| /* |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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. |
| * |
| * FFmpeg 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * Haivision Open SRT (Secure Reliable Transport) protocol |
| */ |
| |
| #include <srt/srt.h> |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/parseutils.h" |
| #include "libavutil/time.h" |
| |
| #include "avformat.h" |
| #include "internal.h" |
| #include "network.h" |
| #include "os_support.h" |
| #include "url.h" |
| |
| /* This is for MPEG-TS and it's a default SRTO_PAYLOADSIZE for SRTT_LIVE (8 TS packets) */ |
| #ifndef SRT_LIVE_DEFAULT_PAYLOAD_SIZE |
| #define SRT_LIVE_DEFAULT_PAYLOAD_SIZE 1316 |
| #endif |
| |
| /* This is the maximum payload size for Live mode, should you have a different payload type than MPEG-TS */ |
| #ifndef SRT_LIVE_MAX_PAYLOAD_SIZE |
| #define SRT_LIVE_MAX_PAYLOAD_SIZE 1456 |
| #endif |
| |
| enum SRTMode { |
| SRT_MODE_CALLER = 0, |
| SRT_MODE_LISTENER = 1, |
| SRT_MODE_RENDEZVOUS = 2 |
| }; |
| |
| typedef struct SRTContext { |
| const AVClass *class; |
| int fd; |
| int eid; |
| int64_t rw_timeout; |
| int64_t listen_timeout; |
| int recv_buffer_size; |
| int send_buffer_size; |
| |
| int64_t maxbw; |
| int pbkeylen; |
| char *passphrase; |
| int mss; |
| int ffs; |
| int ipttl; |
| int iptos; |
| int64_t inputbw; |
| int oheadbw; |
| int64_t latency; |
| int tlpktdrop; |
| int nakreport; |
| int64_t connect_timeout; |
| int payload_size; |
| int64_t rcvlatency; |
| int64_t peerlatency; |
| enum SRTMode mode; |
| } SRTContext; |
| |
| #define D AV_OPT_FLAG_DECODING_PARAM |
| #define E AV_OPT_FLAG_ENCODING_PARAM |
| #define OFFSET(x) offsetof(SRTContext, x) |
| static const AVOption libsrt_options[] = { |
| { "rw_timeout", "Timeout of socket I/O operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E }, |
| { "listen_timeout", "Connection awaiting timeout", OFFSET(listen_timeout), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E }, |
| { "send_buffer_size", "Socket send buffer size (in bytes)", OFFSET(send_buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E }, |
| { "recv_buffer_size", "Socket receive buffer size (in bytes)", OFFSET(recv_buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E }, |
| { "pkt_size", "Maximum SRT packet size", OFFSET(payload_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, SRT_LIVE_MAX_PAYLOAD_SIZE, .flags = D|E, "payload_size" }, |
| { "payload_size", "Maximum SRT packet size", OFFSET(payload_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, SRT_LIVE_MAX_PAYLOAD_SIZE, .flags = D|E, "payload_size" }, |
| { "ts_size", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRT_LIVE_DEFAULT_PAYLOAD_SIZE }, INT_MIN, INT_MAX, .flags = D|E, "payload_size" }, |
| { "max_size", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRT_LIVE_MAX_PAYLOAD_SIZE }, INT_MIN, INT_MAX, .flags = D|E, "payload_size" }, |
| { "maxbw", "Maximum bandwidth (bytes per second) that the connection can use", OFFSET(maxbw), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E }, |
| { "pbkeylen", "Crypto key len in bytes {16,24,32} Default: 16 (128-bit)", OFFSET(pbkeylen), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 32, .flags = D|E }, |
| { "passphrase", "Crypto PBKDF2 Passphrase size[0,10..64] 0:disable crypto", OFFSET(passphrase), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E }, |
| { "mss", "The Maximum Segment Size", OFFSET(mss), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1500, .flags = D|E }, |
