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Diffstat (limited to 'src/modules/module-rtp-sink.c')
| -rw-r--r-- | src/modules/module-rtp-sink.c | 975 |
1 files changed, 975 insertions, 0 deletions
diff --git a/src/modules/module-rtp-sink.c b/src/modules/module-rtp-sink.c new file mode 100644 index 0000000..b0c622d --- /dev/null +++ b/src/modules/module-rtp-sink.c @@ -0,0 +1,975 @@ +/* PipeWire + * + * Copyright © 2022 Wim Taymans <wim.taymans@gmail.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include "config.h" + +#include <limits.h> +#include <unistd.h> +#include <sys/stat.h> +#include <sys/socket.h> +#include <sys/ioctl.h> +#include <arpa/inet.h> +#include <netinet/ip.h> +#include <netinet/in.h> +#include <net/if.h> +#include <ctype.h> + +#include <spa/utils/hook.h> +#include <spa/utils/result.h> +#include <spa/utils/ringbuffer.h> +#include <spa/utils/json.h> +#include <spa/param/audio/format-utils.h> +#include <spa/debug/types.h> + +#include <pipewire/pipewire.h> +#include <pipewire/impl.h> + +#include <module-rtp/sap.h> +#include <module-rtp/rtp.h> + + +/** \page page_module_rtp_sink PipeWire Module: RTP sink + * + * The `rtp-sink` module creates a PipeWire sink that sends audio + * RTP packets. + * + * ## Module Options + * + * Options specific to the behavior of this module + * + * - `sap.ip = <str>`: IP address of the SAP messages, default "224.0.0.56" + * - `sap.port = <int>`: port of the SAP messages, default 9875 + * - `source.ip =<str>`: source IP address, default "0.0.0.0" + * - `destination.ip =<str>`: destination IP address, default "224.0.0.56" + * - `destination.port =<int>`: destination port, default random beteen 46000 and 47024 + * - `local.ifname = <str>`: interface name to use + * - `net.mtu = <int>`: MTU to use, default 1280 + * - `net.ttl = <int>`: TTL to use, default 1 + * - `net.loop = <bool>`: loopback multicast, default false + * - `sess.min-ptime = <int>`: minimum packet time in milliseconds, default 2 + * - `sess.max-ptime = <int>`: maximum packet time in milliseconds, default 20 + * - `sess.name = <str>`: a session name + * - `stream.props = {}`: properties to be passed to the stream + * + * ## General options + * + * Options with well-known behavior: + * + * - \ref PW_KEY_REMOTE_NAME + * - \ref PW_KEY_AUDIO_FORMAT + * - \ref PW_KEY_AUDIO_RATE + * - \ref PW_KEY_AUDIO_CHANNELS + * - \ref SPA_KEY_AUDIO_POSITION + * - \ref PW_KEY_NODE_NAME + * - \ref PW_KEY_NODE_DESCRIPTION + * - \ref PW_KEY_MEDIA_NAME + * - \ref PW_KEY_NODE_GROUP + * - \ref PW_KEY_NODE_LATENCY + * - \ref PW_KEY_NODE_VIRTUAL + * - \ref PW_KEY_MEDIA_CLASS + * + * ## Example configuration + *\code{.unparsed} + * context.modules = [ + * { name = libpipewire-module-rtp-sink + * args = { + * #sap.ip = "224.0.0.56" + * #sap.port = 9875 + * #source.ip = "0.0.0.0" + * #destination.ip = "224.0.0.56" + * #destination.port = 46000 + * #local.ifname = "eth0" + * #net.mtu = 1280 + * #net.ttl = 1 + * #net.loop = false + * #sess.min-ptime = 2 + * #sess.max-ptime = 20 + * #sess.name = "PipeWire RTP stream" + * #audio.format = "S16BE" + * #audio.rate = 48000 + * #audio.channels = 2 + * #audio.position = [ FL FR ] + * stream.props = { + * node.name = "rtp-sink" + * } + * } + *} + *] + *\endcode + * + * \since 0.3.60 + */ + +#define NAME "rtp-sink" + +PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME); +#define PW_LOG_TOPIC_DEFAULT