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gstreamer/subprojects/gst-plugins-bad/ext/srt/gstsrtobject.c
Jan Alexander Steffens (heftig) 565f9d18ae srt: Always format reject reason code 
`srt_rejectreason_str` doesn't give us a unique string for every
possible reason. Peers can define their own reasons and SRT just gives
us the string `"Application-defined rejection reason"` for all of them.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4948>
2023-07-02 13:36:42 +00:00

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/* GStreamer
* Copyright (C) 2018, Collabora Ltd.
* Copyright (C) 2018, SK Telecom, Co., Ltd.
* Author: Jeongseok Kim <jeongseok.kim@sk.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/* Needed for GValueArray */
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#include "gstsrtobject.h"
#include <gst/base/gstbasesink.h>
#include <gio/gnetworking.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdint.h>
GST_DEBUG_CATEGORY_EXTERN (gst_debug_srtobject);
#define GST_CAT_DEFAULT gst_debug_srtobject
#define ERROR_TO_WARNING(srtobject, error, suffix) \
G_STMT_START { \
gchar *text; \
g_assert (error); \
text = g_strdup_printf ("%s%s", (error)->message, (suffix)); \
GST_WARNING_OBJECT ((srtobject)->element, "warning: %s", text); \
gst_element_message_full ((srtobject)->element, GST_MESSAGE_WARNING, \
(error)->domain, (error)->code, text, NULL, __FILE__, GST_FUNCTION, \
__LINE__); \
} G_STMT_END
#if SRT_VERSION_VALUE > 0x10402
#define REASON_FORMAT "s (%d)"
#define REASON_ARGS(reason) srt_rejectreason_str (reason), (reason)
#else
/* srt_rejectreason_str() is unavailable in libsrt 1.4.2 and prior due to
* unexported symbol. See https://github.com/Haivision/srt/pull/1728. */
#define REASON_FORMAT "s %d"
#define REASON_ARGS(reason) "reject reason code", (reason)
#endif
/* Define options added in later revisions */
#if SRT_VERSION_VALUE < 0x10402
#define SRTO_DRIFTTRACER 37
/* We can't define SRTO_BINDTODEVICE since it depends on configuration flags *sigh* */
#define SRTO_RETRANSMITALGO 61
#endif
enum
{
PROP_URI = 1,
PROP_MODE,
PROP_LOCALADDRESS,
PROP_LOCALPORT,
PROP_PASSPHRASE,
PROP_PBKEYLEN,
PROP_POLL_TIMEOUT,
PROP_LATENCY,
PROP_MSG_SIZE,
PROP_STATS,
PROP_WAIT_FOR_CONNECTION,
PROP_STREAMID,
PROP_AUTHENTICATION,
PROP_AUTO_RECONNECT,
PROP_LAST
};
typedef struct
{
SRTSOCKET sock;
gint poll_id;
GSocketAddress *sockaddr;
gboolean sent_headers;
} SRTCaller;
static SRTCaller *
srt_caller_new (void)
{
SRTCaller *caller = g_new0 (SRTCaller, 1);
caller->sock = SRT_INVALID_SOCK;
caller->poll_id = SRT_ERROR;
caller->sent_headers = FALSE;
return caller;
}
static void
srt_caller_free (SRTCaller * caller)
{
g_return_if_fail (caller != NULL);
g_clear_object (&caller->sockaddr);
if (caller->sock != SRT_INVALID_SOCK) {
srt_close (caller->sock);
}
if (caller->poll_id != SRT_ERROR) {
srt_epoll_release (caller->poll_id);
}
g_free (caller);
}
/* called with sock_lock */
static void
srt_caller_signal_removed (SRTCaller * caller, GstSRTObject * srtobject)
{
g_signal_emit_by_name (srtobject->element, "caller-removed", 0,
caller->sockaddr);
}
struct srt_constant_params
{
const gchar *name;
SRT_SOCKOPT param;
const void *val;
int val_len;
};
static const bool bool_false = false;
static const bool bool_true = true;
static const struct linger no_linger = { 0, 0 };
/* *INDENT-OFF* */
static const struct srt_constant_params srt_params[] = {
{"SRTO_SNDSYN", SRTO_SNDSYN, &bool_false, sizeof bool_false}, /* non-blocking */
{"SRTO_RCVSYN", SRTO_RCVSYN, &bool_false, sizeof bool_false}, /* non-blocking */
{"SRTO_LINGER", SRTO_LINGER, &no_linger, sizeof no_linger}, /* no linger time */
{"SRTO_TSBPDMODE", SRTO_TSBPDMODE, &bool_true, sizeof bool_true}, /* Timestamp-based Packet Delivery mode must be enabled */