| { "ffs", "Flight flag size (window size) (in bytes)", OFFSET(ffs), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E }, |
| { "ipttl", "IP Time To Live", OFFSET(ipttl), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 255, .flags = D|E }, |
| { "iptos", "IP Type of Service", OFFSET(iptos), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 255, .flags = D|E }, |
| { "inputbw", "Estimated input stream rate", OFFSET(inputbw), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E }, |
| { "oheadbw", "MaxBW ceiling based on % over input stream rate", OFFSET(oheadbw), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 100, .flags = D|E }, |
| { "latency", "receiver delay to absorb bursts of missed packet retransmissions", OFFSET(latency), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E }, |
| { "tsbpddelay", "deprecated, same effect as latency option", OFFSET(latency), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E }, |
| { "rcvlatency", "receive latency", OFFSET(rcvlatency), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E }, |
| { "peerlatency", "peer latency", OFFSET(peerlatency), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E }, |
| { "tlpktdrop", "Enable receiver pkt drop", OFFSET(tlpktdrop), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, .flags = D|E }, |
| { "nakreport", "Enable receiver to send periodic NAK reports", OFFSET(nakreport), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, .flags = D|E }, |
| { "connect_timeout", "Connect timeout. Caller default: 3000, rendezvous (x 10)", OFFSET(connect_timeout), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E }, |
| { "mode", "Connection mode (caller, listener, rendezvous)", OFFSET(mode), AV_OPT_TYPE_INT, { .i64 = SRT_MODE_CALLER }, SRT_MODE_CALLER, SRT_MODE_RENDEZVOUS, .flags = D|E, "mode" }, |
| { "caller", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRT_MODE_CALLER }, INT_MIN, INT_MAX, .flags = D|E, "mode" }, |
| { "listener", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRT_MODE_LISTENER }, INT_MIN, INT_MAX, .flags = D|E, "mode" }, |
| { "rendezvous", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRT_MODE_RENDEZVOUS }, INT_MIN, INT_MAX, .flags = D|E, "mode" }, |
| { NULL } |
| }; |
| |
| static int libsrt_neterrno(URLContext *h) |
| { |
| int err = srt_getlasterror(NULL); |
| av_log(h, AV_LOG_ERROR, "%s\n", srt_getlasterror_str()); |
| if (err == SRT_EASYNCRCV) |
| return AVERROR(EAGAIN); |
| return AVERROR_UNKNOWN; |
| } |
| |
| static int libsrt_socket_nonblock(int socket, int enable) |
| { |
| int ret = srt_setsockopt(socket, 0, SRTO_SNDSYN, &enable, sizeof(enable)); |
| if (ret < 0) |
| return ret; |
| return srt_setsockopt(socket, 0, SRTO_RCVSYN, &enable, sizeof(enable)); |
| } |
| |
| static int libsrt_network_wait_fd(URLContext *h, int eid, int fd, int write) |
| { |
| int ret, len = 1; |
| int modes = write ? SRT_EPOLL_OUT : SRT_EPOLL_IN; |
| SRTSOCKET ready[1]; |
| |
| if (srt_epoll_add_usock(eid, fd, &modes) < 0) |
| return libsrt_neterrno(h); |
| if (write) { |
| ret = srt_epoll_wait(eid, 0, 0, ready, &len, POLLING_TIME, 0, 0, 0, 0); |
| } else { |
| ret = srt_epoll_wait(eid, ready, &len, 0, 0, POLLING_TIME, 0, 0, 0, 0); |
| } |
| if (ret < 0) { |
| if (srt_getlasterror(NULL) == SRT_ETIMEOUT) |
| ret = AVERROR(EAGAIN); |
| else |
| ret = libsrt_neterrno(h); |
| } else { |
| ret = 0; |
| } |
| if (srt_epoll_remove_usock(eid, fd) < 0) |
| return libsrt_neterrno(h); |
| return ret; |
| } |
| |
