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* add RTP/SAP/SDP reciever module

Browse source 
* use server cookie as RTP SSRC
* enable SVN keywords
* add new option "loop" for RTP sender module


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@716 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2006-04-16 00:16:53 +00:00
parent 1fec416db7
commit f1ddf05236
9 changed files with 1012 additions and 53 deletions
Download patch file Download diff file Expand all files Collapse all files

13
src/Makefile.am
View file

@ -722,7 +722,8 @@ modlib_LTLIBRARIES += \
module-esound-sink.la \
module-http-protocol-tcp.la \
module-detect.la \
module-rtp-monitor.la
module-rtp-monitor.la \
module-rtp-recv.la
if HAVE_AF_UNIX
modlib_LTLIBRARIES += \
@ -834,7 +835,8 @@ SYMDEF_FILES = \
modules/module-solaris-symdef.h \
modules/module-waveout-symdef.h \
modules/module-detect-symdef.h \
modules/rtp/module-rtp-monitor-symdef.h
modules/rtp/module-rtp-monitor-symdef.h \
modules/rtp/module-rtp-recv-symdef.h
EXTRA_DIST += $(SYMDEF_FILES)
BUILT_SOURCES += $(SYMDEF_FILES)
@ -1049,12 +1051,17 @@ module_detect_la_LDFLAGS = -module -avoid-version
module_detect_la_LIBADD = $(AM_LIBADD) libpolypcore.la
module_detect_la_CFLAGS = $(AM_CFLAGS)
# Hardware autodetection module
# RTP modules
module_rtp_monitor_la_SOURCES = modules/rtp/module-rtp-monitor.c
module_rtp_monitor_la_LDFLAGS = -module -avoid-version
module_rtp_monitor_la_LIBADD = $(AM_LIBADD) libpolypcore.la
module_rtp_monitor_la_CFLAGS = $(AM_CFLAGS)
module_rtp_recv_la_SOURCES = modules/rtp/module-rtp-recv.c
module_rtp_recv_la_LDFLAGS = -module -avoid-version
module_rtp_recv_la_LIBADD = $(AM_LIBADD) libpolypcore.la
module_rtp_recv_la_CFLAGS = $(AM_CFLAGS)
###################################
# Some minor stuff #
###################################

42
src/modules/rtp/module-rtp-monitor.c
View file

@ -1,3 +1,4 @@
/* $Id */
/***
This file is part of polypaudio.
@ -49,16 +50,17 @@
#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_DESCRIPTION("Read data from source and send it to the network via RTP/SAP/SDP")
PA_MODULE_VERSION(PACKAGE_VERSION)
PA_MODULE_USAGE(
"source=<name for the source> "
"source=<name of the source> "
"format=<sample format> "
"channels=<number of channels> "
"rate=<sample rate> "
"destinaton=<destination IP address> "
"port=<port number> "
"mtu=<maximum transfer unit> "
"loop=<loopback to local host?>"
)
#define DEFAULT_PORT 5004
@ -75,6 +77,7 @@ static const char* const valid_modargs[] = {
"rate",
"destination",
"port",
"loop",
NULL
};
@ -125,7 +128,7 @@ static pa_usec_t source_output_get_latency (pa_source_output *o) {
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) {
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;
@ -159,6 +162,8 @@ int pa__init(pa_core *c, pa_module*m) {
int r;
socklen_t k;
struct timeval tv;
char hn[128], *n;
int loop = 0;
assert(c);
assert(m);
@ -173,6 +178,11 @@ int pa__init(pa_core *c, pa_module*m) {
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;
@ -189,7 +199,7 @@ int pa__init(pa_core *c, pa_module*m) {
if (ss.channels != cm.channels)
pa_channel_map_init_auto(&cm, ss.channels);
payload = pa_rtp_payload_type(&ss);
payload = pa_rtp_payload_from_sample_spec(&ss);
mtu = (DEFAULT_MTU/pa_frame_size(&ss))*pa_frame_size(&ss);
@ -203,7 +213,8 @@ int pa__init(pa_core *c, pa_module*m) {
goto fail;
}
if ((dest = pa_modargs_get_value(ma, "destination", DEFAULT_DESTINATION))) {
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);
@ -218,7 +229,6 @@ int pa__init(pa_core *c, pa_module*m) {
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));
@ -240,6 +250,12 @@ int pa__init(pa_core *c, pa_module*m) {
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", 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;
@ -274,22 +290,26 @@ int pa__init(pa_core *c, pa_module*m) {
r = getsockname(fd, (struct sockaddr*) &sa_dst, &k);
assert(r >= 0);
n = pa_sprintf_malloc("Polypaudio 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,
"Polypaudio RTP Stream", port, payload, &ss);
n, port, payload, &ss);
pa_rtp_context_init_send(&u->rtp_context, fd, 0, payload, pa_frame_size(&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("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_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, u);
u->sap_event = c->mainloop->time_new(c->mainloop, &tv, sap_event_cb, u);
pa_modargs_free(ma);

