ uint32_t port = DEFAULT_PORT, mtu;
+ uint32_t ttl = DEFAULT_TTL;
+ sa_family_t af;
+ int fd = -1, sap_fd = -1;
+ pa_source *s;
+ pa_sample_spec ss;
+ pa_channel_map cm;
+ struct sockaddr_in dst_sa4, dst_sap_sa4, src_sa4, src_sap_sa4;
+#ifdef HAVE_IPV6
+ struct sockaddr_in6 dst_sa6, dst_sap_sa6, src_sa6, src_sap_sa6;
+#endif
+ struct sockaddr_storage sa_dst;
+ pa_source_output *o = NULL;
+ uint8_t payload;
+ char *p;
+ int r, j;
+ socklen_t k;
+ char hn[128], *n;
+ bool loop = false;
+ enum inhibit_auto_suspend inhibit_auto_suspend = INHIBIT_AUTO_SUSPEND_ONLY_WITH_NON_MONITOR_SOURCES;
+ const char *inhibit_auto_suspend_str;
+ pa_source_output_new_data data;
+
+ pa_assert(m);
+
+ if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+ pa_log("Failed to parse module arguments");
+ goto fail;
+ }
+
+ if (!(s = pa_namereg_get(m->core, pa_modargs_get_value(ma, "source", NULL), PA_NAMEREG_SOURCE))) {
+ pa_log("Source does not exist.");
+ goto fail;
+ }
+
+ if (pa_modargs_get_value_boolean(ma, "loop", &loop) < 0) {
+ pa_log("Failed to parse \"loop\" parameter.");
+ goto fail;
+ }
+
+ if ((inhibit_auto_suspend_str = pa_modargs_get_value(ma, "inhibit_auto_suspend", NULL))) {
+ if (pa_streq(inhibit_auto_suspend_str, "always"))
+ inhibit_auto_suspend = INHIBIT_AUTO_SUSPEND_ALWAYS;
+ else if (pa_streq(inhibit_auto_suspend_str, "never"))
+ inhibit_auto_suspend = INHIBIT_AUTO_SUSPEND_NEVER;
+ else if (pa_streq(inhibit_auto_suspend_str, "only_with_non_monitor_sources"))
+ inhibit_auto_suspend = INHIBIT_AUTO_SUSPEND_ONLY_WITH_NON_MONITOR_SOURCES;
+ else {
+ pa_log("Failed to parse the \"inhibit_auto_suspend\" 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("Failed to parse sample specification");
+ goto fail;
+ }
+
+ if (!pa_rtp_sample_spec_valid(&ss)) {
+ pa_log("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 = (uint32_t) pa_frame_align(DEFAULT_MTU, &ss);
+
+ if (pa_modargs_get_value_u32(ma, "mtu", &mtu) < 0 || mtu < 1 || mtu % pa_frame_size(&ss) != 0) {
+ pa_log("Invalid MTU.");
+ goto fail;
+ }
+
+ port = DEFAULT_PORT + ((uint32_t) (rand() % 512) << 1);
+ if (pa_modargs_get_value_u32(ma, "port", &port) < 0 || port < 1 || port > 0xFFFF) {
+ pa_log("port= expects a numerical argument between 1 and 65535.");
+ goto fail;
+ }
+
+ if (port & 1)
+ pa_log_warn("Port number not even as suggested in RFC3550!");
+
+ if (pa_modargs_get_value_u32(ma, "ttl", &ttl) < 0 || ttl < 1 || ttl > 0xFF) {
+ pa_log("ttl= expects a numerical argument between 1 and 255.");
+ goto fail;
+ }
+
+ src_addr = pa_modargs_get_value(ma, "source_ip", DEFAULT_SOURCE_IP);
+
+ if (inet_pton(AF_INET, src_addr, &src_sa4.sin_addr) > 0) {
+ src_sa4.sin_family = af = AF_INET;
+ src_sa4.sin_port = htons(0);
+ memset(&src_sa4.sin_zero, 0, sizeof(src_sa4.sin_zero));
+ src_sap_sa4 = src_sa4;
+#ifdef HAVE_IPV6
+ } else if (inet_pton(AF_INET6, src_addr, &src_sa6.sin6_addr) > 0) {
+ src_sa6.sin6_family = af = AF_INET6;
+ src_sa6.sin6_port = htons(0);
+ src_sa6.sin6_flowinfo = 0;
+ src_sa6.sin6_scope_id = 0;
+ src_sap_sa6 = src_sa6;
+#endif
+ } else {
+ pa_log("Invalid source address '%s'", src_addr);
+ goto fail;
+ }
+
+ dst_addr = pa_modargs_get_value(ma, "destination", NULL);
+ if (dst_addr == NULL)
+ dst_addr = pa_modargs_get_value(ma, "destination_ip", DEFAULT_DESTINATION_IP);