mod_topic + +#define SAP_INTERVAL_SEC 5 +#define SAP_MIME_TYPE "application/sdp" + +#define BUFFER_SIZE (1u<<20) +#define BUFFER_MASK (BUFFER_SIZE-1) + +#define DEFAULT_SAP_IP "224.0.0.56" +#define DEFAULT_SAP_PORT 9875 + +#define DEFAULT_FORMAT "S16BE" +#define DEFAULT_RATE 48000 +#define DEFAULT_CHANNELS 2 +#define DEFAULT_POSITION "[ FL FR ]" + +#define DEFAULT_PORT 46000 +#define DEFAULT_SOURCE_IP "0.0.0.0" +#define DEFAULT_DESTINATION_IP "224.0.0.56" +#define DEFAULT_TTL 1 +#define DEFAULT_MTU 1280 +#define DEFAULT_LOOP false + +#define DEFAULT_MIN_PTIME 2 +#define DEFAULT_MAX_PTIME 20 + +#define USAGE "sap.ip=<SAP IP address to send announce, default:"DEFAULT_SAP_IP"> " \ + "sap.port=<SAP port to send on, default:"SPA_STRINGIFY(DEFAULT_SAP_PORT)"> " \ + "source.ip=<source IP address, default:"DEFAULT_SOURCE_IP"> " \ + "destination.ip=<destination IP address, default:"DEFAULT_DESTINATION_IP"> " \ + "local.ifname=<local interface name to use> " \ + "net.mtu=<desired MTU, default:"SPA_STRINGIFY(DEFAULT_MTU)"> " \ + "net.ttl=<desired TTL, default:"SPA_STRINGIFY(DEFAULT_TTL)"> " \ + "net.loop=<desired loopback, default:"SPA_STRINGIFY(DEFAULT_LOOP)"> " \ + "sess.name=<a name for the session> " \ + "sess.min-ptime=<minimum packet time in milliseconds, default:2> " \ + "sess.max-ptime=<maximum packet time in milliseconds, default:20> " \ + "audio.format=<format, default:"DEFAULT_FORMAT"> " \ + "audio.rate=<sample rate, default:"SPA_STRINGIFY(DEFAULT_RATE)"> " \ + "audio.channels=<number of channels, default:"SPA_STRINGIFY(DEFAULT_CHANNELS)"> "\ + "audio.position=<channel map, default:"DEFAULT_POSITION"> " \ + "stream.props= { key=value ... }" + +static const struct spa_dict_item module_info[] = { + { PW_KEY_MODULE_AUTHOR, "Wim Taymans <wim.taymans@gmail.com>" }, + { PW_KEY_MODULE_DESCRIPTION, "RTP Sink" }, + { PW_KEY_MODULE_USAGE, USAGE }, + { PW_KEY_MODULE_VERSION, PACKAGE_VERSION }, +}; + +static const struct format_info { + uint32_t format; + uint32_t size; + const char *mime; +} format_info[] = { + { SPA_AUDIO_FORMAT_U8, 1, "L8" }, + { SPA_AUDIO_FORMAT_ALAW, 1, "PCMA" }, + { SPA_AUDIO_FORMAT_ULAW, 1, "PCMU" }, + { SPA_AUDIO_FORMAT_S16_BE, 2, "L16" }, + { SPA_AUDIO_FORMAT_S24_BE, 3, "L24" }, +}; + +static const struct format_info *find_format_info(uint32_t format) +{ + SPA_FOR_EACH_ELEMENT_VAR(format_info, f) + if (f->format == format) + return f; + return NULL; +} + +struct impl { + struct pw_impl_module *module; + struct spa_hook module_listener; + struct pw_properties *props; + struct pw_context *module_context; + + struct pw_loop *loop; + + struct pw_core *core; + struct spa_hook core_listener; + struct spa_hook core_proxy_listener; + + struct spa_source *timer; + + struct pw_properties *stream_props; + struct pw_stream *stream; + struct spa_hook stream_listener; + + unsigned int do_disconnect:1; + + char *ifname; + char *session_name; + int sess_latency_msec; + int mtu; + bool ttl; + bool mcast_loop; + uint32_t min_ptime; + uint32_t max_ptime; + uint32_t pbytes; + + struct sockaddr_storage src_addr; + socklen_t src_len; + + uint16_t port; + struct sockaddr_storage dst_addr; + socklen_t dst_len; + + uint16_t sap_port; + struct sockaddr_storage sap_addr; + socklen_t sap_len; + + uint16_t msg_id_hash; + uint32_t ntp; + + struct spa_audio_info_raw info; + const struct format_info *format_info; + uint32_t frame_size; + int