From f1ddf052368ad96cf157297a50ffe52ee8f7ca39 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Sun, 16 Apr 2006 00:16:53 +0000 Subject: * add RTP/SAP/SDP reciever module * 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 --- src/modules/rtp/module-rtp-recv.c | 469 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 469 insertions(+) create mode 100644 src/modules/rtp/module-rtp-recv.c (limited to 'src/modules/rtp/module-rtp-recv.c') diff --git a/src/modules/rtp/module-rtp-recv.c b/src/modules/rtp/module-rtp-recv.c new file mode 100644 index 00000000..1ac057d0 --- /dev/null +++ b/src/modules/rtp/module-rtp-recv.c @@ -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 +#endif + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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= " + "sap_address= " +) + +#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); +} -- cgit