+
+ if (inet_pton(AF_INET, dst_addr, &dst_sa4.sin_addr) > 0) {
+ dst_sa4.sin_family = af = AF_INET;
+ dst_sa4.sin_port = htons((uint16_t) port);
+ memset(&dst_sa4.sin_zero, 0, sizeof(dst_sa4.sin_zero));
+ dst_sap_sa4 = dst_sa4;
+ dst_sap_sa4.sin_port = htons(SAP_PORT);
+#ifdef HAVE_IPV6
+ } else if (inet_pton(AF_INET6, dst_addr, &dst_sa6.sin6_addr) > 0) {
+ dst_sa6.sin6_family = af = AF_INET6;
+ dst_sa6.sin6_port = htons((uint16_t) port);
+ dst_sa6.sin6_flowinfo = 0;
+ dst_sa6.sin6_scope_id = 0;
+ dst_sap_sa6 = dst_sa6;
+ dst_sap_sa6.sin6_port = htons(SAP_PORT);
+#endif
+ } else {
+ pa_log("Invalid destination '%s'", dst_addr);
+ goto fail;
+ }
+
+ if ((fd = pa_socket_cloexec(af, SOCK_DGRAM, 0)) < 0) {
+ pa_log("socket() failed: %s", pa_cstrerror(errno));
+ goto fail;
+ }
+
+ if (af == AF_INET && bind(fd, (struct sockaddr*) &src_sa4, sizeof(src_sa4)) < 0) {
+ pa_log("bind() failed: %s", pa_cstrerror(errno));
+ goto fail;
+#ifdef HAVE_IPV6
+ } else if (af == AF_INET6 && bind(fd, (struct sockaddr*) &src_sa6, sizeof(src_sa6)) < 0) {
+ pa_log("bind() failed: %s", pa_cstrerror(errno));
+ goto fail;
+#endif
+ }
+
+ if (af == AF_INET && connect(fd, (struct sockaddr*) &dst_sa4, sizeof(dst_sa4)) < 0) {
+ pa_log("connect() failed: %s", pa_cstrerror(errno));
+ goto fail;
+#ifdef HAVE_IPV6
+ } else if (af == AF_INET6 && connect(fd, (struct sockaddr*) &dst_sa6, sizeof(dst_sa6)) < 0) {
+ pa_log("connect() failed: %s", pa_cstrerror(errno));
+ goto fail;
+#endif
+ }
+
+ if ((sap_fd = pa_socket_cloexec(af, SOCK_DGRAM, 0)) < 0) {
+ pa_log("socket() failed: %s", pa_cstrerror(errno));
+ goto fail;
+ }
+
+ if (af == AF_INET && bind(sap_fd, (struct sockaddr*) &src_sap_sa4, sizeof(src_sap_sa4)) < 0) {
+ pa_log("bind() failed: %s", pa_cstrerror(errno));
+ goto fail;
+#ifdef HAVE_IPV6
+ } else if (af == AF_INET6 && bind(sap_fd, (struct sockaddr*) &src_sap_sa6, sizeof(src_sap_sa6)) < 0) {
+ pa_log("bind() failed: %s", pa_cstrerror(errno));
+ goto fail;
+#endif
+ }
+
+ if (af == AF_INET && connect(sap_fd, (struct sockaddr*) &dst_sap_sa4, sizeof(dst_sap_sa4)) < 0) {
+ pa_log("connect() failed: %s", pa_cstrerror(errno));
+ goto fail;
+#ifdef HAVE_IPV6
+ } else if (af == AF_INET6 && connect(sap_fd, (struct sockaddr*) &dst_sap_sa6, sizeof(dst_sap_sa6)) < 0) {
+ pa_log("connect() failed: %s", pa_cstrerror(errno));
+ goto fail;
+#endif
+ }
+
+ j = loop;
+ if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &j, sizeof(j)) < 0 ||
+ setsockopt(sap_fd, IPPROTO_IP, IP_MULTICAST_LOOP, &j, sizeof(j)) < 0) {
+ pa_log("IP_MULTICAST_LOOP failed: %s", pa_cstrerror(errno));
+ goto fail;
+ }
+
+ if (ttl != DEFAULT_TTL) {
+ int _ttl = (int) ttl;
+
+ if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL, &_ttl, sizeof(_ttl)) < 0) {
+ pa_log("IP_MULTICAST_TTL failed: %s", pa_cstrerror(errno));
+ goto fail;
+ }
+
+ if (setsockopt(sap_fd, IPPROTO_IP, IP_MULTICAST_TTL, &_ttl, sizeof(_ttl)) < 0) {
+ pa_log("IP_MULTICAST_TTL (sap) failed: %s", pa_cstrerror(errno));
+ goto fail;
+ }
+ }
+
+ /* If the socket queue is full, let's drop packets */
+ pa_make_fd_nonblock(fd);
+ pa_make_udp_socket_low_delay(fd);
+
+ pa_source_output_new_data_init(&data);
+ pa_proplist_sets(data.proplist, PA_PROP_MEDIA_NAME, "RTP Monitor Stream");
+ pa_proplist_sets(data.proplist, "rtp.source", src_addr);