payload; + uint16_t seq; + uint32_t timestamp; + uint32_t ssrc; + + struct spa_ringbuffer ring; + uint8_t buffer[BUFFER_SIZE]; + + int rtp_fd; + int sap_fd; +}; + + +static void stream_destroy(void *d) +{ + struct impl *impl = d; + spa_hook_remove(&impl->stream_listener); + impl->stream = NULL; +} + +static inline void +set_iovec(struct spa_ringbuffer *rbuf, void *buffer, uint32_t size, + uint32_t offset, struct iovec *iov, uint32_t len) +{ + iov[0].iov_len = SPA_MIN(len, size - offset); + iov[0].iov_base = SPA_PTROFF(buffer, offset, void); + iov[1].iov_len = len - iov[0].iov_len; + iov[1].iov_base = buffer; +} + +static void flush_packets(struct impl *impl) +{ + int32_t avail; + uint32_t index; + struct iovec iov[3]; + struct msghdr msg; + ssize_t n; + struct rtp_header header; + int32_t tosend; + + avail = spa_ringbuffer_get_read_index(&impl->ring, &index); + + tosend = impl->pbytes; + + if (avail < tosend) + return; + + spa_zero(header); + header.v = 2; + header.pt = impl->payload; + header.ssrc = htonl(impl->ssrc); + + iov[0].iov_base = &header; + iov[0].iov_len = sizeof(header); + + msg.msg_name = NULL; + msg.msg_namelen = 0; + msg.msg_iov = iov; + msg.msg_iovlen = 3; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + + while (avail >= tosend) { + header.sequence_number = htons(impl->seq); + header.timestamp = htonl(impl->timestamp); + + set_iovec(&impl->ring, + impl->buffer, BUFFER_SIZE, + index & BUFFER_MASK, + &iov[1], tosend); + + n = sendmsg(impl->rtp_fd, &msg, MSG_NOSIGNAL); + if (n < 0) { + switch (errno) { + case ECONNREFUSED: + case ECONNRESET: + pw_log_debug("remote end not listening"); + break; + default: + pw_log_warn("sendmsg() failed: %m"); + break; + } + } + + impl->seq++; + impl->timestamp += tosend / impl->frame_size; + + index += tosend; + avail -= tosend; + } + spa_ringbuffer_read_update(&impl->ring, index); +} + +static void stream_process(void *data) +{ + struct impl *impl = data; + struct pw_buffer *buf; + struct spa_data *d; + uint32_t index; + int32_t filled, wanted; + + if ((buf = pw_stream_dequeue_buffer(impl->stream)) == NULL) { + pw_log_debug("Out of stream buffers: %m"); + return; + } + d = buf->buffer->datas; + + wanted = d[0].chunk->size; + + filled = spa_ringbuffer_get_write_index(&impl->ring, &index); + + if (filled + wanted > (int32_t)BUFFER_SIZE) { + pw_log_warn("overrun %u + %u > %u", filled, wanted, BUFFER_SIZE); + } else { + spa_ringbuffer_write_data(&impl->ring, + impl->buffer, + BUFFER_SIZE, + index & BUFFER_MASK, + d[0].data, wanted); + + index += wanted; + spa_ringbuffer_write_update(&impl->ring, index); + } + pw_stream_queue_buffer(impl->stream, buf); + + flush_packets(impl); +} + +static void on_stream_state_changed(void *d, enum pw_stream_state old, + enum pw_stream_state state, const char *error) +{ + struct impl *impl = d; + + switch (state) { + case PW_STREAM_STATE_UNCONNECTED: + pw_log_info("stream disconnected, unloading"); + pw_impl_module_schedule_destroy(impl->module); + break; + case PW_STREAM_STATE_ERROR: + pw_log_error("stream error: %s", error); + break; + default: + break; + } +} + +static const struct pw_stream_events in_stream_events = { + PW_VERSION_STREAM_EVENTS, + .destroy = stream_destroy, + .state_changed = on_stream_state_changed, + .process = stream_process +}; + +static int parse_address(const char *address, uint16_t port, + struct sockaddr_storage *addr, socklen_t *len) +{ + struct sockaddr_in *sa4 = (struct sockaddr_in*)addr; + struct sockaddr_in6 *sa6 = (struct sockaddr_in6*)addr; + + if (inet_pton(AF_INET, address, &sa4->sin_addr) > 0) { + sa4->sin_family = AF_INET; + sa4->sin_port = htons(port); + *len = sizeof(*sa4); + } else if (inet_pton(AF_INET6, address, &sa6->sin6_addr) > 0) { + sa6->sin6_family = AF_INET6; + sa6->sin6_port = htons(port); + *len = sizeof(*sa6); + } else + return -EINVAL; + + return 0; +} + +static bool is_multicast(struct sockaddr *sa, socklen_t salen) +{ + if (sa->sa_family == AF_INET) { + static const uint32_t ipv4_mcast_mask = 0xe0000000; + struct sockaddr_in *sa4 = (struct sockaddr_in*)sa; + return (ntohl(sa4->sin_addr.s_addr) & ipv4_mcast_mask) == ipv4_mcast_mask; + } else if (sa->sa_family == AF_INET6) { + struct sockaddr_in6 *sa6 = (struct sockaddr_in6*)sa; + return sa6->sin6_addr.s6_addr[0] == 0xff; + } + return false; +} + +static int make_socket(struct sockaddr_storage *src, socklen_t src_len, + struct sockaddr_storage *dst, socklen_t dst_len, + bool loop, int ttl) +{ + int af, fd, val, res; + + af = src->ss_family; + if ((fd = socket(af, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0)) < 0) { + pw_log_error("socket failed: %m"); + return -errno; + } + if (bind(fd, (struct sockaddr*)src, src_len) < 0) { + res = -errno; + pw_log_error("bind() failed: %m"); + goto error; + } + if (connect(fd, (struct sockaddr*)dst, dst_len) < 0) { + res = -errno; + pw_log_error("connect() failed: %m"); + goto error; + } + if (is_multicast((struct sockaddr*)dst, dst_len)) { + val = loop; + if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &val, sizeof(val)) < 0) + pw_log_warn("setsockopt(IP_MULTICAST_LOOP) failed: %m"); + + val = ttl; + if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL, &val, sizeof(val)) < 0) + pw_log_warn("setsockopt(IP_MULTICAST_TTL) failed: %m"); + } +#ifdef SO_PRIORITY + val = 6; + if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &val, sizeof(val)) < 0) + pw_log_warn("setsockopt(SO_PRIORITY) failed: %m"); +#endif + val = IPTOS_LOWDELAY; + if (setsockopt(fd, IPPROTO_IP, IP_TOS, &val, sizeof(val)) < 0) + pw_log_warn("setsockopt(IP_TOS) failed: %m"); + + + return fd; +error: + close(fd); + return res; +} + +static int setup_stream(struct impl *impl) +{ + const struct spa_pod *params[1]; + struct spa_pod_builder b; + uint32_t n_params; + uint8_t buffer[1024]; + struct pw_properties *props; + int res, fd; + + props = pw_properties_copy(impl->stream_props); + if (props == NULL) + return -errno; + + if (pw_properties_get(props, PW_KEY_NODE_LATENCY) == NULL) { + pw_properties_setf(props, PW_KEY_NODE_LATENCY, + "%d/%d", impl->pbytes / impl->frame_size, + impl->info.rate); + } + pw_properties_setf(props, PW_KEY_NODE_RATE, "1/%d", impl->info.rate); + + impl->stream = pw_stream_new(impl->core, + "rtp-sink capture", props); + if (impl->stream == NULL) + return -errno; + + pw_stream_add_listener(impl->stream, + &impl->stream_listener, + &in_stream_events, impl); + + n_params = 0; + spa_pod_builder_init(&b, buffer, sizeof(buffer)); + params[n_params++] = spa_format_audio_raw_build(&b, SPA_PARAM_EnumFormat, + &impl->info); + + if ((res = pw_stream_connect(impl->stream, + PW_DIRECTION_INPUT, + PW_ID_ANY, + PW_STREAM_FLAG_MAP_BUFFERS | + PW_STREAM_FLAG_AUTOCONNECT | + PW_STREAM_FLAG_RT_PROCESS, + params, n_params)) < 0) + return