469
src/modules/rtp/module-rtp-recv.c Normal file
View file

@ -0,0 +1,469 @@
/***
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/sink.h>
#include <polypcore/sink-input.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-recv-symdef.h"
#include "rtp.h"
#include "sdp.h"
#include "sap.h"
PA_MODULE_AUTHOR("Lennart Poettering")
PA_MODULE_DESCRIPTION("Recieve data from a network via RTP/SAP/SDP")
PA_MODULE_VERSION(PACKAGE_VERSION)
PA_MODULE_USAGE(
"sink=<name of the sink> "
"sap_address=<multicast address to listen on> "
)
#define SAP_PORT 9875
#define DEFAULT_SAP_ADDRESS "224.0.1.2"
#define MEMBLOCKQ_MAXLENGTH (1024*170)
#define MAX_SESSIONS 16
#define DEATH_TIMEOUT 20000000
static const char* const valid_modargs[] = {
"sink",
"sap_address",
NULL
};
struct session {
struct userdata *userdata;
pa_sink_input *sink_input;
pa_memblockq *memblockq;
pa_time_event *death_event;
int first_packet;
uint32_t ssrc;
uint32_t offset;
struct pa_sdp_info sdp_info;
pa_rtp_context rtp_context;
pa_io_event* rtp_event;
};
struct userdata {
pa_module *module;
pa_core *core;
pa_sap_context sap_context;
pa_io_event* sap_event;
pa_hashmap *by_origin;
char *sink_name;
};
static void session_free(struct session *s, int from_hash);
static int sink_input_peek(pa_sink_input *i, pa_memchunk *chunk) {
struct session *s;
assert(i);
s = i->userdata;
return pa_memblockq_peek(s->memblockq, chunk);
}
static void sink_input_drop(pa_sink_input *i, const pa_memchunk *chunk, size_t length) {
struct session *s;
assert(i);
s = i->userdata;
pa_memblockq_drop(s->memblockq, chunk, length);
}
static void sink_input_kill(pa_sink_input* i) {
struct session *s;
assert(i);
s = i->userdata;
session_free(s, 1);
}
static pa_usec_t sink_input_get_latency(pa_sink_input *i) {
struct session *s;
assert(i);
s = i->userdata;
return pa_bytes_to_usec(pa_memblockq_get_length(s->memblockq), &i->sample_spec);
}
static void rtp_event_cb(pa_mainloop_api *m, pa_io_event *e, int fd, pa_io_event_flags_t flags, void *userdata) {
struct session *s = userdata;
pa_memchunk chunk;
int64_t k, j, delta;
struct timeval tv;
assert(m);
assert(e);
assert(s);
assert(fd == s->rtp_context.fd);
assert(flags == PA_IO_EVENT_INPUT);
if (pa_rtp_recv(&s->rtp_context, &chunk, s->userdata->core->memblock_stat) < 0)
return;
if (s->sdp_info.payload != s->rtp_context.payload) {
pa_memblock_unref(chunk.memblock);
return;
}
if (!s->first_packet) {
s->first_packet = 1;
s->ssrc = s->rtp_context.ssrc;
s->offset = s->rtp_context.timestamp;
} else {
if (s->ssrc != s->rtp_context.ssrc) {
pa_memblock_unref(chunk.memblock);
return;
}
}
/* Check wheter there was a timestamp overflow */
k = (int64_t) s->rtp_context.timestamp - (int64_t) s->offset;
j = (int64_t) 0x100000000 - (int64_t) s->offset + (int64_t) s->rtp_context.timestamp;
if ((k < 0 ? -k : k) < (j < 0 ? -j : j))
delta = k;
else
delta = j;
pa_memblockq_seek(s->memblockq, delta * s->rtp_context.frame_size, PA_SEEK_RELATIVE);
pa_memblockq_push(s->memblockq, &chunk);
/* The next timestamp we expect */
s->offset = s->rtp_context.timestamp + (chunk.length / s->rtp_context.frame_size);
pa_memblock_unref(chunk.memblock);