{NULL, -1, NULL, 0},
};
/* *INDENT-ON* */
typedef struct
{
const gchar *name;
SRT_SOCKOPT opt;
GType gtype;
} SrtOption;
SrtOption srt_options[] = {
{"mss", SRTO_MSS, G_TYPE_INT},
{"fc", SRTO_FC, G_TYPE_INT},
{"sndbuf", SRTO_SNDBUF, G_TYPE_INT},
{"rcvbuf", SRTO_RCVBUF, G_TYPE_INT},
{"maxbw", SRTO_MAXBW, G_TYPE_INT64},
{"tsbpdmode", SRTO_TSBPDMODE, G_TYPE_BOOLEAN},
{"latency", SRTO_LATENCY, G_TYPE_INT},
{"inputbw", SRTO_INPUTBW, G_TYPE_INT64},
{"oheadbw", SRTO_OHEADBW, G_TYPE_INT},
{"passphrase", SRTO_PASSPHRASE, G_TYPE_STRING},
{"pbkeylen", SRTO_PBKEYLEN, G_TYPE_INT},
{"ipttl", SRTO_IPTTL, G_TYPE_INT},
{"iptos", SRTO_IPTOS, G_TYPE_INT},
{"tlpktdrop", SRTO_TLPKTDROP, G_TYPE_BOOLEAN},
{"snddropdelay", SRTO_SNDDROPDELAY, G_TYPE_INT},
{"nakreport", SRTO_NAKREPORT, G_TYPE_BOOLEAN},
{"conntimeo", SRTO_CONNTIMEO, G_TYPE_INT},
{"drifttracer", SRTO_DRIFTTRACER, G_TYPE_BOOLEAN},
{"lossmaxttl", SRTO_LOSSMAXTTL, G_TYPE_INT},
{"rcvlatency", SRTO_RCVLATENCY, G_TYPE_INT},
{"peerlatency", SRTO_PEERLATENCY, G_TYPE_INT},
{"minversion", SRTO_MINVERSION, G_TYPE_INT},
{"streamid", SRTO_STREAMID, G_TYPE_STRING},
{"congestion", SRTO_CONGESTION, G_TYPE_STRING},
{"messageapi", SRTO_MESSAGEAPI, G_TYPE_BOOLEAN},
{"payloadsize", SRTO_PAYLOADSIZE, G_TYPE_INT},
{"transtype", SRTO_TRANSTYPE, G_TYPE_INT},
{"kmrefreshrate", SRTO_KMREFRESHRATE, G_TYPE_INT},
{"kmpreannounce", SRTO_KMPREANNOUNCE, G_TYPE_INT},
{"enforcedencryption", SRTO_ENFORCEDENCRYPTION, G_TYPE_BOOLEAN},
{"ipv6only", SRTO_IPV6ONLY, G_TYPE_INT},
{"peeridletimeo", SRTO_PEERIDLETIMEO, G_TYPE_INT},
#if SRT_VERSION_VALUE >= 0x10402
{"bindtodevice", SRTO_BINDTODEVICE, G_TYPE_STRING},
#endif
{"packetfilter", SRTO_PACKETFILTER, G_TYPE_STRING},
{"retransmitalgo", SRTO_RETRANSMITALGO, G_TYPE_INT},
{NULL}
};
static gint srt_init_refcount = 0;
static GSocketAddress *
gst_srt_object_resolve (GstSRTObject * srtobject, const gchar * address,
guint port, GError ** err_out)
{
GError *err = NULL;
GSocketAddress *saddr;
GResolver *resolver;
saddr = g_inet_socket_address_new_from_string (address, port);
if (!saddr) {
GList *results;
GST_DEBUG_OBJECT (srtobject->element, "resolving IP address for host %s",
address);
resolver = g_resolver_get_default ();
results =
g_resolver_lookup_by_name (resolver, address, srtobject->cancellable,
&err);
if (!results)
goto name_resolve;
saddr = g_inet_socket_address_new (G_INET_ADDRESS (results->data), port);
g_resolver_free_addresses (results);
g_object_unref (resolver);
}
#ifndef GST_DISABLE_GST_DEBUG
{
gchar *ip =
g_inet_address_to_string (g_inet_socket_address_get_address
(G_INET_SOCKET_ADDRESS (saddr)));
GST_DEBUG_OBJECT (srtobject->element, "IP address for host %s is %s",
address, ip);
g_free (ip);
}
#endif
return saddr;
name_resolve:
{
GST_WARNING_OBJECT (srtobject->element, "Failed to resolve %s: %s", address,
err->message);
g_set_error (err_out, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_OPEN_READ,
"Failed to resolve host '%s': %s", address, err->message);
g_clear_error (&err);
g_object_unref (resolver);
return NULL;
}
}
static gboolean
gst_srt_object_apply_socket_option (SRTSOCKET sock, SrtOption * option,
const GValue * value, GError ** error)
{
union
{
int32_t i;
int64_t i64;
gboolean b;
const gchar *c;
} u;
const void *optval = &u;
gint optlen;
if (!G_VALUE_HOLDS (value, option->gtype)) {
goto bad_type;
}
switch (option->gtype) {
case G_TYPE_INT:
u.i = g_value_get_int (value);
optlen = sizeof u.i;
break;
case G_TYPE_INT64:
u.i64 = g_value_get_int64 (value);
optlen = sizeof u.i64;
break;
case G_TYPE_BOOLEAN:
u.b = g_value_get_boolean (value);
optlen = sizeof u.b;
break;
case G_TYPE_STRING:
u.c = g_value_get_string (value);
optval = u.c;