res; + + + if ((fd = make_socket(&impl->src_addr, impl->src_len, + &impl->dst_addr, impl->dst_len, + impl->mcast_loop, impl->ttl)) < 0) + return fd; + + impl->rtp_fd = fd; + + return 0; +} + +static int get_ip(const struct sockaddr_storage *sa, char *ip, size_t len) +{ + if (sa->ss_family == AF_INET) { + struct sockaddr_in *in = (struct sockaddr_in*)sa; + inet_ntop(sa->ss_family, &in->sin_addr, ip, len); + } else if (sa->ss_family == AF_INET6) { + struct sockaddr_in6 *in = (struct sockaddr_in6*)sa; + inet_ntop(sa->ss_family, &in->sin6_addr, ip, len); + } else + return -EIO; + return 0; +} +static void send_sap(struct impl *impl, bool bye) +{ + char buffer[2048], src_addr[64], dst_addr[64], dst_ttl[8]; + const char *user_name, *af; + struct sockaddr *sa = (struct sockaddr*)&impl->src_addr; + struct sap_header header; + struct iovec iov[4]; + struct msghdr msg; + + spa_zero(header); + header.v = 1; + header.t = bye; + header.msg_id_hash = impl->msg_id_hash; + + iov[0].iov_base = &header; + iov[0].iov_len = sizeof(header); + + if (sa->sa_family == AF_INET) { + iov[1].iov_base = &((struct sockaddr_in*) sa)->sin_addr; + iov[1].iov_len = 4U; + af = "IP4"; + } else { + iov[1].iov_base = &((struct sockaddr_in6*) sa)->sin6_addr; + iov[1].iov_len = 16U; + header.a = 1; + af = "IP6"; + } + iov[2].iov_base = SAP_MIME_TYPE; + iov[2].iov_len = sizeof(SAP_MIME_TYPE); + + get_ip(&impl->src_addr, src_addr, sizeof(src_addr)); + get_ip(&impl->dst_addr, dst_addr, sizeof(dst_addr)); + + if ((user_name = pw_get_user_name()) == NULL) + user_name = "-"; + + spa_zero(dst_ttl); + if (is_multicast((struct sockaddr*)&impl->dst_addr, impl->dst_len)) + snprintf(dst_ttl, sizeof(dst_ttl), "/%d", impl->ttl); + + snprintf(buffer, sizeof(buffer), + "v=0\n" + "o=%s %u 0 IN %s %s\n" + "s=%s\n" + "c=IN %s %s%s\n" + "t=%u 0\n" + "a=recvonly\n" + "a=tool:PipeWire %s\n" + "m=audio %u RTP/AVP %i\n" + "a=rtpmap:%i %s/%u/%u\n" + "a=type:broadcast\n" + "a=ptime:%d\n", + user_name, impl->ntp, af, src_addr, + impl->session_name, + af, dst_addr, dst_ttl, + impl->ntp, + pw_get_library_version(), + impl->port, impl->payload, + impl->payload, impl->format_info->mime, + impl->info.rate, impl->info.channels, + (impl->pbytes / impl->frame_size) * 1000 / impl->info.rate); + + iov[3].iov_base = buffer; + iov[3].iov_len = strlen(buffer); + + msg.msg_name = NULL; + msg.msg_namelen = 0; + msg.msg_iov = iov; + msg.msg_iovlen = 4; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + + sendmsg(impl->sap_fd, &msg, MSG_NOSIGNAL); +} + +static void on_timer_event(void *data, uint64_t expirations) +{ + struct impl *impl = data; + send_sap(impl, 0); +} + +static int start_sap_announce(struct impl *impl) +{ + int fd, res; + struct timespec value, interval; + + if ((fd = make_socket(&impl->src_addr, impl->src_len, + &impl->sap_addr, impl->sap_len, + impl->mcast_loop, impl->ttl)) < 0) + return fd; + + impl->sap_fd = fd; + + pw_log_info("starting SAP timer"); + impl->timer = pw_loop_add_timer(impl->loop, on_timer_event, impl); + if (impl->timer == NULL) { + res = -errno; + pw_log_error("can't create timer source: %m"); + goto error; + } + value.tv_sec = 0; + value.tv_nsec = 1; + interval.tv_sec = SAP_INTERVAL_SEC; + interval.tv_nsec = 0; + pw_loop_update_timer(impl->loop, impl->timer, &value, &interval, false); + + return 0; +error: + close(fd); + return res; + +} + +static void core_destroy(void *d) +{ + struct impl *impl = d; + spa_hook_remove(&impl->core_listener); + impl->core = NULL; + pw_impl_module_schedule_destroy(impl->module); +} + +static const struct pw_proxy_events core_proxy_events = { + .destroy = core_destroy, +}; + +static void impl_destroy(struct impl *impl) +{ + send_sap(impl, 1); + + if (impl->stream) + pw_stream_destroy(impl->stream); + + if (impl->core && impl->do_disconnect) + pw_core_disconnect(impl->core); + + if (impl->timer) + pw_loop_destroy_source(impl->loop, impl->timer); + + if (impl->rtp_fd != -1) + close(impl->rtp_fd); + if (impl->sap_fd != -1) + close(impl->sap_fd); + + pw_properties_free(impl->stream_props); + pw_properties_free(impl->props); + + free(impl->ifname); + free(impl->session_name); + free(impl); +} + +static void module_destroy(void *d) +{ + struct impl *impl = d; + spa_hook_remove(&impl->module_listener); + impl_destroy(impl); +} + +static const struct pw_impl_module_events module_events = { + PW_VERSION_IMPL_MODULE_EVENTS, + .destroy = module_destroy, +}; + +static void on_core_error(void *d, uint32_t id, int seq, int res, const char *message) +{ + struct impl *impl = d; + + pw_log_error("error id:%u seq:%d res:%d (%s): %s", + id, seq, res, spa_strerror(res), message); + + if (id == PW_ID_CORE && res == -EPIPE) + pw_impl_module_schedule_destroy(impl->module); +} + +static const struct pw_core_events core_events = { + PW_VERSION_CORE_EVENTS, + .error = on_core_error, +}; + +static inline uint32_t format_from_name(const char *name, size_t len) +{ + int i; + for (i = 0; spa_type_audio_format[i].name; i++) { + if (strncmp(name, spa_debug_type_short_name(spa_type_audio_format[i].name), len) == 0) + return spa_type_audio_format[i].type; + } + return SPA_AUDIO_FORMAT_UNKNOWN; +} + +static uint32_t channel_from_name(const char *name) +{ + int i; + for (i = 0; spa_type_audio_channel[i].name; i++) { + if (spa_streq(name, spa_debug_type_short_name(spa_type_audio_channel[i].name))) + return spa_type_audio_channel[i].type; + } + return SPA_AUDIO_CHANNEL_UNKNOWN; +} + +static void parse_position(struct spa_audio_info_raw *info, const char *val, size_t len) +{ + struct spa_json it[2]; + char v[256]; + + spa_json_init(&it[0], val, len); + if (spa_json_enter_array(&it[0], &it[1]) <= 0) + spa_json_init(&it[1], val, len); + + info->channels = 0; + while (spa_json_get_string(&it[1], v, sizeof(v)) > 0 && + info->channels < SPA_AUDIO_MAX_CHANNELS) { + info->position[info->channels++] = channel_from_name(v); + } +} + +static void parse_audio_info(const struct pw_properties *props, struct spa_audio_info_raw *info) +{ + const char *str; + + spa_zero(*info); + if ((str = pw_properties_get(props, PW_KEY_AUDIO_FORMAT)) == NULL) + str = DEFAULT_FORMAT; + info->format = format_from_name(str, strlen(str)); + + info->rate = pw_properties_get_uint32(props, PW_KEY_AUDIO_RATE, info->rate); + if (info->rate == 0) + info->rate = DEFAULT_RATE; + + info->channels = pw_properties_get_uint32(props, PW_KEY_AUDIO_CHANNELS, info->channels); + info->channels = SPA_MIN(info->channels, SPA_AUDIO_MAX_CHANNELS); + if ((str = pw_properties_get(props, SPA_KEY_AUDIO_POSITION)) != NULL) + parse_position(info, str, strlen(str)); + if (info->channels == 0) + parse_position(info, DEFAULT_POSITION, strlen(DEFAULT_POSITION)); +} + +static void copy_props(struct impl *impl, struct pw_properties *props, const char *key) +{ + const