| /* TODO de-duplicate code from ff_network_wait_fd_timeout() */ |
| |
| static int libsrt_network_wait_fd_timeout(URLContext *h, int eid, int fd, int write, int64_t timeout, AVIOInterruptCB *int_cb) |
| { |
| int ret; |
| int64_t wait_start = 0; |
| |
| while (1) { |
| if (ff_check_interrupt(int_cb)) |
| return AVERROR_EXIT; |
| ret = libsrt_network_wait_fd(h, eid, fd, write); |
| if (ret != AVERROR(EAGAIN)) |
| return ret; |
| if (timeout > 0) { |
| if (!wait_start) |
| wait_start = av_gettime_relative(); |
| else if (av_gettime_relative() - wait_start > timeout) |
| return AVERROR(ETIMEDOUT); |
| } |
| } |
| } |
| |
| static int libsrt_listen(int eid, int fd, const struct sockaddr *addr, socklen_t addrlen, URLContext *h, int timeout) |
| { |
| int ret; |
| int reuse = 1; |
| if (srt_setsockopt(fd, SOL_SOCKET, SRTO_REUSEADDR, &reuse, sizeof(reuse))) { |
| av_log(h, AV_LOG_WARNING, "setsockopt(SRTO_REUSEADDR) failed\n"); |
| } |
| ret = srt_bind(fd, addr, addrlen); |
| if (ret) |
| return libsrt_neterrno(h); |
| |
| ret = srt_listen(fd, 1); |
| if (ret) |
| return libsrt_neterrno(h); |
| |
| while ((ret = libsrt_network_wait_fd_timeout(h, eid, fd, 1, timeout, &h->interrupt_callback))) { |
| switch (ret) { |
| case AVERROR(ETIMEDOUT): |
| continue; |
| default: |
| return ret; |
| } |
| } |
| |
| ret = srt_accept(fd, NULL, NULL); |
| if (ret < 0) |
| return libsrt_neterrno(h); |
| if (libsrt_socket_nonblock(ret, 1) < 0) |
| av_log(h, AV_LOG_DEBUG, "libsrt_socket_nonblock failed\n"); |
| |
| return ret; |
| } |
| |
| static int libsrt_listen_connect(int eid, int fd, const struct sockaddr *addr, socklen_t addrlen, int timeout, URLContext *h, int will_try_next) |
| { |
| int ret; |
| |
| if (libsrt_socket_nonblock(fd, 1) < 0) |
| av_log(h, AV_LOG_DEBUG, "ff_socket_nonblock failed\n"); |
| |
| while ((ret = srt_connect(fd, addr, addrlen))) { |
| ret = libsrt_neterrno(h); |
| switch (ret) { |
| case AVERROR(EINTR): |
| if (ff_check_interrupt(&h->interrupt_callback)) |
| return AVERROR_EXIT; |
| continue; |
| case AVERROR(EINPROGRESS): |
| case AVERROR(EAGAIN): |
| ret = libsrt_network_wait_fd_timeout(h, eid, fd, 1, timeout, &h->interrupt_callback); |
| if (ret < 0) |
| return ret; |
| ret = srt_getlasterror(NULL); |
| srt_clearlasterror(); |
| if (ret != 0) { |
| char buf[128]; |
| ret = AVERROR(ret); |
| av_strerror(ret, buf, sizeof(buf)); |
| if (will_try_next) |
| av_log(h, AV_LOG_WARNING, |
| "Connection to %s failed (%s), trying next address\n", |
| h->filename, buf); |
| else |
| av_log(h, AV_LOG_ERROR, "Connection to %s failed: %s\n", |
| h->filename, buf); |
| } |
| default: |
| return ret; |
| } |
| } |
| return ret; |
| } |
| |
| static int libsrt_setsockopt(URLContext *h, int fd, SRT_SOCKOPT optname, const char * optnamestr, const void * optval, int optlen) |
| { |
| if (srt_setsockopt(fd, 0, optname, optval, optlen) < 0) { |
| av_log(h, AV_LOG_ERROR, "failed to set option %s on socket: %s\n", optnamestr, srt_getlasterror_str()); |
| return AVERROR(EIO); |
| } |
| return 0; |
| } |
| |
| static int libsrt_getsockopt(URLContext *h, int fd, SRT_SOCKOPT optname, const char * optnamestr, void * optval, int * optlen) |
| { |
| if (srt_getsockopt(fd, 0, optname, optval, optlen) < 0) { |
| av_log(h, AV_LOG_ERROR, "failed to get option %s on socket: %s\n", optnamestr, srt_getlasterror_str()); |
| return AVERROR(EIO); |
| } |
| return 0; |
| } |
| |
| /* - The "POST" options can be altered any time on a connected socket. |