/* Reset death timer */
pa_gettimeofday(&tv);
pa_timeval_add(&tv, DEATH_TIMEOUT);
m->time_restart(s->death_event, &tv);
}
static void death_event_cb(pa_mainloop_api *m, pa_time_event *t, const struct timeval *tv, void *userdata) {
struct session *s = userdata;
assert(m);
assert(t);
assert(tv);
assert(s);
session_free(s, 1);
}
static int mcast_socket(const struct sockaddr* sa, socklen_t salen) {
int af, fd = -1, r, one;
af = sa->sa_family;
if ((fd = socket(af, SOCK_DGRAM, 0)) < 0) {
pa_log(__FILE__": Failed to create socket: %s", strerror(errno));
goto fail;
}
one = 1;
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0) {
pa_log(__FILE__": SO_REUSEADDR failed: %s", strerror(errno));
goto fail;
}
if (af == AF_INET) {
struct ip_mreq mr4;
memset(&mr4, 0, sizeof(mr4));
mr4.imr_multiaddr = ((const struct sockaddr_in*) sa)->sin_addr;
r = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mr4, sizeof(mr4));
} else {
struct ipv6_mreq mr6;
memset(&mr6, 0, sizeof(mr6));
mr6.ipv6mr_multiaddr = ((const struct sockaddr_in6*) sa)->sin6_addr;
r = setsockopt(fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mr6, sizeof(mr6));
}
if (r < 0) {
pa_log_info(__FILE__": Joining mcast group failed: %s", strerror(errno));
goto fail;
}
if (bind(fd, sa, salen) < 0) {
pa_log(__FILE__": bind() failed: %s", strerror(errno));
goto fail;
}
return fd;
fail:
if (fd >= 0)
close(fd);
return -1;
}
static struct session *session_new(struct userdata *u, const pa_sdp_info *sdp_info) {
struct session *s = NULL;
struct timeval tv;
char *c;
pa_sink *sink;
int fd = -1;
if (!(sink = pa_namereg_get(u->core, u->sink_name, PA_NAMEREG_SINK, 1))) {
pa_log(__FILE__": sink does not exist.");
goto fail;
}
s = pa_xnew0(struct session, 1);
s->userdata = u;
s->first_packet = 0;
s->sdp_info = *sdp_info;
if ((fd = mcast_socket((const struct sockaddr*) &sdp_info->sa, sdp_info->salen)) < 0)
goto fail;
c = pa_sprintf_malloc("RTP Stream%s%s%s",
sdp_info->session_name ? " (" : "",
sdp_info->session_name ? sdp_info->session_name : "",
sdp_info->session_name ? ")" : "");
s->sink_input = pa_sink_input_new(sink, __FILE__, c, &sdp_info->sample_spec, NULL, 0, PA_RESAMPLER_INVALID);
pa_xfree(c);
if (!s->sink_input) {
pa_log(__FILE__": failed to create sink input.");
goto fail;
}
s->sink_input->userdata = s;
s->sink_input->owner = u->module;
s->sink_input->peek = sink_input_peek;
s->sink_input->drop = sink_input_drop;
s->sink_input->kill = sink_input_kill;
s->sink_input->get_latency = sink_input_get_latency;
s->memblockq = pa_memblockq_new(
0,
MEMBLOCKQ_MAXLENGTH,
MEMBLOCKQ_MAXLENGTH,
pa_frame_size(&s->sink_input->sample_spec),
1,
0,
NULL,
u->core->memblock_stat);
s->rtp_event = u->core->mainloop->io_new(u->core->mainloop, fd, PA_IO_EVENT_INPUT, rtp_event_cb, s);
pa_gettimeofday(&tv);
pa_timeval_add(&tv, DEATH_TIMEOUT);
s->death_event = u->core->mainloop->time_new(u->core->mainloop, &tv, death_event_cb, s);
pa_hashmap_put(s->userdata->by_origin, s->sdp_info.origin, s);
pa_rtp_context_init_recv(&s->rtp_context, fd, pa_frame_size(&s->sdp_info.sample_spec));
pa_log_info(__FILE__": Found new session '%s'", s->sdp_info.session_name);