optlen = u.c ? strlen (u.c) : 0;
if (optlen == 0) {
return TRUE;
}
break;
default:
goto bad_type;
}
if (srt_setsockopt (sock, 0, option->opt, optval, optlen)) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS,
"failed to set %s (reason: %s)", option->name, srt_getlasterror_str ());
return FALSE;
}
return TRUE;
bad_type:
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS,
"option %s has unsupported type", option->name);
return FALSE;
}
static gboolean
gst_srt_object_set_common_params (SRTSOCKET sock, GstSRTObject * srtobject,
GError ** error)
{
const struct srt_constant_params *params = srt_params;
SrtOption *option = srt_options;
GST_OBJECT_LOCK (srtobject->element);
for (; params->name != NULL; params++) {
if (srt_setsockopt (sock, 0, params->param, params->val, params->val_len)) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS,
"failed to set %s (reason: %s)", params->name,
srt_getlasterror_str ());
goto err;
}
}
for (; option->name; ++option) {
const GValue *val;
val = gst_structure_get_value (srtobject->parameters, option->name);
if (val && !gst_srt_object_apply_socket_option (sock, option, val, error)) {
goto err;
}
}
GST_OBJECT_UNLOCK (srtobject->element);
return TRUE;
err:
GST_OBJECT_UNLOCK (srtobject->element);
return FALSE;
}
GstSRTObject *
gst_srt_object_new (GstElement * element)
{
GstSRTObject *srtobject;
gint fd, fd_flags = SRT_EPOLL_ERR | SRT_EPOLL_IN;
if (g_atomic_int_add (&srt_init_refcount, 1) == 0) {
GST_DEBUG_OBJECT (element, "Starting up SRT");
if (srt_startup () < 0) {
g_warning ("Failed to initialize SRT (reason: %s)",
srt_getlasterror_str ());
}
}
srtobject = g_new0 (GstSRTObject, 1);
srtobject->element = element;
srtobject->cancellable = g_cancellable_new ();
srtobject->parameters = gst_structure_new_empty ("application/x-srt-params");
srtobject->sock = SRT_INVALID_SOCK;
srtobject->poll_id = srt_epoll_create ();
srtobject->sent_headers = FALSE;
srtobject->wait_for_connection = GST_SRT_DEFAULT_WAIT_FOR_CONNECTION;
srtobject->auto_reconnect = GST_SRT_DEFAULT_AUTO_RECONNECT;
fd = g_cancellable_get_fd (srtobject->cancellable);
if (fd >= 0)
srt_epoll_add_ssock (srtobject->poll_id, fd, &fd_flags);
g_cancellable_cancel (srtobject->cancellable);
g_cond_init (&srtobject->sock_cond);
return srtobject;
}
void
gst_srt_object_destroy (GstSRTObject * srtobject)
{
g_return_if_fail (srtobject != NULL);
if (srtobject->sock != SRT_INVALID_SOCK) {
srt_close (srtobject->sock);
}
srt_epoll_release (srtobject->poll_id);
g_cond_clear (&srtobject->sock_cond);
GST_DEBUG_OBJECT (srtobject->element, "Destroying srtobject");
gst_structure_free (srtobject->parameters);
if (g_atomic_int_dec_and_test (&srt_init_refcount)) {
srt_cleanup ();
GST_DEBUG_OBJECT (srtobject->element, "Cleaning up SRT");
}
g_clear_pointer (&srtobject->uri, gst_uri_unref);
g_clear_object (&srtobject->cancellable);
g_free (srtobject);
}
gboolean
gst_srt_object_set_property_helper (GstSRTObject * srtobject,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GST_OBJECT_LOCK (srtobject->element);
switch (prop_id) {
case PROP_URI:
gst_srt_object_set_uri (srtobject, g_value_get_string (value), NULL);
break;
case PROP_MODE:
gst_structure_set_value (srtobject->parameters, "mode", value);
break;
case PROP_POLL_TIMEOUT:
gst_structure_set_value (srtobject->parameters, "poll-timeout", value);
break;
case PROP_LATENCY:
gst_structure_set_value (srtobject->parameters, "latency", value);
break;
case PROP_LOCALADDRESS:
gst_structure_set_value (srtobject->parameters, "localaddress", value);
break;
case PROP_LOCALPORT:
gst_structure_set_value (srtobject->parameters, "localport", value);
break;
case PROP_PASSPHRASE:
gst_structure_set_value (srtobject->parameters, "passphrase", value);
break;
case PROP_PBKEYLEN:
