From patchwork Tue Oct 10 06:29:12 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nablet Developer X-Patchwork-Id: 5512 Delivered-To: ffmpegpatchwork@gmail.com Received: by 10.2.161.90 with SMTP id m26csp3487005jah; Mon, 9 Oct 2017 23:29:26 -0700 (PDT) X-Google-Smtp-Source: AOwi7QAYGIVKei/eX3h8NFPCVHOXYbvpouH4xaH5az5nywzL1kqzwSDbjLGimN7d/LmGNyofdIB+ X-Received: by 10.223.143.105 with SMTP id p96mr12242902wrb.266.1507616966287; Mon, 09 Oct 2017 23:29:26 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1507616966; cv=none; d=google.com; s=arc-20160816; b=E7MbJG9RYgUCd0ocaesaDJe6TIzFFO2ueqYysY9schoUV5Dhj9UO/iY3glly8D3CNE sbXs43wkGhTOrL+GAWBZquOXMJHf7L2WeBdIU1MeyF6L9Etog2oNIzP1ZzaY0u1SDOrv LbqFQ82JnA9XEOJnt4aoNEASTEHC7jmR7vXQRnO3czf7SksDi11u9KMN82/32HrfcNlN 1MfvJVOgljIuXBUX0R77t0/g6bKJte7rdhiU8LWSeDxDxDppOTVb5HD2ICTSdK2xFhyW ZMaAa39wypZuXjSNi09w7hxUrhk0csuCAmOxQyRh1TZNX7j5FRAWeUhz3vzSbj2jKKgq a4xw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:content-transfer-encoding:mime-version:cc:reply-to :list-subscribe:list-help:list-post:list-archive:list-unsubscribe :list-id:precedence:subject:message-id:date:to:from:delivered-to :arc-authentication-results; bh=jcpLWtgDZYQyyXKYjeUmPGTTKrv4tHRYk7B1aCaPC+8=; b=YrzueHSh96KB4ZEADq3meRGLPxSTJ2vri/ree23HYa0u9wHN9OJoS5LR3qUj1RDXP4 wVvmiv2GkOz3Pe9amGTw4wb0uqrVFPHHhYsw1sDlQF1FfZ2nkUDMaHxp/PeC/969cp7y ZC9A+mazb0iube+4Mpmvqdzm1i48yu7XEY/04WgpoJpE3mkPhAbyOYuiSDHOyEAo2M/e IwhYLKTQ6OhPppCflsUGX2ICWbXXX1MaK/FPh82prsVY9POZcWBv6WaCBepwp/ZiBHzR 05zQ/jlgMED2V61Mr0uki/wqwtwTWy0TD0D/McqQnpnC7OJCw0VQbrGIU0rYnvkr+WiC Odrg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org. [79.124.17.100]) by mx.google.com with ESMTP id v64si1866616wrc.287.2017.10.09.23.29.25; Mon, 09 Oct 2017 23:29:26 -0700 (PDT) Received-SPF: pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) client-ip=79.124.17.100; Authentication-Results: mx.google.com; spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 9570C6882A4; Tue, 10 Oct 2017 09:29:19 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.130]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 2D95F680B0F for ; Tue, 10 Oct 2017 09:29:17 +0300 (EEST) Received: from ubuntu-server.internal.divx.com ([91.216.211.197]) by mrelayeu.kundenserver.de (mreue007 [212.227.15.167]) with ESMTPSA (Nemesis) id 0LxHg6-1dDnu81hUI-0170AK; Tue, 10 Oct 2017 08:29:18 +0200 From: Nablet Developer To: ffmpeg-devel@ffmpeg.org Date: Tue, 10 Oct 2017 13:29:12 +0700 Message-Id: <1507616952-26092-1-git-send-email-sdk@nablet.com> X-Mailer: git-send-email 2.7.4 X-Provags-ID: V03:K0:6UaDLptyNBfGEQ19iRWULV2dyf4R0tWAbT/9A8BILv53OFUb45I mIpZO/FhANqs9WMlWRoyYoMWFhN9F0LBdMaR0aHwd2k/QAgAg+J5yGj4nzy2SVI65MYK1P3 bSP9+smDOH0jnWxRgOBgm5Nsf07rP6t+YExQ5KDNvKaOtG5snUwZYD4WLF8JtmkOeBAbKQz YA37VpKXu9sj+19r9YRGQ== X-UI-Out-Filterresults: notjunk:1; V01:K0:Hz4kRTW4XDI=:bgQgwZiU2dcfgZPVc+Rk3W fRhKy3FCG6SOAdfh94Es+VB3o98xB/YQSG5vS+chtWRcIIbb1vmNVUoT/bR7M9DMglfcfTPJV 40mZG6B+pE3tamXO94BRlNFQ/+akRGeMvEKchWUn8cDWcFDmLFS7Dv7hntu0Z8EtLKuNlJg3T bF4AVByhZr8rHTd4muOHbbd5mMcVuEnglUU6z35dRQTRQxa/PQC+GUUoYHzIU0QxdS3uMOlyw ruBzU0WYsWkdABQYNiL2Hc+IwG7cG2WfpP/CYYP8grnMfu5KCtRozZJWwdBCwOrqq6CB23/7K pC8zFf33vIS9YXrVQKJwZ1rvW8gR1I/O+rjEOJLwPr3M+GCSNA+xQ+NK/hz2GD5URhs0iBhov Yk1FtQuK9PPlqCB8Z+aAc95KG5vOriXvNwkwZgEtxpo9/LHFVSbQO2ctQ4r9UgGiUp96+JnI1 ScIVdmQjsPgeO6qQVXY0/S2uFiUGpKdtCiwWC/laMcQ9WJ1zs9oHaU2OBLTnkG4+BCxI9Cx2H D6fWkA6Tjrw/ded9qcBN2MheKwNu/MBuDk7HqMoMhEYEcKqWS/XGsGGKHqUucbPrnjYmNktvX fBe2lvZbQE1d70zqQcmLSIm7L5c4+3+OyU+0BOaKHMYi3f0FRXpJxBp0tTWB5INJFUJFNo9zB tiD2H2erOsxJemM5KDYrq3s+xGIZtDunRf9Spcekun5eB2FNRTX0ZxpVX3/V5E6VYSD87Y3Kd 5bip3tBZfPCRBTSsagPHEyqpqN0bVncUAhOYUw== Subject: [FFmpeg-devel] [PATCH] avformat/srt: add Haivision Open SRT protocol X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Cc: Nablet Developer MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" protocol requires libsrt (https://github.com/Haivision/srt) to be installed Signed-off-by: Nablet Developer --- configure | 5 + libavformat/Makefile | 1 + libavformat/opensrt.c | 1105 +++++++++++++++++++++++++++++++++++++++++++++++ libavformat/protocols.c | 1 + libavformat/url.h | 4 + 5 files changed, 1116 insertions(+) create mode 100644 libavformat/opensrt.c diff --git a/configure b/configure index 391c141..312c632 100755 --- a/configure +++ b/configure @@ -293,6 +293,7 @@ External library support: --enable-opengl enable OpenGL rendering [no] --enable-openssl enable openssl, needed for https support if gnutls is not used [no] + --enable-opensrt enable Haivision Open SRT protoco [no] --disable-sndio disable sndio support [autodetect] --disable-schannel disable SChannel SSP, needed for TLS support on Windows if openssl and gnutls are not used [autodetect] @@ -1638,6 +1639,7 @@ EXTERNAL_LIBRARY_LIST=" openal