return s;
fail:
if (s) {
if (fd >= 0)
close(fd);
pa_xfree(s);
}
return NULL;
}
static void session_free(struct session *s, int from_hash) {
assert(s);
pa_log_info(__FILE__": Freeing session '%s'", s->sdp_info.session_name);
s->userdata->core->mainloop->time_free(s->death_event);
s->userdata->core->mainloop->io_free(s->rtp_event);
if (from_hash)
pa_hashmap_remove(s->userdata->by_origin, s->sdp_info.origin);
pa_sink_input_disconnect(s->sink_input);
pa_sink_input_unref(s->sink_input);
pa_memblockq_free(s->memblockq);
pa_sdp_info_destroy(&s->sdp_info);
pa_rtp_context_destroy(&s->rtp_context);
pa_xfree(s);
}
static void sap_event_cb(pa_mainloop_api *m, pa_io_event *e, int fd, pa_io_event_flags_t flags, void *userdata) {
struct userdata *u = userdata;
int goodbye;
pa_sdp_info info;
struct session *s;
assert(m);
assert(e);
assert(u);
assert(fd == u->sap_context.fd);
assert(flags == PA_IO_EVENT_INPUT);
if (pa_sap_recv(&u->sap_context, &goodbye) < 0)
return;
if (!pa_sdp_parse(u->sap_context.sdp_data, &info, goodbye))
return;
if (goodbye) {
if ((s = pa_hashmap_get(u->by_origin, info.origin)))
session_free(s, 1);
pa_sdp_info_destroy(&info);
} else {
if (!(s = pa_hashmap_get(u->by_origin, info.origin))) {
if (!(s = session_new(u, &info)))
pa_sdp_info_destroy(&info);
} else {
struct timeval tv;
pa_gettimeofday(&tv);
pa_timeval_add(&tv, DEATH_TIMEOUT);
m->time_restart(s->death_event, &tv);
pa_sdp_info_destroy(&info);
}
}
}
int pa__init(pa_core *c, pa_module*m) {
struct userdata *u;
pa_modargs *ma = NULL;
struct sockaddr_in sa4;
struct sockaddr_in6 sa6;
struct sockaddr *sa;
socklen_t salen;
const char *sap_address;
int fd = -1;
assert(c);
assert(m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log(__FILE__": failed to parse module arguments");
goto fail;
}
sap_address = pa_modargs_get_value(ma, "sap_address", DEFAULT_SAP_ADDRESS);
if (inet_pton(AF_INET6, sap_address, &sa6.sin6_addr) > 0) {
sa6.sin6_family = AF_INET6;
sa6.sin6_port = htons(SAP_PORT);
sa = (struct sockaddr*) &sa6;
salen = sizeof(sa6);
} else if (inet_pton(AF_INET, sap_address, &sa4.sin_addr) > 0) {
sa4.sin_family = AF_INET;
sa4.sin_port = htons(SAP_PORT);
sa = (struct sockaddr*) &sa4;
salen = sizeof(sa4);
} else {
pa_log(__FILE__": invalid SAP address '%s'", sap_address);
goto fail;
}
if ((fd = mcast_socket(sa, salen)) < 0)
goto fail;
u = pa_xnew(struct userdata, 1);
m->userdata = u;
u->module = m;
u->core = c;
u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
u->sap_event = c->mainloop->io_new(c->mainloop, fd, PA_IO_EVENT_INPUT, sap_event_cb, u);
u->by_origin = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
pa_sap_context_init_recv(&u->sap_context, fd);
pa_modargs_free(ma);
return 0;
fail:
if (ma)
pa_modargs_free(ma);
if (fd >= 0)
close(fd);
return -1;
}
static void free_func(void *p, void *userdata) {
session_free(p, 0);
}
void pa__done(pa_core *c, pa_module*m) {
struct userdata *u;
assert(c);
assert(m);
if (!(u = m->userdata))
return;
c->mainloop->io_free(u->sap_event);
pa_sap_context_destroy(&u->sap_context);
pa_hashmap_free(u->by_origin, free_func, NULL);
pa_xfree(u->sink_name);
pa_xfree(u);
}