gst_structure_set (srtobject->parameters, "pbkeylen", G_TYPE_INT,
g_value_get_enum (value), NULL);
break;
case PROP_WAIT_FOR_CONNECTION:
srtobject->wait_for_connection = g_value_get_boolean (value);
break;
case PROP_STREAMID:
gst_structure_set_value (srtobject->parameters, "streamid", value);
break;
case PROP_AUTHENTICATION:
srtobject->authentication = g_value_get_boolean (value);
case PROP_AUTO_RECONNECT:
srtobject->auto_reconnect = g_value_get_boolean (value);
break;
default:
goto err;
}
GST_OBJECT_UNLOCK (srtobject->element);
return TRUE;
err:
GST_OBJECT_UNLOCK (srtobject->element);
return FALSE;
}
gboolean
gst_srt_object_get_property_helper (GstSRTObject * srtobject,
guint prop_id, GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
case PROP_URI:
GST_OBJECT_LOCK (srtobject->element);
g_value_take_string (value, gst_uri_to_string (srtobject->uri));
GST_OBJECT_UNLOCK (srtobject->element);
break;
case PROP_MODE:{
GstSRTConnectionMode v;
GST_OBJECT_LOCK (srtobject->element);
if (!gst_structure_get_enum (srtobject->parameters, "mode",
GST_TYPE_SRT_CONNECTION_MODE, (gint *) & v)) {
GST_WARNING_OBJECT (srtobject->element, "Failed to get 'mode'");
v = GST_SRT_CONNECTION_MODE_NONE;
}
g_value_set_enum (value, v);
GST_OBJECT_UNLOCK (srtobject->element);
break;
}
case PROP_LOCALADDRESS:
GST_OBJECT_LOCK (srtobject->element);
g_value_set_string (value,
gst_structure_get_string (srtobject->parameters, "localaddress"));
GST_OBJECT_UNLOCK (srtobject->element);
break;
case PROP_LOCALPORT:{
guint v;
GST_OBJECT_LOCK (srtobject->element);
if (!gst_structure_get_uint (srtobject->parameters, "localport", &v)) {
GST_WARNING_OBJECT (srtobject->element, "Failed to get 'localport'");
v = GST_SRT_DEFAULT_PORT;
}
g_value_set_uint (value, v);
GST_OBJECT_UNLOCK (srtobject->element);
break;
}
case PROP_PBKEYLEN:{
GstSRTKeyLength v;
GST_OBJECT_LOCK (srtobject->element);
if (!gst_structure_get_int (srtobject->parameters, "pbkeylen",
(gint *) & v)) {
GST_WARNING_OBJECT (srtobject->element, "Failed to get 'pbkeylen'");
v = GST_SRT_KEY_LENGTH_NO_KEY;
}
g_value_set_enum (value, v);
GST_OBJECT_UNLOCK (srtobject->element);
break;
}
case PROP_POLL_TIMEOUT:{
gint v;
GST_OBJECT_LOCK (srtobject->element);
if (!gst_structure_get_int (srtobject->parameters, "poll-timeout", &v)) {
GST_WARNING_OBJECT (srtobject->element, "Failed to get 'poll-timeout'");
v = GST_SRT_DEFAULT_POLL_TIMEOUT;
}
g_value_set_int (value, v);
GST_OBJECT_UNLOCK (srtobject->element);
break;
}
case PROP_LATENCY:{
gint v;
GST_OBJECT_LOCK (srtobject->element);
if (!gst_structure_get_int (srtobject->parameters, "latency", &v)) {
GST_WARNING_OBJECT (srtobject->element, "Failed to get 'latency'");
v = GST_SRT_DEFAULT_LATENCY;
}
g_value_set_int (value, v);
GST_OBJECT_UNLOCK (srtobject->element);
break;
}
case PROP_STATS:
g_value_take_boxed (value, gst_srt_object_get_stats (srtobject));
break;
case PROP_WAIT_FOR_CONNECTION:
GST_OBJECT_LOCK (srtobject->element);
g_value_set_boolean (value, srtobject->wait_for_connection);
GST_OBJECT_UNLOCK (srtobject->element);
break;
case PROP_STREAMID:
GST_OBJECT_LOCK (srtobject->element);
g_value_set_string (value,
gst_structure_get_string (srtobject->parameters, "streamid"));
GST_OBJECT_UNLOCK (srtobject->element);
break;
case PROP_AUTHENTICATION:
g_value_set_boolean (value, srtobject->authentication);
case PROP_AUTO_RECONNECT:
GST_OBJECT_LOCK (srtobject->element);
g_value_set_boolean (value, srtobject->auto_reconnect);
GST_OBJECT_UNLOCK (srtobject->element);
break;
default:
return FALSE;
}
return TRUE;
}
void
gst_srt_object_install_properties_helper (GObjectClass * gobject_class)
{
/**
* GstSRTSrc:uri:
*
* The URI used by SRT connection. User can specify SRT specific options by URI parameters.