| They MAY have also some meaning when set prior to connecting; such |
| option is SRTO_RCVSYN, which makes connect/accept call asynchronous. |
| Because of that this option is treated special way in this app. */ |
| static int libsrt_set_options_post(URLContext *h, int fd) |
| { |
| SRTContext *s = h->priv_data; |
| |
| if ((s->inputbw >= 0 && libsrt_setsockopt(h, fd, SRTO_INPUTBW, "SRTO_INPUTBW", &s->inputbw, sizeof(s->inputbw)) < 0) || |
| (s->oheadbw >= 0 && libsrt_setsockopt(h, fd, SRTO_OHEADBW, "SRTO_OHEADBW", &s->oheadbw, sizeof(s->oheadbw)) < 0)) { |
| return AVERROR(EIO); |
| } |
| return 0; |
| } |
| |
| /* - The "PRE" options must be set prior to connecting and can't be altered |
| on a connected socket, however if set on a listening socket, they are |
| derived by accept-ed socket. */ |
| static int libsrt_set_options_pre(URLContext *h, int fd) |
| { |
| SRTContext *s = h->priv_data; |
| int yes = 1; |
| int latency = s->latency / 1000; |
| int rcvlatency = s->rcvlatency / 1000; |
| int peerlatency = s->peerlatency / 1000; |
| int connect_timeout = s->connect_timeout; |
| |
| if ((s->mode == SRT_MODE_RENDEZVOUS && libsrt_setsockopt(h, fd, SRTO_RENDEZVOUS, "SRTO_RENDEZVOUS", &yes, sizeof(yes)) < 0) || |
| (s->maxbw >= 0 && libsrt_setsockopt(h, fd, SRTO_MAXBW, "SRTO_MAXBW", &s->maxbw, sizeof(s->maxbw)) < 0) || |
| (s->pbkeylen >= 0 && libsrt_setsockopt(h, fd, SRTO_PBKEYLEN, "SRTO_PBKEYLEN", &s->pbkeylen, sizeof(s->pbkeylen)) < 0) || |
| (s->passphrase && libsrt_setsockopt(h, fd, SRTO_PASSPHRASE, "SRTO_PASSPHRASE", s->passphrase, strlen(s->passphrase)) < 0) || |
| (s->mss >= 0 && libsrt_setsockopt(h, fd, SRTO_MSS, "SRTO_MMS", &s->mss, sizeof(s->mss)) < 0) || |
| (s->ffs >= 0 && libsrt_setsockopt(h, fd, SRTO_FC, "SRTO_FC", &s->ffs, sizeof(s->ffs)) < 0) || |
| (s->ipttl >= 0 && libsrt_setsockopt(h, fd, SRTO_IPTTL, "SRTO_UPTTL", &s->ipttl, sizeof(s->ipttl)) < 0) || |
| (s->iptos >= 0 && libsrt_setsockopt(h, fd, SRTO_IPTOS, "SRTO_IPTOS", &s->iptos, sizeof(s->iptos)) < 0) || |
| (s->latency >= 0 && libsrt_setsockopt(h, fd, SRTO_LATENCY, "SRTO_LATENCY", &latency, sizeof(latency)) < 0) || |
| (s->rcvlatency >= 0 && libsrt_setsockopt(h, fd, SRTO_RCVLATENCY, "SRTO_RCVLATENCY", &rcvlatency, sizeof(rcvlatency)) < 0) || |
| (s->peerlatency >= 0 && libsrt_setsockopt(h, fd, SRTO_PEERLATENCY, "SRTO_PEERLATENCY", &peerlatency, sizeof(peerlatency)) < 0) || |
| (s->tlpktdrop >= 0 && libsrt_setsockopt(h, fd, SRTO_TLPKTDROP, "SRTO_TLPKDROP", &s->tlpktdrop, sizeof(s->tlpktdrop)) < 0) || |
| (s->nakreport >= 0 && libsrt_setsockopt(h, fd, SRTO_NAKREPORT, "SRTO_NAKREPORT", &s->nakreport, sizeof(s->nakreport)) < 0) || |
| (connect_timeout >= 0 && libsrt_setsockopt(h, fd, SRTO_CONNTIMEO, "SRTO_CONNTIMEO", &connect_timeout, sizeof(connect_timeout)) <0 ) || |
| (s->payload_size >= 0 && libsrt_setsockopt(h, fd, SRTO_PAYLOADSIZE, "SRTO_PAYLOADSIZE", &s->payload_size, sizeof(s->payload_size)) < 0)) { |
| return AVERROR(EIO); |
| } |
| return 0; |
| } |
| |
| |
| static int libsrt_setup(URLContext *h, const char *uri, int flags) |
| { |
| struct addrinfo hints = { 0 }, *ai, *cur_ai; |
| int port, fd = -1; |
| SRTContext *s = h->priv_data; |
| const char *p; |
| char buf[256]; |
| int ret; |
| char hostname[1024],proto[1024],path[1024]; |
| char portstr[10]; |
| int open_timeout = 5000000; |
| int eid; |
| |
| eid = srt_epoll_create(); |
| if (eid < 0) |
| return libsrt_neterrno(h); |
| s->eid = eid; |
| |
| av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), |
| &port, path, sizeof(path), uri); |