162
src/modules/rtp/rtp.c
View file

@ -30,6 +30,7 @@
#include <errno.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <polypcore/log.h>
@ -135,27 +136,114 @@ int pa_rtp_send(pa_rtp_context *c, size_t size, pa_memblockq *q) {
return 0;
}
pa_rtp_context* pa_rtp_context_init_recv(pa_rtp_context *c, int fd) {
pa_rtp_context* pa_rtp_context_init_recv(pa_rtp_context *c, int fd, size_t frame_size) {
assert(c);
c->fd = fd;
c->frame_size = frame_size;
return c;
}
int pa_rtp_recv(pa_rtp_context *c, pa_memchunk *chunk) {
int pa_rtp_recv(pa_rtp_context *c, pa_memchunk *chunk, pa_memblock_stat *st) {
int size;
struct msghdr m;
struct iovec iov;
uint32_t header;
int cc;
ssize_t r;
assert(c);
assert(chunk);
chunk->memblock = NULL;
if (ioctl(c->fd, FIONREAD, &size) < 0) {
pa_log(__FILE__": FIONREAD failed: %s", strerror(errno));
goto fail;
}
if (!size)
return 0;
chunk->memblock = pa_memblock_new(size, st);
iov.iov_base = chunk->memblock->data;
iov.iov_len = size;
m.msg_name = NULL;
m.msg_namelen = 0;
m.msg_iov = &iov;
m.msg_iovlen = 1;
m.msg_control = NULL;
m.msg_controllen = 0;
m.msg_flags = 0;
if ((r = recvmsg(c->fd, &m, 0)) != size) {
pa_log(__FILE__": recvmsg() failed: %s", r < 0 ? strerror(errno) : "size mismatch");
goto fail;
}
if (size < 12) {
pa_log(__FILE__": RTP packet too short.");
goto fail;
}
memcpy(&header, chunk->memblock->data, sizeof(uint32_t));
memcpy(&c->timestamp, (uint8_t*) chunk->memblock->data + 4, sizeof(uint32_t));
memcpy(&c->ssrc, (uint8_t*) chunk->memblock->data + 8, sizeof(uint32_t));
header = ntohl(header);
c->timestamp = ntohl(c->timestamp);
c->ssrc = ntohl(c->ssrc);
if ((header >> 30) != 2) {
pa_log(__FILE__": Unsupported RTP version.");
goto fail;
}
if ((header >> 29) & 1) {
pa_log(__FILE__": RTP padding not supported.");
goto fail;
}
if ((header >> 28) & 1) {
pa_log(__FILE__": RTP header extensions not supported.");
goto fail;
}
cc = (header >> 24) & 0xF;
c->payload = (header >> 16) & 127;
c->sequence = header & 0xFFFF;
if (12 + cc*4 > size) {
pa_log(__FILE__": RTP packet too short. (CSRC)");
goto fail;
}
chunk->index = 12 + cc*4;
chunk->length = size - chunk->index;
if (chunk->length % c->frame_size != 0) {
pa_log(__FILE__": Vad RTP packet size.");
goto fail;
}
return 0;
fail:
if (chunk->memblock)
pa_memblock_unref(chunk->memblock);
return -1;
}
uint8_t pa_rtp_payload_type(const pa_sample_spec *ss) {
uint8_t pa_rtp_payload_from_sample_spec(const pa_sample_spec *ss) {
assert(ss);
if (ss->format == PA_SAMPLE_ULAW && ss->rate == 8000 && ss->channels == 1)
return 0;
if (ss->format == PA_SAMPLE_ALAW && ss->rate == 8000 && ss->channels == 1)
return 0;
return 8;
if (ss->format == PA_SAMPLE_S16BE && ss->rate == 44100 && ss->channels == 2)
return 10;
if (ss->format == PA_SAMPLE_S16BE && ss->rate == 44100 && ss->channels == 1)
@ -164,6 +252,41 @@ uint8_t pa_rtp_payload_type(const pa_sample_spec *ss) {
return 127;
}
pa_sample_spec *pa_rtp_sample_spec_from_payload(uint8_t payload, pa_sample_spec *ss) {
assert(ss);
switch (payload) {
case 0:
ss->channels = 1;
ss->format = PA_SAMPLE_ULAW;
ss->rate = 8000;
break;
case 8:
ss->channels = 1;
ss->format = PA_SAMPLE_ALAW;
ss->rate = 8000;
break;
case 10:
ss->channels = 2;
ss->format = PA_SAMPLE_S16BE;
ss->rate = 44100;
break;
case 11:
ss->channels = 1;
ss->format = PA_SAMPLE_S16BE;
ss->rate = 44100;
break;
default:
return NULL;
}
return ss;
}
pa_sample_spec *pa_rtp_sample_spec_fixup(pa_sample_spec * ss) {
assert(ss);
@ -192,3 +315,34 @@ void pa_rtp_context_destroy(pa_rtp_context *c) {
close(c->fd);
}
const char* pa_rtp_format_to_string(pa_sample_format_t f) {
switch (f) {
case PA_SAMPLE_S16BE:
return "L16";
case PA_SAMPLE_U8:
return "L8";
case PA_SAMPLE_ALAW:
return "PCMA";
case PA_SAMPLE_ULAW:
return "PCMU";
default:
return NULL;
}
}
pa_sample_format_t pa_rtp_string_to_format(const char *s) {
assert(s);
if (!(strcmp(s, "L16")))
return PA_SAMPLE_S16BE;
else if (!strcmp(s, "L8"))
return PA_SAMPLE_U8;
else if (!strcmp(s, "PCMA"))
return PA_SAMPLE_ALAW;
else if (!strcmp(s, "PCMU"))
return PA_SAMPLE_ULAW;
else
return PA_SAMPLE_INVALID;
}