char *str; + if ((str = pw_properties_get(props, key)) != NULL) { + if (pw_properties_get(impl->stream_props, key) == NULL) + pw_properties_set(impl->stream_props, key, str); + } +} + +SPA_EXPORT +int pipewire__module_init(struct pw_impl_module *module, const char *args) +{ + struct pw_context *context = pw_impl_module_get_context(module); + struct impl *impl; + struct pw_properties *props = NULL, *stream_props = NULL; + uint32_t id = pw_global_get_id(pw_impl_module_get_global(module)); + uint32_t pid = getpid(), port, min_bytes, max_bytes; + char addr[64]; + const char *str; + int res = 0; + + PW_LOG_TOPIC_INIT(mod_topic); + + impl = calloc(1, sizeof(struct impl)); + if (impl == NULL) + return -errno; + + impl->rtp_fd = -1; + impl->sap_fd = -1; + + if (args == NULL) + args = ""; + + props = pw_properties_new_string(args); + if (props == NULL) { + res = -errno; + pw_log_error( "can't create properties: %m"); + goto out; + } + impl->props = props; + + stream_props = pw_properties_new(NULL, NULL); + if (stream_props == NULL) { + res = -errno; + pw_log_error( "can't create properties: %m"); + goto out; + } + impl->stream_props = stream_props; + + impl->module = module; + impl->module_context = context; + impl->loop = pw_context_get_main_loop(context); + + if (pw_properties_get(props, PW_KEY_NODE_VIRTUAL) == NULL) + pw_properties_set(props, PW_KEY_NODE_VIRTUAL, "true"); + if (pw_properties_get(stream_props, PW_KEY_NODE_NETWORK) == NULL) + pw_properties_set(stream_props, PW_KEY_NODE_NETWORK, "true"); + + if (pw_properties_get(props, PW_KEY_NODE_NAME) == NULL) + pw_properties_setf(props, PW_KEY_NODE_NAME, "rtp-sink-%u-%u", pid, id); + if (pw_properties_get(props, PW_KEY_NODE_DESCRIPTION) == NULL) + pw_properties_set(props, PW_KEY_NODE_DESCRIPTION, + pw_properties_get(props, PW_KEY_NODE_NAME)); + if (pw_properties_get(props, PW_KEY_MEDIA_NAME) == NULL) + pw_properties_set(props, PW_KEY_MEDIA_NAME, "RTP Sender Stream"); + + if ((str = pw_properties_get(props, "stream.props")) != NULL) + pw_properties_update_string(stream_props, str, strlen(str)); + + copy_props(impl, props, PW_KEY_AUDIO_FORMAT); + copy_props(impl, props, PW_KEY_AUDIO_RATE); + copy_props(impl, props, PW_KEY_AUDIO_CHANNELS); + copy_props(impl, props, SPA_KEY_AUDIO_POSITION); + copy_props(impl, props, PW_KEY_NODE_NAME); + copy_props(impl, props, PW_KEY_NODE_DESCRIPTION); + copy_props(impl, props, PW_KEY_NODE_GROUP); + copy_props(impl, props, PW_KEY_NODE_LATENCY); + copy_props(impl, props, PW_KEY_NODE_VIRTUAL); + copy_props(impl, props, PW_KEY_MEDIA_NAME); + copy_props(impl, props, PW_KEY_MEDIA_CLASS); + + parse_audio_info(impl->stream_props, &impl->info); + + impl->format_info = find_format_info(impl->info.format); + if (impl->format_info == NULL) { + pw_log_error("unsupported audio format:%d channels:%d", + impl->info.format, impl->info.channels); + res = -EINVAL; + goto out; + } + impl->frame_size = impl->format_info->size * impl->info.channels; + impl->msg_id_hash = rand(); + impl->ntp = (uint32_t) time(NULL) + 2208988800U; + + impl->payload = 127; + impl->seq = rand(); + impl->timestamp = rand(); + impl->ssrc = rand(); + + str = pw_properties_get(props, "local.ifname"); + impl->ifname = str ? strdup(str) : NULL; + + if ((str = pw_properties_get(props, "sap.ip")) == NULL) + str = DEFAULT_SAP_IP; + port = pw_properties_get_uint32(props, "sap.port", DEFAULT_SAP_PORT); + if ((res = parse_address(str, port, &impl->sap_addr, &impl->sap_len)) < 0) { + pw_log_error("invalid sap.ip %s: %s", str, spa_strerror(res)); + goto out; + } + + if ((str = pw_properties_get(props, "source.ip")) == NULL) + str = DEFAULT_SOURCE_IP; + if ((res = parse_address(str, 0, &impl->src_addr, &impl->src_len)) < 0) { + pw_log_error("invalid source.ip %s: %s", str, spa_strerror(res)); + goto out; + } + + impl->port = DEFAULT_PORT + ((uint32_t) (rand() % 512) << 1); + impl->port = pw_properties_get_uint32(props, "destination.port", impl->port); + if ((str = pw_properties_get(props, "destination.ip")) == NULL) + str = DEFAULT_DESTINATION_IP; + if ((res = parse_address(str, impl->port, &impl->dst_addr, &impl->dst_len)) < 0) { + pw_log_error("invalid destination.ip %s: %s", str, spa_strerror(res)); + goto out; + } + + impl->mtu = pw_properties_get_uint32(props, "net.mtu", DEFAULT_MTU); + impl->ttl = pw_properties_get_uint32(props, "net.ttl", DEFAULT_TTL); + impl->mcast_loop = pw_properties_get_bool(props, "net.loop", DEFAULT_LOOP); + + impl->min_ptime = pw_properties_get_uint32(props, "sess.min-ptime", DEFAULT_MIN_PTIME); + impl->max_ptime = pw_properties_get_uint32(props, "sess.max-ptime", DEFAULT_MAX_PTIME); + + min_bytes = (impl->min_ptime * impl->info.rate / 1000) * impl->frame_size; + max_bytes = (impl->max_ptime * impl->info.rate / 1000) * impl->frame_size; + + impl->pbytes = SPA_ROUND_DOWN(impl->mtu, impl->frame_size); + impl->pbytes = SPA_CLAMP(impl->pbytes, min_bytes, max_bytes); + + if ((str = pw_properties_get(props, "sess.name")) == NULL) + pw_properties_setf(props, "sess.name", "PipeWire RTP Stream on %s", + pw_get_host_name()); + str = pw_properties_get(props, "sess.name"); + impl->session_name = str ? strdup(str) : NULL; + + pw_properties_set(stream_props, "rtp.session", impl->session_name); + get_ip(&impl->src_addr, addr, sizeof(addr)); + pw_properties_set(stream_props, "rtp.source.ip", addr); + get_ip(&impl->dst_addr, addr, sizeof(addr)); + pw_properties_set(stream_props, "rtp.destination.ip", addr); + pw_properties_setf(stream_props, "rtp.destination.port", "%u", impl->port); + pw_properties_setf(stream_props, "rtp.mtu", "%u", impl->mtu); + pw_properties_setf(stream_props, "rtp.ttl", "%u", impl->ttl); + pw_properties_setf(stream_props, "rtp.ptime", "%u", + (impl->pbytes / impl->frame_size) * 1000 / impl->info.rate); + + impl->core = pw_context_get_object(impl->module_context, PW_TYPE_INTERFACE_Core); + if (impl->core == NULL) { + str = pw_properties_get(props, PW_KEY_REMOTE_NAME); + impl->core = pw_context_connect(impl->module_context, + pw_properties_new( + PW_KEY_REMOTE_NAME, str, + NULL), + 0); + impl->do_disconnect = true; + } + if (impl->core == NULL) { + res = -errno; + pw_log_error("can't connect: %m"); + goto out; + } + + pw_proxy_add_listener((struct pw_proxy*)impl->core, + &impl->core_proxy_listener, + &core_proxy_events, impl); + pw_core_add_listener(impl->core, + &impl->core_listener, + &core_events, impl); + + if ((res = setup_stream(impl)) < 0) + goto out; + + if ((res = start_sap_announce(impl)) < 0) + goto out; + + pw_impl_module_add_listener(module, &impl->module_listener, &module_events, impl); + + pw_impl_module_update_properties(module, &SPA_DICT_INIT_ARRAY(module_info)); + + pw_log_info("Successfully loaded module-rtp-sink"); + + return 0; +out: + impl_destroy(impl); + return res; +} |