| if (strcmp(proto, "srt")) |
| return AVERROR(EINVAL); |
| if (port <= 0 || port >= 65536) { |
| av_log(h, AV_LOG_ERROR, "Port missing in uri\n"); |
| return AVERROR(EINVAL); |
| } |
| p = strchr(uri, '?'); |
| if (p) { |
| if (av_find_info_tag(buf, sizeof(buf), "timeout", p)) { |
| s->rw_timeout = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "listen_timeout", p)) { |
| s->listen_timeout = strtol(buf, NULL, 10); |
| } |
| } |
| if (s->rw_timeout >= 0) { |
| open_timeout = h->rw_timeout = s->rw_timeout; |
| } |
| hints.ai_family = AF_UNSPEC; |
| hints.ai_socktype = SOCK_DGRAM; |
| snprintf(portstr, sizeof(portstr), "%d", port); |
| if (s->mode == SRT_MODE_LISTENER) |
| hints.ai_flags |= AI_PASSIVE; |
| ret = getaddrinfo(hostname[0] ? hostname : NULL, portstr, &hints, &ai); |
| if (ret) { |
| av_log(h, AV_LOG_ERROR, |
| "Failed to resolve hostname %s: %s\n", |
| hostname, gai_strerror(ret)); |
| return AVERROR(EIO); |
| } |
| |
| cur_ai = ai; |
| |
| restart: |
| |
| fd = srt_socket(cur_ai->ai_family, cur_ai->ai_socktype, 0); |
| if (fd < 0) { |
| ret = libsrt_neterrno(h); |
| goto fail; |
| } |
| |
| if ((ret = libsrt_set_options_pre(h, fd)) < 0) { |
| goto fail; |
| } |
| |
| /* Set the socket's send or receive buffer sizes, if specified. |
| If unspecified or setting fails, system default is used. */ |
| if (s->recv_buffer_size > 0) { |
| srt_setsockopt(fd, SOL_SOCKET, SRTO_UDP_RCVBUF, &s->recv_buffer_size, sizeof (s->recv_buffer_size)); |
| } |
| if (s->send_buffer_size > 0) { |
| srt_setsockopt(fd, SOL_SOCKET, SRTO_UDP_SNDBUF, &s->send_buffer_size, sizeof (s->send_buffer_size)); |
| } |
| if (s->mode == SRT_MODE_LISTENER) { |
| // multi-client |
| if ((ret = libsrt_listen(s->eid, fd, cur_ai->ai_addr, cur_ai->ai_addrlen, h, open_timeout / 1000)) < 0) |
| goto fail1; |
| fd = ret; |
| } else { |
| if (s->mode == SRT_MODE_RENDEZVOUS) { |
| ret = srt_bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen); |
| if (ret) |
| goto fail1; |
| } |
| |
| if ((ret = libsrt_listen_connect(s->eid, fd, cur_ai->ai_addr, cur_ai->ai_addrlen, |
| open_timeout / 1000, h, !!cur_ai->ai_next)) < 0) { |
| if (ret == AVERROR_EXIT) |
| goto fail1; |
| else |
| goto fail; |
| } |
| } |
| if ((ret = libsrt_set_options_post(h, fd)) < 0) { |
| goto fail; |
| } |
| |
| if (flags & AVIO_FLAG_WRITE) { |
| int packet_size = 0; |
| int optlen = sizeof(packet_size); |
| ret = libsrt_getsockopt(h, fd, SRTO_PAYLOADSIZE, "SRTO_PAYLOADSIZE", &packet_size, &optlen); |
| if (ret < 0) |
| goto fail1; |
| if (packet_size > 0) |
| h->max_packet_size = packet_size; |
| } |
| |
| h->is_streamed = 1; |
| s->fd = fd; |
| |
| freeaddrinfo(ai); |
| return 0; |
| |
| fail: |
| if (cur_ai->ai_next) { |
| /* Retry with the next sockaddr */ |
| cur_ai = cur_ai->ai_next; |
| if (fd >= 0) |
| srt_close(fd); |
| ret = 0; |
| goto restart; |
| } |
| fail1: |
| if (fd >= 0) |
| srt_close(fd); |
| freeaddrinfo(ai); |
| return ret; |
| } |
| |
| static int libsrt_open(URLContext *h, const char *uri, int flags) |
| { |
| SRTContext *s = h->priv_data; |
| const char * p; |
| char buf[256]; |
| |
| if (srt_startup() < 0) { |
| return AVERROR_UNKNOWN; |
| } |
| |
| /* SRT options (srt/srt.h) */ |
| p = strchr(uri, '?'); |
| if (p) { |
| if (av_find_info_tag(buf, sizeof(buf), "maxbw", p)) { |
| s->maxbw = strtoll(buf, NULL, 0); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "pbkeylen", p)) { |
| s->pbkeylen = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "passphrase", p)) { |