17
src/modules/rtp/rtp.h
View file

@ -40,13 +40,18 @@ typedef struct pa_rtp_context {
pa_rtp_context* pa_rtp_context_init_send(pa_rtp_context *c, int fd, uint32_t ssrc, uint8_t payload, size_t frame_size);
int pa_rtp_send(pa_rtp_context *c, size_t size, pa_memblockq *q);
pa_rtp_context* pa_rtp_context_init_recv(pa_rtp_context *c, int fd);
int pa_rtp_recv(pa_rtp_context *c, pa_memchunk *chunk);
uint8_t pa_rtp_payload_type(const pa_sample_spec *ss);
pa_sample_spec* pa_rtp_sample_spec_fixup(pa_sample_spec *ss);
int pa_rtp_sample_spec_valid(const pa_sample_spec *ss);
pa_rtp_context* pa_rtp_context_init_recv(pa_rtp_context *c, int fd, size_t frame_size);
int pa_rtp_recv(pa_rtp_context *c, pa_memchunk *chunk, pa_memblock_stat *st);
void pa_rtp_context_destroy(pa_rtp_context *c);
pa_sample_spec* pa_rtp_sample_spec_fixup(pa_sample_spec *ss);
int pa_rtp_sample_spec_valid(const pa_sample_spec *ss);
uint8_t pa_rtp_payload_from_sample_spec(const pa_sample_spec *ss);
pa_sample_spec *pa_rtp_sample_spec_from_payload(uint8_t payload, pa_sample_spec *ss);
const char* pa_rtp_format_to_string(pa_sample_format_t f);
pa_sample_format_t pa_rtp_string_to_format(const char *s);
#endif

116
src/modules/rtp/sap.c
View file

@ -32,12 +32,16 @@
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <polypcore/util.h>
#include <polypcore/log.h>
#include <polypcore/xmalloc.h>
#include "sap.h"
#include "sdp.h"
#define MIME_TYPE "application/sdp"
pa_sap_context* pa_sap_context_init_send(pa_sap_context *c, int fd, char *sdp_data) {
assert(c);
@ -60,7 +64,6 @@ void pa_sap_context_destroy(pa_sap_context *c) {
int pa_sap_send(pa_sap_context *c, int goodbye) {
uint32_t header;
const char mime[] = "application/sdp";
struct sockaddr_storage sa_buf;
struct sockaddr *sa = (struct sockaddr*) &sa_buf;
socklen_t salen = sizeof(sa_buf);
@ -86,8 +89,8 @@ int pa_sap_send(pa_sap_context *c, int goodbye) {
iov[1].iov_base = sa->sa_family == AF_INET ? (void*) &((struct sockaddr_in*) sa)->sin_addr : (void*) &((struct sockaddr_in6*) sa)->sin6_addr;
iov[1].iov_len = sa->sa_family == AF_INET ? 4 : 16;
iov[2].iov_base = (char*) mime;
iov[2].iov_len = sizeof(mime);
iov[2].iov_base = (char*) MIME_TYPE;
iov[2].iov_len = sizeof(MIME_TYPE);
iov[3].iov_base = c->sdp_data;
iov[3].iov_len = strlen(c->sdp_data);
@ -105,3 +108,110 @@ int pa_sap_send(pa_sap_context *c, int goodbye) {
return k;
}
pa_sap_context* pa_sap_context_init_recv(pa_sap_context *c, int fd) {
assert(c);
assert(fd >= 0);
c->fd = fd;
c->sdp_data = NULL;
return c;
}
int pa_sap_recv(pa_sap_context *c, int *goodbye) {
struct msghdr m;
struct iovec iov;
int size, k;
char *buf = NULL, *e;
uint32_t header;
int six, ac;
ssize_t r;
assert(c);
assert(goodbye);
if (ioctl(c->fd, FIONREAD, &size) < 0) {
pa_log(__FILE__": FIONREAD failed: %s", strerror(errno));
goto fail;
}
if (!size)
return 0;
buf = pa_xnew(char, size+1);
buf[size] = 0;
iov.iov_base = buf;
iov.iov_len = size;
m.msg_name = NULL;
m.msg_namelen = 0;
m.msg_iov = &iov;
m.msg_iovlen = 1;
m.msg_control = NULL;
m.msg_controllen = 0;
m.msg_flags = 0;
if ((r = recvmsg(c->fd, &m, 0)) != size) {
pa_log(__FILE__": recvmsg() failed: %s", r < 0 ? strerror(errno) : "size mismatch");
goto fail;
}
if (size < 4) {
pa_log(__FILE__": SAP packet too short.");
goto fail;
}
memcpy(&header, buf, sizeof(uint32_t));
header = ntohl(header);
if (header >> 29 != 1) {
pa_log(__FILE__": Unsupported SAP version.");
goto fail;
}
if ((header >> 25) & 1) {
pa_log(__FILE__": Encrypted SAP not supported.");
goto fail;
}
if ((header >> 24) & 1) {
pa_log(__FILE__": Compressed SAP not supported.");
goto fail;
}
six = (header >> 28) & 1;
ac = (header >> 16) & 0xFF;
k = 4 + (six ? 16 : 4) + ac*4;
if (size < k) {
pa_log(__FILE__": SAP packet too short (AD).");
goto fail;
}
e = buf + k;
size -= k;
if ((unsigned) size >= sizeof(MIME_TYPE) && !strcmp(e, MIME_TYPE)) {
e += sizeof(MIME_TYPE);
size -= sizeof(MIME_TYPE);
} else if ((unsigned) size < sizeof(PA_SDP_HEADER)-1 || strncmp(e, PA_SDP_HEADER, sizeof(PA_SDP_HEADER)-1)) {
pa_log(__FILE__": Invalid SDP header.");
goto fail;
}
if (c->sdp_data)
pa_xfree(c->sdp_data);
c->sdp_data = pa_xstrndup(e, size);
pa_xfree(buf);
*goodbye = !!((header >> 26) & 1);
return 0;
fail:
pa_xfree(buf);
return -1;
}