opencl opengl + opensrt " HWACCEL_AUTODETECT_LIBRARY_LIST=" @@ -3144,6 +3146,8 @@ libsmbclient_protocol_deps="libsmbclient gplv3" libssh_protocol_deps="libssh" mmsh_protocol_select="http_protocol" mmst_protocol_select="network" +opensrt_protocol_select="network" +opensrt_protocol_deps="opensrt" rtmp_protocol_conflict="librtmp_protocol" rtmp_protocol_select="tcp_protocol" rtmpe_protocol_select="ffrtmpcrypt_protocol" @@ -6063,6 +6067,7 @@ enabled omx_rpi && { check_header OMX_Core.h || { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } || die "ERROR: OpenMAX IL headers not found"; } enabled omx && require_header OMX_Core.h +enabled opensrt && require_pkg_config libsrt srt srt/srt.h srt_socket enabled openssl && { use_pkg_config openssl openssl openssl/ssl.h OPENSSL_init_ssl || use_pkg_config openssl openssl openssl/ssl.h SSL_library_init || check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto || diff --git a/libavformat/Makefile b/libavformat/Makefile index df709c29..a3cbb4e 100644 --- a/libavformat/Makefile +++ b/libavformat/Makefile @@ -593,6 +593,7 @@ OBJS-$(CONFIG_TLS_SCHANNEL_PROTOCOL) += tls_schannel.o tls.o OBJS-$(CONFIG_TLS_SECURETRANSPORT_PROTOCOL) += tls_securetransport.o tls.o OBJS-$(CONFIG_UDP_PROTOCOL) += udp.o OBJS-$(CONFIG_UDPLITE_PROTOCOL) += udp.o +OBJS-$(CONFIG_OPENSRT_PROTOCOL) += opensrt.o OBJS-$(CONFIG_UNIX_PROTOCOL) += unix.o # libavdevice dependencies diff --git a/libavformat/opensrt.c b/libavformat/opensrt.c new file mode 100644 index 0000000..6483942 --- /dev/null +++ b/libavformat/opensrt.c @@ -0,0 +1,1105 @@ +/* + * 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 + */ + +#define _DEFAULT_SOURCE +#define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */ + +#include "avformat.h" +#include "avio_internal.h" +#include "libavutil/avassert.h" +#include "libavutil/parseutils.h" +#include "libavutil/fifo.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/avstring.h" +#include "libavutil/opt.h" +#include "libavutil/log.h" +#include "libavutil/time.h" +#include "internal.h" +#include "network.h" +#include "os_support.h" +#include "url.h" + +#ifdef __APPLE__ +#include "TargetConditionals.h" +#endif + +#include +#include + + +#if HAVE_PTHREAD_CANCEL +#include +#endif + +#ifndef HAVE_PTHREAD_CANCEL +#define HAVE_PTHREAD_CANCEL 0 +#endif + +#ifndef IPV6_ADD_MEMBERSHIP +#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP +#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP +#endif + +#define UDP_TX_BUF_SIZE 32768 +#define UDP_MAX_PKT_SIZE 65536 +#define UDP_HEADER_SIZE 8 + +typedef struct SRTContext { + const AVClass *class; + SRTSOCKET srt_fd; + int buffer_size; + int pkt_size; + int local_port; + int reuse_socket; + int overrun_nonfatal; + struct sockaddr_storage dest_addr; + int dest_addr_len; + int is_connected; + + /* Circular Buffer variables for use in UDP receive code */ + int circular_buffer_size; + AVFifoBuffer *fifo; + int circular_buffer_error; + int64_t bitrate; /* number of bits to send per second */ + int64_t burst_bits; + int close_req; +#if HAVE_PTHREAD_CANCEL + pthread_t circular_buffer_thread; + pthread_mutex_t mutex; + pthread_cond_t cond; + int thread_started; +#endif + uint8_t tmp[UDP_MAX_PKT_SIZE+4]; + int remaining_in_dg; + char *localaddr; + int timeout; + const char *sources; + char *block; + + /* SRT socket options (srt/srt.h) */ + int64_t maxbw; + int pbkeylen; + char passphrase[65]; + int mss; + int fc; + int ipttl; + int iptos; + int64_t inputbw; + int64_t oheadbw; + int tsbpddelay; + int tlpktdrop; + int nakreport; + int conntimeo; + int mode; +} SRTContext; + +#define SRT_MODE_CALLER 0 +#define SRT_MODE_LISTENER 1 +#define SRT_MODE_RENDEZVOUS 2 + +#define OFFSET(x) offsetof(SRTContext, x) +#define D AV_OPT_FLAG_DECODING_PARAM +#define E AV_OPT_FLAG_ENCODING_PARAM +static const AVOption options[] = { + { "buffer_size", "System data size (in bytes)", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E }, + { "bitrate", "Bits to send per second", OFFSET(bitrate), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, .flags = E }, + { "burst_bits", "Max length of bursts in bits (when using bitrate)", OFFSET(burst_bits), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, .flags = E }, + { "localport", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, D|E }, + { "local_port", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E }, + { "localaddr", "Local address", OFFSET(localaddr), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E }, + { "pkt_size", "Maximum UDP packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, .flags = D|E }, + { "reuse", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D|E }, + { "reuse_socket", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E }, + { "fifo_size", "set the