| s->passphrase = av_strndup(buf, strlen(buf)); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "mss", p)) { |
| s->mss = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "ffs", p)) { |
| s->ffs = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "ipttl", p)) { |
| s->ipttl = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "iptos", p)) { |
| s->iptos = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "inputbw", p)) { |
| s->inputbw = strtoll(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "oheadbw", p)) { |
| s->oheadbw = strtoll(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "latency", p)) { |
| s->latency = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "tsbpddelay", p)) { |
| s->latency = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "rcvlatency", p)) { |
| s->rcvlatency = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "peerlatency", p)) { |
| s->peerlatency = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "tlpktdrop", p)) { |
| s->tlpktdrop = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "nakreport", p)) { |
| s->nakreport = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "connect_timeout", p)) { |
| s->connect_timeout = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "payload_size", p) || |
| av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) { |
| s->payload_size = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "mode", p)) { |
| if (!strcmp(buf, "caller")) { |
| s->mode = SRT_MODE_CALLER; |
| } else if (!strcmp(buf, "listener")) { |
| s->mode = SRT_MODE_LISTENER; |
| } else if (!strcmp(buf, "rendezvous")) { |
| s->mode = SRT_MODE_RENDEZVOUS; |
| } else { |
| return AVERROR(EIO); |
| } |
| } |
| } |
| return libsrt_setup(h, uri, flags); |
| } |
| |
| static int libsrt_read(URLContext *h, uint8_t *buf, int size) |
| { |
| SRTContext *s = h->priv_data; |
| int ret; |
| |
| if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
| ret = libsrt_network_wait_fd_timeout(h, s->eid, s->fd, 0, h->rw_timeout, &h->interrupt_callback); |
| if (ret) |
| return ret; |
| } |
| |
| ret = srt_recvmsg(s->fd, buf, size); |
| if (ret < 0) { |
| ret = libsrt_neterrno(h); |
| } |
| |
| return ret; |
| } |
| |
| static int libsrt_write(URLContext *h, const uint8_t *buf, int size) |
| { |
| SRTContext *s = h->priv_data; |
| int ret; |
| |
| if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
| ret = libsrt_network_wait_fd_timeout(h, s->eid, s->fd, 1, h->rw_timeout, &h->interrupt_callback); |
| if (ret) |
| return ret; |
| } |
| |
| ret = srt_sendmsg(s->fd, buf, size, -1, 0); |
| if (ret < 0) { |
| ret = libsrt_neterrno(h); |
| } |
| |
| return ret; |
| } |
| |
| static int libsrt_close(URLContext *h) |
| { |
| SRTContext *s = h->priv_data; |
| |
| srt_close(s->fd); |
| |
| srt_epoll_release(s->eid); |
| |
| srt_cleanup(); |
| |
| return 0; |
| } |
| |
| static int libsrt_get_file_handle(URLContext *h) |
| { |
| SRTContext *s = h->priv_data; |
| return s->fd; |
| } |
| |
| static const AVClass libsrt_class = { |
| .class_name = "libsrt", |
| .item_name = av_default_item_name, |
| .option = libsrt_options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| const URLProtocol ff_libsrt_protocol = { |
| .name = "srt", |
| .url_open = libsrt_open, |
| .url_read = libsrt_read, |
| .url_write = libsrt_write, |
| .url_close = libsrt_close, |
| .url_get_file_handle = libsrt_get_file_handle, |
| .priv_data_size = sizeof(SRTContext), |
| .flags = URL_PROTOCOL_FLAG_NETWORK, |
| .priv_data_class = &libsrt_class, |
| }; |