* Refer to <a href="https://github.com/Haivision/srt/blob/master/docs/stransmit.md#medium-srt">Mediun: SRT</a>
*/
g_object_class_install_property (gobject_class, PROP_URI,
g_param_spec_string ("uri", "URI",
"URI in the form of srt://address:port", GST_SRT_DEFAULT_URI,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY |
G_PARAM_STATIC_STRINGS));
/**
* GstSRTSrc:mode:
*
* The SRT connection mode.
* This property can be set by URI parameters.
*/
g_object_class_install_property (gobject_class, PROP_MODE,
g_param_spec_enum ("mode", "Connection mode",
"SRT connection mode", GST_TYPE_SRT_CONNECTION_MODE,
GST_SRT_CONNECTION_MODE_CALLER,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY |
G_PARAM_STATIC_STRINGS));
gst_type_mark_as_plugin_api (GST_TYPE_SRT_CONNECTION_MODE, 0);
/**
* GstSRTSrc:localaddress:
*
* The address to bind when #GstSRTSrc:mode is listener or rendezvous.
* This property can be set by URI parameters.
*/
g_object_class_install_property (gobject_class, PROP_LOCALADDRESS,
g_param_spec_string ("localaddress", "Local address",
"Local address to bind", GST_SRT_DEFAULT_LOCALADDRESS,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY |
G_PARAM_STATIC_STRINGS));
/**
* GstSRTSrc:localport:
*
* The local port to bind when #GstSRTSrc:mode is listener or rendezvous.
* This property can be set by URI parameters.
*/
g_object_class_install_property (gobject_class, PROP_LOCALPORT,
g_param_spec_uint ("localport", "Local port",
"Local port to bind", 0,
65535, GST_SRT_DEFAULT_PORT,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY |
G_PARAM_STATIC_STRINGS));
/**
* GstSRTSrc:passphrase:
*
* The password for the encrypted transmission.
* This property can be set by URI parameters.
*/
g_object_class_install_property (gobject_class, PROP_PASSPHRASE,
g_param_spec_string ("passphrase", "Passphrase",
"Password for the encrypted transmission", "",
G_PARAM_WRITABLE | GST_PARAM_MUTABLE_READY | G_PARAM_STATIC_STRINGS));
/**
* GstSRTSrc:pbkeylen:
*
* The crypto key length.
* This property can be set by URI parameters.
*/
g_object_class_install_property (gobject_class, PROP_PBKEYLEN,
g_param_spec_enum ("pbkeylen", "Crypto key length",
"Crypto key length in bytes", GST_TYPE_SRT_KEY_LENGTH,
GST_SRT_DEFAULT_PBKEYLEN,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY |
G_PARAM_STATIC_STRINGS));
gst_type_mark_as_plugin_api (GST_TYPE_SRT_KEY_LENGTH, 0);
/**
* GstSRTSrc:poll-timeout:
*
* The polling timeout used when srt poll is started.
* Even if the default value indicates infinite waiting, it can be cancellable according to #GstState
* This property can be set by URI parameters.
*/
g_object_class_install_property (gobject_class, PROP_POLL_TIMEOUT,
g_param_spec_int ("poll-timeout", "Poll timeout",
"Return poll wait after timeout milliseconds (-1 = infinite)", -1,
G_MAXINT32, GST_SRT_DEFAULT_POLL_TIMEOUT,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY |
G_PARAM_STATIC_STRINGS));
/**
* GstSRTSrc:latency:
*
* The maximum accepted transmission latency.
*/
g_object_class_install_property (gobject_class, PROP_LATENCY,
g_param_spec_int ("latency", "latency",
"Minimum latency (milliseconds)", 0,
G_MAXINT32, GST_SRT_DEFAULT_LATENCY,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstSRTSrc:stats:
*
* The statistics from SRT.
*/
g_object_class_install_property (gobject_class, PROP_STATS,
g_param_spec_boxed ("stats", "Statistics",
"SRT Statistics", GST_TYPE_STRUCTURE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* GstSRTSink:wait-for-connection:
*
* Boolean to block streaming until a client connects. If TRUE,
* `srtsink' will stream only when a client is connected.
*/
g_object_class_install_property (gobject_class, PROP_WAIT_FOR_CONNECTION,
g_param_spec_boolean ("wait-for-connection",
"Wait for a connection",
"Block the stream until a client connects",
GST_SRT_DEFAULT_WAIT_FOR_CONNECTION,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstSRTSrc:streamid:
*
* The stream id for the SRT access control.