UDP receiving circular buffer size, expressed as a number of packets with size of 188 bytes", OFFSET(circular_buffer_size), AV_OPT_TYPE_INT, {.i64 = 7*4096}, 0, INT_MAX, D }, + { "overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, D }, + { "timeout", "set raise error timeout (only in read mode)", OFFSET(timeout), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D }, + { "sources", "Source list", OFFSET(sources), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E }, + { "block", "Block list", OFFSET(block), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E }, + + /* SRT socket options (srt/srt.h), see srt/common/socketoptions.hpp */ + { "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 Transfer Unit", OFFSET(mss), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E }, + { "fc", "Flight flag size (window size)", OFFSET(fc), 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, INT_MAX, .flags = D|E }, + { "iptos", "IP Type of Service", OFFSET(iptos), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .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_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E }, + { "tsbpddelay", "TsbPd receiver delay (mSec) to absorb burst of missed packet retransmission", OFFSET(tsbpddelay), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_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 }, + { "conntimeo", "Connect timeout in msec. Ccaller default: 3000, rendezvous (x 10)", OFFSET(conntimeo), 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 }, + { "caller", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRT_MODE_CALLER }, INT_MIN, INT_MAX, .flags = D|E }, + { "listener", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRT_MODE_LISTENER }, INT_MIN, INT_MAX, .flags = D|E }, + { "rendezvous", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = SRT_MODE_RENDEZVOUS }, INT_MIN, INT_MAX, .flags = D|E }, + + { NULL } +}; + +static const AVClass srt_class = { + .class_name = "srt", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + +static int srt_neterrno(void) +{ + int err = 0; + err = srt_getlasterror(NULL); + if (err == SRT_EASYNCRCV) + return AVERROR(EAGAIN); + return err; +} + +static int srt_network_wait_fd(int fd, int write) +{ + SRTSOCKET ready[2]; + int len = 2; + int ret = -1; + int eid = 0; + int modes = write ? SRT_EPOLL_OUT : SRT_EPOLL_IN; + eid = srt_epoll_create(); + if (eid < 0) + return eid; + ret = srt_epoll_add_usock(eid, fd, &modes); + if (ret < 0) { + srt_epoll_release(eid); + return AVERROR(EINVAL); + } + if (write) { + ret = srt_epoll_wait(eid, 0, 0, ready, &len, -1, 0, 0, 0, 0); + } else { + ret = srt_epoll_wait(eid, ready, &len, 0, 0, -1, 0, 0, 0, 0); + } + srt_epoll_release(eid); + return (ret == SRT_ERROR) ? AVERROR(EAGAIN) : 0; +} + +static int srt_socket_nonblock(int socket, int enable) +{ + int error = 0; + error = srt_setsockopt(socket, 0, SRTO_SNDSYN, &enable, sizeof(enable)); + if (error < 0) + return error; + error = srt_setsockopt(socket, 0, SRTO_RCVSYN, &enable, sizeof(enable)); + return error; +} + +static void log_net_error(void *ctx, int level, const char* prefix) +{ + av_log(ctx, level, "%s %s\n", prefix, srt_getlasterror_str()); +} + +static struct addrinfo *srt_resolve_host(URLContext *h, + const char *hostname, int port, + int type, int family, int flags) +{ + struct addrinfo hints = { 0 }, *res = 0; + int error; + char sport[16]; + const char *node = 0, *service = "0"; + + if (port > 0) { + snprintf(sport, sizeof(sport), "%d", port); + service = sport; + } + if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) { + node = hostname; + } + hints.ai_socktype = type; + hints.ai_family = family; + hints.ai_flags = flags; + if ((error = getaddrinfo(node, service, &hints, &res))) { + res = NULL; + av_log(h, AV_LOG_ERROR, "getaddrinfo(%s, %s): %s\n", + node ? node : "unknown", + service, + gai_strerror(error)); + } + + return res; +} + +static int srt_set_url(URLContext *h, + struct sockaddr_storage *addr, + const char *hostname, int port) +{ + struct addrinfo *res0; + int addr_len; + + res0 = srt_resolve_host(h, hostname, port, SOCK_DGRAM, AF_UNSPEC, 0); + if (!res0) return AVERROR(EIO); + memcpy(addr, res0->ai_addr, res0->ai_addrlen); + addr_len = res0->ai_addrlen; + freeaddrinfo(res0); + + return addr_len; +} + +static int srt_socket_create(URLContext *h, struct sockaddr_storage *addr, + socklen_t *addr_len, const char *localaddr) +{ + SRTContext *s = h->priv_data; + int srt_fd = SRT_INVALID_SOCK; + struct addrinfo *res0, *res; + int family = AF_UNSPEC; + + if (((struct sockaddr *) &s->dest_addr)->sa_family) + family = ((struct sockaddr *) &s->dest_addr)->sa_family; + res0 = srt_resolve_host(h, (localaddr && localaddr[0]) ? localaddr : NULL, + s->local_port, + SOCK_DGRAM, family, AI_PASSIVE); + if (!res0) + goto fail; + for (res = res0; res; res=res->ai_next) { + srt_fd = srt_socket(res->ai_family, SOCK_DGRAM, 0); + if (srt_fd != SRT_INVALID_SOCK) break; + log_net_error(NULL, AV_LOG_ERROR, "socket"); + } + + if (srt_fd < 0) + goto fail; + + memcpy(addr, res->ai_addr, res->ai_addrlen); + *addr_len = res->ai_addrlen; + + freeaddrinfo(res0); + + return srt_fd; + + fail: + if (srt_fd >= 0) + srt_close(srt_fd); + if (res0) + freeaddrinfo(res0); + return -1; +} + +static int srt_port(struct sockaddr_storage *addr, int addr_len) +{ + char sbuf[sizeof(int)*3+1]; + int error; + + if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV))) { + av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error)); + return -1; + } + + return strtol(sbuf, NULL, 10); +} + + +/** + * If no filename is given to av_open_input_file because you want to + * get the local port first, then you must call this function to set + * the remote server address. + * + * url syntax: srt://host:port[?option=val...] + * option 'localport=n' : set the local port + * 'pkt_size=n' : set max packet size + * 'reuse=1' : enable reusing the socket + * 'overrun_nonfatal=1': survive in case of circular buffer overrun + * + * @param h media file context + * @param uri of the remote server + * @return zero if no error. + */ +int ff_srt_set_remote_url(URLContext *h, const char *uri) +{ + SRTContext *s = h->priv_data; + char hostname[256], buf[10]; + int port; + const char *p; + + av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); + + /* set the destination address */ + s->dest_addr_len = srt_set_url(h, &s->dest_addr, hostname, port); + if (s->dest_addr_len < 0) { + return AVERROR(EIO); + } + p = strchr(uri, '?'); + if (p) { + if (av_find_info_tag(buf, sizeof(buf), "connect", p)) { + int was_connected = s->is_connected; + s->is_connected = strtol(buf, NULL, 10); + if (s->is_connected && !was_connected) { + if (srt_connect(s->srt_fd, (struct sockaddr *) &s->dest_addr, + s->dest_addr_len)) { + s->is_connected = 0; + log_net_error(h, AV_LOG_ERROR, "connect"); + return AVERROR(EIO); + } + } + } + } + + return 0; +} + +/** + * Return the local port used by the UDP connection + * @param h media file context + * @return the local port number + */ +int ff_srt_get_local_port(URLContext *h) +{ + SRTContext *s = h->priv_data; + return s->local_port; +} + +/** + * Return the srt file handle for select() usage to wait for several RTP + * streams at the same time. + * @param h media file context + */ +static int srt_get_file_handle(URLContext *h) +{ + SRTContext *s = h->priv_data; + return s->srt_fd; +} + +#if HAVE_PTHREAD_CANCEL +static void *circular_buffer_task_rx(void * ctx) +{ + URLContext *h = ctx; + SRTContext *s = h->priv_data; + int old_cancelstate; + + pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); + pthread_mutex_lock(&s->mutex); + if (srt_socket_nonblock(s->srt_fd, 0) < 0) { + av_log(h, AV_LOG_ERROR, "Failed to set blocking mode"); + s->circular_buffer_error = AVERROR(EIO); + goto end; + } + while (1) { + int len; + + pthread_mutex_unlock(&s->mutex); + /* Blocking operations are always cancellation points; + see "General Information" / "Thread Cancelation Overview" + in Single Unix. */ + pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate); + len = srt_recvmsg(s->srt_fd, s->tmp+4, sizeof(s->tmp)-4); + pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); + pthread_mutex_lock(&s->mutex); + if (len < 0) { + + if (srt_neterrno() != AVERROR(EAGAIN) && srt_neterrno() != AVERROR(EINTR)) { + log_net_error(NULL, AV_LOG_ERROR, "srt_recvmsg)"); + s->circular_buffer_error = srt_neterrno(); + goto end; + } + continue; + } + AV_WL32(s->tmp, len); + + if (av_fifo_space(s->fifo) < len + 4) { + /* No Space left */ + if (s->overrun_nonfatal) { + av_log(h, AV_LOG_WARNING, "Circular buffer overrun. " + "Surviving due to overrun_nonfatal option\n"); + continue; + } else { + av_log(h, AV_LOG_ERROR, "Circular buffer overrun. " + "To avoid, increase fifo_size URL option. " + "To survive in such case, use overrun_nonfatal option\n"); + s->circular_buffer_error = AVERROR(EIO); + goto end; + } + } + av_fifo_generic_write(s->fifo, s->tmp, len+4, NULL); + pthread_cond_signal(&s->cond); + } + +end: + pthread_cond_signal(&s->cond); + pthread_mutex_unlock(&s->mutex); + return NULL; +} + +static void *circular_buffer_task_tx(void * ctx) +{ + URLContext *h = ctx; + SRTContext *s = h->priv_data; + int old_cancelstate; + int64_t target_timestamp = av_gettime_relative(); + int64_t start_timestamp = av_gettime_relative(); + int64_t sent_bits = 0; + int64_t burst_interval = s->bitrate ? (s->burst_bits * 1000000 / s->bitrate) : 0; + int64_t max_delay = s->bitrate ? ((int64_t)h->max_packet_size * 8 * 1000000 / s->bitrate + 