3
src/modules/rtp/sap.h
View file

@ -40,4 +40,7 @@ void pa_sap_context_destroy(pa_sap_context *c);
int pa_sap_send(pa_sap_context *c, int goodbye);
pa_sap_context* pa_sap_context_init_recv(pa_sap_context *c, int fd);
int pa_sap_recv(pa_sap_context *c, int *goodbye);
#endif

198
src/modules/rtp/sdp.c
View file

@ -29,21 +29,15 @@
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <string.h>
#include <polypcore/util.h>
#include <polypcore/log.h>
#include <polypcore/xmalloc.h>
#include "sdp.h"
#include "rtp.h"
static const char* map_format(pa_sample_format_t f) {
switch (f) {
case PA_SAMPLE_S16BE: return "L16";
case PA_SAMPLE_U8: return "L8";
case PA_SAMPLE_ALAW: return "PCMA";
case PA_SAMPLE_ULAW: return "PCMU";
default:
return NULL;
}
}
char *pa_sdp_build(int af, const void *src, const void *dst, const char *name, uint16_t port, uint8_t payload, const pa_sample_spec *ss) {
uint32_t ntp;
@ -54,7 +48,7 @@ char *pa_sdp_build(int af, const void *src, const void *dst, const char *name, u
assert(dst);
assert(af == AF_INET || af == AF_INET6);
f = map_format(ss->format);
f = pa_rtp_format_to_string(ss->format);
assert(f);
if (!(u = getenv("USER")))
@ -69,7 +63,7 @@ char *pa_sdp_build(int af, const void *src, const void *dst, const char *name, u
assert(a);
return pa_sprintf_malloc(
"v=0\n"
PA_SDP_HEADER
"o=%s %lu 0 IN %s %s\n"
"s=%s\n"
"c=IN %s %s\n"
@ -85,3 +79,183 @@ char *pa_sdp_build(int af, const void *src, const void *dst, const char *name, u
port, payload,
payload, f, ss->rate, ss->channels);
}
static pa_sample_spec *parse_sdp_sample_spec(pa_sample_spec *ss, char *c) {
unsigned rate, channels;
assert(ss);
assert(c);
if (pa_startswith(c, "L16/")) {
ss->format = PA_SAMPLE_S16BE;
c += 4;
} else if (pa_startswith(c, "L8/")) {
ss->format = PA_SAMPLE_U8;
c += 3;
} else if (pa_startswith(c, "PCMA/")) {
ss->format = PA_SAMPLE_ALAW;
c += 5;
} else if (pa_startswith(c, "PCMU/")) {
ss->format = PA_SAMPLE_ULAW;
c += 5;
} else
return NULL;
if (sscanf(c, "%u/%u", &rate, &channels) == 2) {
ss->rate = rate;
ss->channels = channels;
} else if (sscanf(c, "%u", &rate) == 2) {
ss->rate = rate;
ss->channels = 1;
} else
return NULL;
if (!pa_sample_spec_valid(ss))
return NULL;
return ss;
}
pa_sdp_info *pa_sdp_parse(const char *t, pa_sdp_info *i, int is_goodbye) {
uint16_t port = 0;
int ss_valid = 0;
assert(t);
assert(i);
i->origin = i->session_name = NULL;
i->salen = 0;
i->payload = 255;
if (!pa_startswith(t, PA_SDP_HEADER)) {
pa_log(__FILE__": Failed to parse SDP data: invalid header.");
goto fail;
}
t += sizeof(PA_SDP_HEADER)-1;
while (*t) {
size_t l;
l = strcspn(t, "\n");
if (l <= 2) {
pa_log(__FILE__": Failed to parse SDP data: line too short: >%s<.", t);
goto fail;
}
if (pa_startswith(t, "o="))
i->origin = pa_xstrndup(t+2, l-2);
else if (pa_startswith(t, "s="))
i->session_name = pa_xstrndup(t+2, l-2);
else if (pa_startswith(t, "c=IN IP4 ")) {
char a[64];