+ pa_proplist_sets(data.proplist, "rtp.destination", dst_addr);
+ pa_proplist_setf(data.proplist, "rtp.mtu", "%lu", (unsigned long) mtu);
+ pa_proplist_setf(data.proplist, "rtp.port", "%lu", (unsigned long) port);
+ pa_proplist_setf(data.proplist, "rtp.ttl", "%lu", (unsigned long) ttl);
+ data.driver = __FILE__;
+ data.module = m;
+ pa_source_output_new_data_set_source(&data, s, false, true);
+ pa_source_output_new_data_set_sample_spec(&data, &ss);
+ pa_source_output_new_data_set_channel_map(&data, &cm);
+ data.flags |= get_dont_inhibit_auto_suspend_flag(s, inhibit_auto_suspend);
+
+ pa_source_output_new(&o, m->core, &data);
+ pa_source_output_new_data_done(&data);
+
+ if (!o) {
+ pa_log("failed to create source output.");
+ goto fail;
+ }
+
+ o->parent.process_msg = source_output_process_msg;
+ o->push = source_output_push_cb;
+ o->moving = source_output_moving_cb;
+ o->kill = source_output_kill_cb;
+
+ pa_log_info("Configured source latency of %llu ms.",
+ (unsigned long long) pa_source_output_set_requested_latency(o, pa_bytes_to_usec(mtu, &o->sample_spec)) / PA_USEC_PER_MSEC);
+
+ m->userdata = o->userdata = u = pa_xnew(struct userdata, 1);
+ u->module = m;
+ u->source_output = o;
+
+ u->memblockq = pa_memblockq_new(
+ "module-rtp-send memblockq",
+ 0,
+ MEMBLOCKQ_MAXLENGTH,
+ MEMBLOCKQ_MAXLENGTH,
+ &ss,
+ 1,
+ 0,
+ 0,
+ NULL);
+
+ k = sizeof(sa_dst);
+ pa_assert_se((r = getsockname(fd, (struct sockaddr*) &sa_dst, &k)) >= 0);
+
+ n = pa_xstrdup(pa_modargs_get_value(ma, "stream_name", NULL));
+ if (n == NULL)
+ n = pa_sprintf_malloc("PulseAudio RTP Stream on %s", pa_get_fqdn(hn, sizeof(hn)));
+
+ if (af == AF_INET) {
+ p = pa_sdp_build(af,
+ (void*) &((struct sockaddr_in*) &sa_dst)->sin_addr,
+ (void*) &dst_sa4.sin_addr,
+ n, (uint16_t) port, payload, &ss);
+#ifdef HAVE_IPV6
+ } else {
+ p = pa_sdp_build(af,
+ (void*) &((struct sockaddr_in6*) &sa_dst)->sin6_addr,
+ (void*) &dst_sa6.sin6_addr,
+ n, (uint16_t) port, payload, &ss);
+#endif
+ }
+
+ pa_xfree(n);
+
+ if (!(u->rtp_context = pa_rtp_context_new_send(fd, payload, mtu, &ss)))
+ goto fail;
+ pa_sap_context_init_send(&u->sap_context, sap_fd, p);
+
+ pa_log_info("RTP stream initialized with mtu %u on %s:%u from %s ttl=%u, payload=%u",
+ mtu, dst_addr, port, src_addr, ttl, payload);
+ pa_log_info("SDP-Data:\n%s\nEOF", p);
+
+ pa_sap_send(&u->sap_context, 0);
+
+ u->sap_event = pa_core_rttime_new(m->core, pa_rtclock_now() + SAP_INTERVAL, sap_event_cb, u);
+ u->inhibit_auto_suspend = inhibit_auto_suspend;
+
+ pa_source_output_put(u->source_output);
+
+ pa_modargs_free(ma);
+
+ return 0;
+
+fail:
+ if (ma)
+ pa_modargs_free(ma);
+
+ if (fd >= 0)
+ pa_close(fd);
+
+ if (sap_fd >= 0)
+ pa_close(sap_fd);
+
+ return -1;
+}
+
+void pa__done(pa_module*m) {
+ struct userdata *u;
+ pa_assert(m);
+
+ if (!(u = m->userdata))
+ return;
+
+ if (u->sap_event)
+ m->core->mainloop->time_free(u->sap_event);
+
+ if (u->source_output) {
+ pa_source_output_unlink(u->source_output);
+ pa_source_output_unref(u->source_output);
+ }
+
+ pa_rtp_context_free(u->rtp_context);
+
+ pa_sap_send(&u->sap_context, 1);
+ pa_sap_context_destroy(&u->sap_context);
+
+ if (u->memblockq)
+ pa_memblockq_free(u->memblockq);
+
+ pa_xfree(u);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 08:25:31 +0000