1) : 0; + + pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); + pthread_mutex_lock(&s->mutex); + + if (srt_socket_nonblock(s->srt_fd, 0) < 0) { + av_log(h, AV_LOG_ERROR, "Failed to set blocking mode"); + s->circular_buffer_error = AVERROR(EIO); + goto end; + } + + while (1) { + int len; + const uint8_t *p; + uint8_t tmp[4]; + int64_t timestamp; + + len=av_fifo_size(s->fifo); + + while (len<4) { + if (s->close_req) + goto end; + if (pthread_cond_wait(&s->cond, &s->mutex) < 0) { + goto end; + } + len=av_fifo_size(s->fifo); + } + + av_fifo_generic_read(s->fifo, tmp, 4, NULL); + len=AV_RL32(tmp); + + av_assert0(len >= 0); + av_assert0(len <= sizeof(s->tmp)); + + av_fifo_generic_read(s->fifo, s->tmp, len, NULL); + + pthread_mutex_unlock(&s->mutex); + pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate); + + if (s->bitrate) { + timestamp = av_gettime_relative(); + if (timestamp < target_timestamp) { + int64_t delay = target_timestamp - timestamp; + if (delay > max_delay) { + delay = max_delay; + start_timestamp = timestamp + delay; + sent_bits = 0; + } + av_usleep(delay); + } else { + if (timestamp - burst_interval > target_timestamp) { + start_timestamp = timestamp - burst_interval; + sent_bits = 0; + } + } + sent_bits += len * 8; + target_timestamp = start_timestamp + sent_bits * 1000000 / s->bitrate; + } + + p = s->tmp; + while (len) { + int ret; + av_assert0(len > 0); + ret = srt_sendmsg(s->srt_fd, p, len, -1, 0); + if (ret >= 0) { + len -= ret; + p += ret; + } else { + ret = srt_neterrno(); + if (ret != AVERROR(EAGAIN) && ret != AVERROR(EINTR)) { + pthread_mutex_lock(&s->mutex); + s->circular_buffer_error = ret; + pthread_mutex_unlock(&s->mutex); + return NULL; + } + } + } + + pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); + pthread_mutex_lock(&s->mutex); + } + +end: + pthread_mutex_unlock(&s->mutex); + return NULL; +} + + +#endif + +static int parse_source_list(char *buf, const char **sources, int *num_sources, + int max_sources) +{ + const char *source_start; + + source_start = buf; + while (1) { + char *next = strchr(source_start, ','); + if (next) + *next = '\0'; + sources[*num_sources] = av_strdup(source_start); + if (!sources[*num_sources]) + return AVERROR(ENOMEM); + source_start = next + 1; + (*num_sources)++; + if (*num_sources >= max_sources || !next) + break; + } + 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 srt_set_options_post(URLContext *h, int srt_fd) +{ + SRTContext *s = h->priv_data; + + if (s->inputbw >= 0 && srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_INPUTBW, &s->inputbw, sizeof(s->inputbw)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_INPUTBW)"); + goto fail; + } + if (s->oheadbw >= 0 && srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_OHEADBW, &s->oheadbw, sizeof(s->oheadbw)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_OHEADBW)"); + goto fail; + } + return 0; +fail: + return AVERROR(EIO); +} + +/* - 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 srt_set_options_pre(URLContext *h, int srt_fd) +{ + SRTContext *s = h->priv_data; + int yes = 1; + + if (s->mode == SRT_MODE_RENDEZVOUS && srt_setsockopt(srt_fd, 0, SRTO_RENDEZVOUS, &yes, sizeof(yes)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_RENDEZVOUS)"); + goto fail; + } + + if (s->maxbw >= 0 && srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_MAXBW, &s->maxbw, sizeof(s->maxbw)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_MAXBW)"); + goto fail; + } + if (s->pbkeylen >= 0 && srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_PBKEYLEN, &s->pbkeylen, sizeof(s->pbkeylen)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_PBKEYLEN)"); + goto fail; + } + if (s->passphrase[0] && srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_PASSPHRASE, &s->passphrase, sizeof(s->passphrase)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_PASSPHRASE)"); + goto fail; + } + if (s->mss >= 0 && srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_MSS, &s->mss, sizeof(s->mss)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_MSS)"); + goto fail; + } + if (s->fc >= 0 && srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_FC, &s->fc, sizeof(s->fc)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_FC)"); + goto fail; + } + if (s->ipttl >= 0 && srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_IPTTL, &s->ipttl, sizeof(s->ipttl)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_IPTTL)"); + goto fail; + } + if (s->iptos >= 0 && srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_IPTOS, &s->iptos, sizeof(s->iptos)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_IPTOS)"); + goto fail; + } + if (s->tsbpddelay >= 0 && srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_TSBPDDELAY, &s->tsbpddelay, sizeof(s->tsbpddelay)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_TSBPDDELAY)"); + goto