size_t k;
k = l-8 > sizeof(a) ? sizeof(a) : l-8;
pa_strlcpy(a, t+9, k);
a[strcspn(a, "/")] = 0;
if (inet_pton(AF_INET, a, &((struct sockaddr_in*) &i->sa)->sin_addr) <= 0) {
pa_log(__FILE__": Failed to parse SDP data: bad address: >%s<.", a);
goto fail;
}
((struct sockaddr_in*) &i->sa)->sin_family = AF_INET;
((struct sockaddr_in*) &i->sa)->sin_port = 0;
i->salen = sizeof(struct sockaddr_in);
} else if (pa_startswith(t, "c=IN IP6 ")) {
char a[64];
size_t k;
k = l-8 > sizeof(a) ? sizeof(a) : l-8;
pa_strlcpy(a, t+9, k);
a[strcspn(a, "/")] = 0;
if (inet_pton(AF_INET6, a, &((struct sockaddr_in6*) &i->sa)->sin6_addr) <= 0) {
pa_log(__FILE__": Failed to parse SDP data: bad address: >%s<.", a);
goto fail;
}
((struct sockaddr_in6*) &i->sa)->sin6_family = AF_INET6;
((struct sockaddr_in6*) &i->sa)->sin6_port = 0;
i->salen = sizeof(struct sockaddr_in6);
} else if (pa_startswith(t, "m=audio ")) {
if (i->payload > 127) {
int _port, _payload;
if (sscanf(t+8, "%i RTP/AVP %i", &_port, &_payload) == 2) {
if (_port <= 0 || _port > 0xFFFF) {
pa_log(__FILE__": Failed to parse SDP data: invalid port %i.", _port);
goto fail;
}
if (_payload < 0 || _payload > 127) {
pa_log(__FILE__": Failed to parse SDP data: invalid payload %i.", _payload);
goto fail;
}
port = (uint16_t) _port;
i->payload = (uint8_t) _payload;
if (pa_rtp_sample_spec_from_payload(i->payload, &i->sample_spec))
ss_valid = 1;
}
}
} else if (pa_startswith(t, "a=rtpmap:")) {
if (i->payload <= 127) {
char c[64];
int _payload;
if (sscanf(t+9, "%i %64c", &_payload, c) == 2) {
if (_payload < 0 || _payload > 127) {
pa_log(__FILE__": Failed to parse SDP data: invalid payload %i.", _payload);
goto fail;
}
if (_payload == i->payload) {
c[strcspn(c, "\n")] = 0;
if (parse_sdp_sample_spec(&i->sample_spec, c))
ss_valid = 1;
}
}
}
}
t += l;
if (*t == '\n')
t++;
}
if (!i->origin || (!is_goodbye && (!i->salen || i->payload > 127 || !ss_valid || port == 0))) {
pa_log(__FILE__": Failed to parse SDP data: missing data.");
goto fail;
}
if (((struct sockaddr*) &i->sa)->sa_family == AF_INET)
((struct sockaddr_in*) &i->sa)->sin_port = htons(port);
else
((struct sockaddr_in6*) &i->sa)->sin6_port = htons(port);
return i;
fail:
pa_xfree(i->origin);
pa_xfree(i->session_name);
return NULL;
}
void pa_sdp_info_destroy(pa_sdp_info *i) {
assert(i);
pa_xfree(i->origin);
pa_xfree(i->session_name);
}

17
src/modules/rtp/sdp.h
View file

@ -28,6 +28,23 @@
#include <polyp/sample.h>
#define PA_SDP_HEADER "v=0\n"
typedef struct pa_sdp_info {
char *origin;
char *session_name;
struct sockaddr_storage sa;
socklen_t salen;
pa_sample_spec sample_spec;
uint8_t payload;
} pa_sdp_info;
char *pa_sdp_build(int af, const void *src, const void *dst, const char *name, uint16_t port, uint8_t payload, const pa_sample_spec *ss);
pa_sdp_info *pa_sdp_parse(const char *t, pa_sdp_info *info, int is_goodbye);
void pa_sdp_info_destroy(pa_sdp_info *i);
#endif