*/
g_object_class_install_property (gobject_class, PROP_STREAMID,
g_param_spec_string ("streamid", "Stream ID",
"Stream ID for the SRT access control", "",
G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY |
G_PARAM_STATIC_STRINGS));
/**
* GstSRTSink:authentication:
*
* Boolean to authenticate a connection. If TRUE,
* the incoming connection is authenticated. Else,
* all the connections are accepted.
*
* Since: 1.20
*
*/
g_object_class_install_property (gobject_class, PROP_AUTHENTICATION,
g_param_spec_boolean ("authentication",
"Authentication",
"Authenticate a connection",
FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstSRTSrc:auto-reconnect:
*
* Boolean to choose whether to automatically reconnect. If TRUE, an element
* in caller mode will try to reconnect instead of reporting an error.
*
* Since: 1.22
*
*/
g_object_class_install_property (gobject_class, PROP_AUTO_RECONNECT,
g_param_spec_boolean ("auto-reconnect",
"Automatic reconnect",
"Automatically reconnect when connection fails",
GST_SRT_DEFAULT_AUTO_RECONNECT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
gst_srt_object_set_enum_value (GstStructure * s, GType enum_type,
gconstpointer key, gconstpointer value)
{
GEnumClass *enum_class;
GEnumValue *enum_value;
enum_class = g_type_class_ref (enum_type);
enum_value = g_enum_get_value_by_nick (enum_class, value);
if (enum_value) {
gst_structure_set (s, key, enum_type, enum_value->value, NULL);
}
g_type_class_unref (enum_class);
}
static void
gst_srt_object_set_string_value (GstStructure * s, const gchar * key,
const gchar * value)
{
gst_structure_set (s, key, G_TYPE_STRING, value, NULL);
}
static void
gst_srt_object_set_uint_value (GstStructure * s, const gchar * key,
const gchar * value)
{
gst_structure_set (s, key, G_TYPE_UINT,
(guint) g_ascii_strtoll (value, NULL, 10), NULL);
}
static void
gst_srt_object_set_int_value (GstStructure * s, const gchar * key,
const gchar * value)
{
gst_structure_set (s, key, G_TYPE_INT,
(gint) g_ascii_strtoll (value, NULL, 10), NULL);
}
static void
gst_srt_object_set_int64_value (GstStructure * s, const gchar * key,
const gchar * value)
{
gst_structure_set (s, key, G_TYPE_INT64,
g_ascii_strtoll (value, NULL, 10), NULL);
}
static void
gst_srt_object_set_boolean_value (GstStructure * s, const gchar * key,
const gchar * value)
{
gboolean bool_val;
static const gchar *true_names[] = {
"1", "yes", "on", "true", NULL
};
static const gchar *false_names[] = {
"0", "no", "off", "false", NULL
};
if (g_strv_contains (true_names, value)) {
bool_val = TRUE;
} else if (g_strv_contains (false_names, value)) {
bool_val = FALSE;
} else {
return;
}
gst_structure_set (s, key, G_TYPE_BOOLEAN, bool_val, NULL);
}
static void
gst_srt_object_set_socket_option (GstStructure * s, const gchar * key,
const gchar * value)
{
SrtOption *option = srt_options;
for (; option->name; ++option) {
if (g_str_equal (key, option->name)) {
switch (option->gtype) {
case G_TYPE_INT:
gst_srt_object_set_int_value (s, key, value);
break;
case G_TYPE_INT64:
gst_srt_object_set_int64_value (s, key, value);
break;
case G_TYPE_STRING:
gst_srt_object_set_string_value (s, key, value);
break;
case G_TYPE_BOOLEAN:
gst_srt_object_set_boolean_value (s, key, value);
break;
}
break;
}
}
}
static void
gst_srt_object_validate_parameters (GstStructure * s, GstUri * uri)
{
GstSRTConnectionMode connection_mode = GST_SRT_CONNECTION_MODE_NONE;
gst_structure_get_enum (s, "mode", GST_TYPE_SRT_CONNECTION_MODE,
(gint *) & connection_mode);
if (connection_mode == GST_SRT_CONNECTION_MODE_RENDEZVOUS ||
connection_mode == GST_SRT_CONNECTION_MODE_LISTENER) {
guint local_port;
const gchar *local_address = gst_structure_get_string (s, "localaddress");
if (local_address == NULL) {
local_address =
gst_uri_get_host (uri) ==