fail; + } + if (s->tlpktdrop >= 0 && srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_TLPKTDROP, &s->tlpktdrop, sizeof(s->tlpktdrop)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_TLPKTDROP)"); + goto fail; + } + if (s->nakreport >= 0 && srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_NAKREPORT, &s->nakreport, sizeof(s->nakreport)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_NAKREPORT)"); + goto fail; + } + if (s->conntimeo >= 0 && srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_CONNTIMEO, &s->conntimeo, sizeof(s->conntimeo)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SRTO_CONNTIMEO)"); + goto fail; + } + return 0; +fail: + return AVERROR(EIO); +} + +/* put it in UDP context */ +/* return non zero if error */ +static int srt_open(URLContext *h, const char *uri, int flags) +{ + char hostname[1024], localaddr[1024] = ""; + int port, srt_fd = SRT_INVALID_SOCK, tmp, bind_ret = -1; + int listen_fd = SRT_INVALID_SOCK; + SRTContext *s = h->priv_data; + int is_output; + const char *p; + char buf[256]; + struct sockaddr_storage my_addr; + socklen_t len, tmplen; + int i, num_include_sources = 0, num_exclude_sources = 0; + char *include_sources[32], *exclude_sources[32]; + + h->is_streamed = 1; + + is_output = !(flags & AVIO_FLAG_READ); + if (s->buffer_size < 0) + s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE; + + if (s->sources) { + if (parse_source_list(s->sources, include_sources, + &num_include_sources, + FF_ARRAY_ELEMS(include_sources))) + goto fail; + } + + if (s->block) { + if (parse_source_list(s->block, exclude_sources, &num_exclude_sources, + FF_ARRAY_ELEMS(exclude_sources))) + goto fail; + } + + if (s->pkt_size > 0) + h->max_packet_size = s->pkt_size; + + p = strchr(uri, '?'); + if (p) { + if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) { + char *endptr = NULL; + s->reuse_socket = strtol(buf, &endptr, 10); + /* assume if no digits were found it is a request to enable it */ + if (buf == endptr) + s->reuse_socket = 1; + } + if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) { + char *endptr = NULL; + s->overrun_nonfatal = strtol(buf, &endptr, 10); + /* assume if no digits were found it is a request to enable it */ + if (buf == endptr) + s->overrun_nonfatal = 1; + if (!HAVE_PTHREAD_CANCEL) + av_log(h, AV_LOG_WARNING, + "'overrun_nonfatal' option was set but it is not supported " + "on this build (pthread support is required)\n"); + } + if (av_find_info_tag(buf, sizeof(buf), "localport", p)) { + s->local_port = strtol(buf, NULL, 10); + } + if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) { + s->pkt_size = strtol(buf, NULL, 10); + } + if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) { + s->buffer_size = strtol(buf, NULL, 10); + } + s->is_connected = 1; + if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) { + s->circular_buffer_size = strtol(buf, NULL, 10); + if (!HAVE_PTHREAD_CANCEL) + av_log(h, AV_LOG_WARNING, + "'circular_buffer_size' option was set but it is not supported " + "on this build (pthread support is required)\n"); + } + if (av_find_info_tag(buf, sizeof(buf), "bitrate", p)) { + s->bitrate = strtoll(buf, NULL, 10); + if (!HAVE_PTHREAD_CANCEL) + av_log(h, AV_LOG_WARNING, + "'bitrate' option was set but it is not supported " + "on this build (pthread support is required)\n"); + } + if (av_find_info_tag(buf, sizeof(buf), "burst_bits", p)) { + s->burst_bits = strtoll(buf, NULL, 10); + } + if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) { + av_strlcpy(localaddr, buf, sizeof(localaddr)); + } + if (av_find_info_tag(buf, sizeof(buf), "sources", p)) { + if (parse_source_list(buf, include_sources, &num_include_sources, + FF_ARRAY_ELEMS(include_sources))) + goto fail; + } + if (av_find_info_tag(buf, sizeof(buf), "block", p)) { + if (parse_source_list(buf, exclude_sources, &num_exclude_sources, + FF_ARRAY_ELEMS(exclude_sources))) + goto fail; + } + if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p)) + s->timeout = strtol(buf, NULL, 10); + + /* SRT options (srt/srt.h) */ + if (av_find_info_tag(buf, sizeof(buf), "maxbw", p)) { + s->maxbw = strtoll(buf, NULL, 10); + } + 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)) { + av_strlcpy(s->passphrase, buf, sizeof(s->passphrase)); + } + if (av_find_info_tag(buf, sizeof(buf), "mss", p)) { + s->mss = strtol(buf, NULL, 10); + } + if (av_find_info_tag(buf, sizeof(buf), "fc", p)) { + s->fc = 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), "tsbpddelay", p)) { + s->tsbpddelay = 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), "conntimeo", p)) { + s->conntimeo = 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; + } + } + } + /* handling needed to support options picking from both AVOption and URL */ + s->circular_buffer_size *= 188; + if (flags & AVIO_FLAG_WRITE) { + h->max_packet_size = s->pkt_size; + } else { + h->max_packet_size = UDP_MAX_PKT_SIZE; + } + h->rw_timeout = s->timeout; + + /* fill the dest addr */ + av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); + + /* XXX: fix av_url_split */ + if (hostname[0] == '\0' || hostname[0] == '?') { + /* only accepts null hostname if input */ + if (!