NULL ? GST_SRT_DEFAULT_LOCALADDRESS : gst_uri_get_host (uri);
gst_srt_object_set_string_value (s, "localaddress", local_address);
}
if (!gst_structure_get_uint (s, "localport", &local_port)) {
local_port =
gst_uri_get_port (uri) ==
GST_URI_NO_PORT ? GST_SRT_DEFAULT_PORT : gst_uri_get_port (uri);
gst_structure_set (s, "localport", G_TYPE_UINT, local_port, NULL);
}
}
}
/* called with GST_OBJECT_LOCK (srtobject->element) held */
gboolean
gst_srt_object_set_uri (GstSRTObject * srtobject, const gchar * uri,
GError ** err)
{
GHashTable *query_table = NULL;
GHashTableIter iter;
gpointer key, value;
const char *addr_str;
if (srtobject->opened) {
g_warning
("It's not supported to change the 'uri' property when SRT socket is opened.");
g_set_error (err, GST_URI_ERROR, GST_URI_ERROR_BAD_STATE,
"It's not supported to change the 'uri' property when SRT socket is opened");
return FALSE;
}
if (!g_str_has_prefix (uri, GST_SRT_DEFAULT_URI_SCHEME)) {
g_warning ("Given uri cannot be used for SRT connection.");
g_set_error (err, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
"Invalid SRT URI scheme");
return FALSE;
}
g_clear_pointer (&srtobject->uri, gst_uri_unref);
srtobject->uri = gst_uri_from_string (uri);
g_clear_pointer (&srtobject->parameters, gst_structure_free);
srtobject->parameters = gst_structure_new ("application/x-srt-params",
"poll-timeout", G_TYPE_INT, GST_SRT_DEFAULT_POLL_TIMEOUT,
"latency", G_TYPE_INT, GST_SRT_DEFAULT_LATENCY, NULL);
query_table = gst_uri_get_query_table (srtobject->uri);
GST_DEBUG_OBJECT (srtobject->element,
"set uri to (host: %s, port: %d) with %d query strings",
gst_uri_get_host (srtobject->uri), gst_uri_get_port (srtobject->uri),
query_table == NULL ? 0 : g_hash_table_size (query_table));
addr_str = gst_uri_get_host (srtobject->uri);
if (addr_str)
gst_srt_object_set_enum_value (srtobject->parameters,
GST_TYPE_SRT_CONNECTION_MODE, "mode", "caller");
else
gst_srt_object_set_enum_value (srtobject->parameters,
GST_TYPE_SRT_CONNECTION_MODE, "mode", "listener");
if (query_table) {
g_hash_table_iter_init (&iter, query_table);
while (g_hash_table_iter_next (&iter, &key, &value)) {
if (!g_strcmp0 ("mode", key)) {
gst_srt_object_set_enum_value (srtobject->parameters,
GST_TYPE_SRT_CONNECTION_MODE, key, value);
} else if (!g_strcmp0 ("localaddress", key)) {
gst_srt_object_set_string_value (srtobject->parameters, key, value);
} else if (!g_strcmp0 ("localport", key)) {
gst_srt_object_set_uint_value (srtobject->parameters, key, value);
} else if (!g_strcmp0 ("poll-timeout", key)) {
gst_srt_object_set_int_value (srtobject->parameters, key, value);
} else {
gst_srt_object_set_socket_option (srtobject->parameters, key, value);
}
}
g_hash_table_unref (query_table);
}
gst_srt_object_validate_parameters (srtobject->parameters, srtobject->uri);
return TRUE;
}
static gpointer
thread_func (gpointer data)
{
GstSRTObject *srtobject = data;
gint poll_timeout;
GST_OBJECT_LOCK (srtobject->element);
if (!gst_structure_get_int (srtobject->parameters, "poll-timeout",
&poll_timeout)) {
poll_timeout = GST_SRT_DEFAULT_POLL_TIMEOUT;
}
GST_OBJECT_UNLOCK (srtobject->element);
for (;;) {
SRTSOCKET rsock;
gint rsocklen = 1;
SYSSOCKET rsys, wsys;
gint rsyslen = 1, wsyslen = 1;
gint ret;
SRTSOCKET caller_sock;
union
{
struct sockaddr_storage ss;
struct sockaddr sa;
} caller_sa;
int caller_sa_len = sizeof (caller_sa);
SRTCaller *caller;
gint flag = SRT_EPOLL_ERR;
gint fd, fd_flags = SRT_EPOLL_ERR | SRT_EPOLL_IN;
GST_OBJECT_LOCK (srtobject->element);
if (!srtobject->opened) {
GST_OBJECT_UNLOCK (srtobject->element);
break;
}
GST_OBJECT_UNLOCK (srtobject->element);
switch (srt_getsockstate (srtobject->sock)) {
case SRTS_BROKEN:
case SRTS_CLOSING:
case SRTS_CLOSED:
case SRTS_NONEXIST:
GST_ELEMENT_ERROR (srtobject->element, RESOURCE, FAILED,