(flags & AVIO_FLAG_READ)) + goto fail; + } else { + if (ff_srt_set_remote_url(h, uri) < 0) + goto fail; + } + + if ((s->local_port <= 0) && (h->flags & AVIO_FLAG_READ)) + s->local_port = port; + + if (localaddr[0]) { + srt_fd = srt_socket_create(h, &my_addr, &len, localaddr); + } else { + srt_fd = srt_socket_create(h, &my_addr, &len, s->localaddr); + } + if (srt_fd < 0) + goto fail; + + + if (srt_set_options_pre(h, srt_fd) < 0) + goto fail; + + /* Follow the requested reuse option */ + if (s->reuse_socket > 0) { + s->reuse_socket = 1; + if (srt_setsockopt (srt_fd, SOL_SOCKET, SRTO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket))) + goto fail; + } + if (is_output) { + /* limit the tx buf size to limit latency */ + tmp = s->buffer_size; + if (srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_SNDBUF, &tmp, sizeof(tmp)) < 0) { + log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)"); + goto fail; + } + } else { + /* set srt recv buffer size to the requested value (default 64K) */ + tmp = s->buffer_size; + if (srt_setsockopt(srt_fd, SOL_SOCKET, SRTO_RCVBUF, &tmp, sizeof(tmp)) < 0) { + log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)"); + } + tmplen = sizeof(tmp); + if (srt_getsockopt(srt_fd, SOL_SOCKET, SRTO_RCVBUF, &tmp, &tmplen) < 0) { + log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)"); + } else { + av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp); + if (tmp < s->buffer_size) + av_log(h, AV_LOG_WARNING, "attempted to set receive buffer to size %d but it only ended up set as %d", s->buffer_size, tmp); + } + + /* make the socket non-blocking */ + srt_socket_nonblock(srt_fd, 1); + } + /* the bind is needed to give a port to the socket now */ + if (bind_ret < 0 && srt_bind(srt_fd,(struct sockaddr *)&my_addr, len) < 0) { + log_net_error(h, AV_LOG_ERROR, "bind failed"); + goto fail; + } + + if (s->mode == SRT_MODE_LISTENER) { + listen_fd = srt_fd; + srt_fd = SRT_INVALID_SOCK; + + if (srt_listen(listen_fd, 1)) + goto fail; + srt_fd = srt_accept(listen_fd, NULL, NULL); + if (srt_fd == SRT_INVALID_SOCK) + goto fail; + } + + len = sizeof(my_addr); + srt_getsockname(srt_fd, (struct sockaddr *)&my_addr, &len); + s->local_port = srt_port(&my_addr, len); + + if (s->mode != SRT_MODE_LISTENER) { + if (srt_connect(srt_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) { + log_net_error(h, AV_LOG_ERROR, "connect"); + goto fail; + } + } + if (srt_set_options_post(h, srt_fd) < 0) + goto fail; + + for (i = 0; i < num_include_sources; i++) + av_freep(&include_sources[i]); + for (i = 0; i < num_exclude_sources; i++) + av_freep(&exclude_sources[i]); + + s->srt_fd = srt_fd; + +#if HAVE_PTHREAD_CANCEL + /* + Create thread in case of: + 1. Input and circular_buffer_size is set + 2. Output and bitrate and circular_buffer_size is set + */ + + if (is_output && s->bitrate && !s->circular_buffer_size) { + /* Warn user in case of 'circular_buffer_size' is not set */ + av_log(h, AV_LOG_WARNING,"'bitrate' option was set but 'circular_buffer_size' is not, but required\n"); + } + + if ((!is_output && s->circular_buffer_size) || (is_output && s->bitrate && s->circular_buffer_size)) { + int ret; + + /* start the task going */ + s->fifo = av_fifo_alloc(s->circular_buffer_size); + ret = pthread_mutex_init(&s->mutex, NULL); + if (ret) { + av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret)); + goto fail; + } + ret = pthread_cond_init(&s->cond, NULL); + if (ret) { + av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret)); + goto cond_fail; + } + ret = pthread_create(&s->circular_buffer_thread, NULL, is_output?circular_buffer_task_tx:circular_buffer_task_rx, h); + if (ret) { + av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret)); + goto thread_fail; + } + s->thread_started = 1; + } +#endif + + return 0; +#if HAVE_PTHREAD_CANCEL + thread_fail: + pthread_cond_destroy(&s->cond); + cond_fail: + pthread_mutex_destroy(&s->mutex); +#endif + fail: + if (srt_fd >= 0) + srt_close(srt_fd); + av_fifo_freep(&s->fifo); + for (i = 0; i < num_include_sources; i++) + av_freep(&include_sources[i]); + for (i = 0; i < num_exclude_sources; i++) + av_freep(&exclude_sources[i]); + return AVERROR(EIO); +} + +static int srt_read(URLContext *h, uint8_t *buf, int size) +{ + SRTContext *s = h->priv_data; + int ret; +#if HAVE_PTHREAD_CANCEL + int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK; + + if (s->fifo) { + pthread_mutex_lock(&s->mutex); + do { + avail = av_fifo_size(s->fifo); + if (avail) { + uint8_t tmp[4]; + + av_fifo_generic_read(s->fifo, tmp, 4, NULL); + avail= AV_RL32(tmp); + if (avail > size){ + av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n"); + avail= size; + } + + av_fifo_generic_read(s->fifo, buf, avail, NULL); + av_fifo_drain(s->fifo, AV_RL32(tmp) - avail); + pthread_mutex_unlock(&s->mutex); + return avail; + } else if (s->circular_buffer_error){ + int err = s->circular_buffer_error; + pthread_mutex_unlock(&s->mutex); + return err; + } else if (nonblock) { + pthread_mutex_unlock(&s->mutex); + return AVERROR(EAGAIN); + } else { + /* FIXME: using the monotonic clock would be better, + but it does not exist on all supported platforms. */ + int64_t t = av_gettime() + 100000; + struct timespec tv = { .tv_sec = t / 1000000, + .tv_nsec = (t % 1000000) * 1000 }; + if (pthread_cond_timedwait(&s->cond, &s->mutex, &tv) < 0) { + pthread_mutex_unlock(&s->mutex); + return AVERROR(errno == ETIMEDOUT ? EAGAIN : errno); + } + nonblock = 1; + } + } while (1); + } +#endif + + if (!(h->flags & AVIO_FLAG_NONBLOCK)) { + ret = srt_network_wait_fd(s->srt_fd, 0); + if (ret < 0) + return ret; + } + ret = srt_recvmsg(s->srt_fd, buf, size); + + return ret < 0 ? srt_neterrno() : ret; +} + +static int srt_write(URLContext *h, const uint8_t *buf, int size) +{ + SRTContext *s = h->priv_data; + int ret; + +#if HAVE_PTHREAD_CANCEL + if (s->fifo) { + uint8_t tmp[4]; + + pthread_mutex_lock(&s->mutex); + + /* + Return error if last tx failed. + Here we can't know on which packet error was, but it needs to know that error exists. + */ + if (s->circular_buffer_error<0) { + int err=s->circular_buffer_error; + pthread_mutex_unlock(&s->mutex); + return err; + } + + if (av_fifo_space(s->fifo) < size + 4) { + /* What about a partial packet tx ? */ + pthread_mutex_unlock(&s->mutex); + return AVERROR(ENOMEM); + } + AV_WL32(tmp, size); + av_fifo_generic_write(s->fifo, tmp, 4, NULL); /* size of packet */ + av_fifo_generic_write(s->fifo, (uint8_t *)buf, size, NULL); /* the data */ + pthread_cond_signal(&s->cond); + pthread_mutex_unlock(&s->mutex); + return size; + } +#endif + if (!(h->flags & AVIO_FLAG_NONBLOCK)) { + ret = srt_network_wait_fd(s->srt_fd, 1); + if (ret < 0) + return ret; + } + + ret = srt_sendmsg(s->srt_fd, buf, size, -1, 0); + + return ret < 0 ? srt_neterrno() : ret; +} + +/* use different name to avoid conflict with srt_close from srt/srt.h */ +static int do_srt_close(URLContext *h) +{ + SRTContext *s = h->priv_data; + +#if HAVE_PTHREAD_CANCEL + /* Request close once writing is finished */ + if (s->thread_started && !(h->flags & AVIO_FLAG_READ)) { + pthread_mutex_lock(&s->mutex); + s->close_req = 1; + pthread_cond_signal(&s->cond); + pthread_mutex_unlock(&s->mutex); + } +#endif + +#if HAVE_PTHREAD_CANCEL + if (s->thread_started) { + int ret; + /* Cancel only read, as write has been signaled as success to the user */ + if (h->flags & AVIO_FLAG_READ) + pthread_cancel(s->circular_buffer_thread); + ret = pthread_join(s->circular_buffer_thread, NULL); + if (ret) + av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret)); + pthread_mutex_destroy(&s->mutex); + pthread_cond_destroy(&s->cond); + } +#endif + srt_close(s->srt_fd); + av_fifo_freep(&s->fifo); + return 0; +} + +const URLProtocol ff_opensrt_protocol = { + .name = "srt", + .url_open = srt_open, + .url_read = srt_read, + .url_write = srt_write, + .url_close = do_srt_close, + .url_get_file_handle = srt_get_file_handle, + .priv_data_size = sizeof(SRTContext), + .priv_data_class = &srt_class, + .flags = URL_PROTOCOL_FLAG_NETWORK, +}; + diff --git a/libavformat/protocols.c b/libavformat/protocols.c index 8d3555e..f8f65cf 100644 --- a/libavformat/protocols.c +++ b/libavformat/protocols.c @@ -62,6 +62,7 @@ extern const URLProtocol ff_tls_securetransport_protocol; extern const URLProtocol ff_tls_openssl_protocol; extern const URLProtocol ff_udp_protocol; extern const URLProtocol ff_udplite_protocol; +extern const URLProtocol ff_opensrt_protocol; extern const URLProtocol ff_unix_protocol; extern const URLProtocol ff_librtmp_protocol; extern const URLProtocol ff_librtmpe_protocol; diff --git a/libavformat/url.h b/libavformat/url.h index 4750bff..d6e034e 100644 --- a/libavformat/url.h +++ b/libavformat/url.h @@ -279,6 +279,10 @@ int ff_check_interrupt(AVIOInterruptCB *cb); int ff_udp_set_remote_url(URLContext *h, const char *uri); int ff_udp_get_local_port(URLContext *h); +/* srt.c */ +int ff_srt_set_remote_url(URLContext *h, const char *uri); +int ff_srt_get_local_port(URLContext *h); + /** * Assemble a URL string from components. This is the reverse operation * of av_url_split.