("Socket is broken or closed"), (NULL));
return NULL;
default:
break;
}
GST_TRACE_OBJECT (srtobject->element, "Waiting on listening socket");
ret =
srt_epoll_wait (srtobject->poll_id, &rsock, &rsocklen, NULL, 0,
poll_timeout, &rsys, &rsyslen, &wsys, &wsyslen);
GST_OBJECT_LOCK (srtobject->element);
if (!srtobject->opened) {
GST_OBJECT_UNLOCK (srtobject->element);
break;
}
GST_OBJECT_UNLOCK (srtobject->element);
if (ret < 0) {
gint srt_errno = srt_getlasterror (NULL);
if (srt_errno == SRT_ETIMEOUT)
continue;
GST_ELEMENT_ERROR (srtobject->element, RESOURCE, FAILED,
("Failed to poll socket: %s", srt_getlasterror_str ()), (NULL));
return NULL;
}
if (rsocklen != 1)
continue;
caller_sock = srt_accept (rsock, &caller_sa.sa, &caller_sa_len);
if (caller_sock == SRT_INVALID_SOCK) {
GST_ELEMENT_ERROR (srtobject->element, RESOURCE, FAILED,
("Failed to accept connection: %s", srt_getlasterror_str ()), (NULL));
return NULL;
}
caller = srt_caller_new ();
caller->sockaddr =
g_socket_address_new_from_native (&caller_sa.sa, caller_sa_len);
caller->poll_id = srt_epoll_create ();
caller->sock = caller_sock;
fd = g_cancellable_get_fd (srtobject->cancellable);
if (fd >= 0)
srt_epoll_add_ssock (srtobject->poll_id, fd, &fd_flags);
if (gst_uri_handler_get_uri_type (GST_URI_HANDLER
(srtobject->element)) == GST_URI_SRC) {
flag |= SRT_EPOLL_IN;
} else {
flag |= SRT_EPOLL_OUT;
}
if (srt_epoll_add_usock (caller->poll_id, caller_sock, &flag) < 0) {
GST_ELEMENT_WARNING (srtobject->element, LIBRARY, SETTINGS,
("%s", srt_getlasterror_str ()), (NULL));
srt_caller_free (caller);
/* try-again */
continue;
}
GST_DEBUG_OBJECT (srtobject->element, "Accept to connect %d", caller->sock);
g_mutex_lock (&srtobject->sock_lock);
srtobject->callers = g_list_prepend (srtobject->callers, caller);
g_cond_signal (&srtobject->sock_cond);
g_mutex_unlock (&srtobject->sock_lock);
/* notifying caller-added */
g_signal_emit_by_name (srtobject->element, "caller-added", 0,
caller->sockaddr);
if (gst_uri_handler_get_uri_type (GST_URI_HANDLER (srtobject->element)) ==
GST_URI_SRC)
break;
}
return NULL;
}
static GSocketAddress *
peeraddr_to_g_socket_address (const struct sockaddr *peeraddr)
{
gsize peeraddr_len;
switch (peeraddr->sa_family) {
case AF_INET:
peeraddr_len = sizeof (struct sockaddr_in);
break;
case AF_INET6:
peeraddr_len = sizeof (struct sockaddr_in6);
break;
default:
g_warning ("Unsupported address family %d", peeraddr->sa_family);
return NULL;
}
return g_socket_address_new_from_native ((gpointer) peeraddr, peeraddr_len);
}
static gint
srt_listen_callback_func (GstSRTObject * self, SRTSOCKET sock, int hs_version,
const struct sockaddr *peeraddr, const char *stream_id)
{
GSocketAddress *addr = peeraddr_to_g_socket_address (peeraddr);
if (!addr) {
GST_WARNING_OBJECT (self->element,
"Invalid peer address. Rejecting sink %d streamid: %s", sock,
stream_id);
return -1;
}
if (self->authentication) {
gboolean authenticated = FALSE;
/* notifying caller-connecting */
g_signal_emit_by_name (self->element, "caller-connecting", addr,
stream_id, &authenticated);
if (!authenticated)
goto reject;
}
GST_DEBUG_OBJECT (self->element,
"Accepting sink %d streamid: %s", sock, stream_id);
g_object_unref (addr);
return 0;
reject:
/* notifying caller-rejected */
GST_WARNING_OBJECT (self->element,
"Rejecting sink %d streamid: %s", sock, stream_id);
g_signal_emit_by_name (self->element, "caller-rejected", addr, stream_id);
g_object_unref (addr);
return -1;
}
static gboolean
gst_srt_object_wait_connect (GstSRTObject * srtobject, gpointer sa,
size_t sa_len, GError ** error)
{
SRTSOCKET sock = SRT_INVALID_SOCK;
const gchar *local_address = NULL;
guint local_port = 0;
gint sock_flags = SRT_EPOLL_ERR | SRT_EPOLL_IN;
gboolean poll_added = FALSE;
gpointer bind_sa;
gsize bind_sa_len;
GSocketAddress *bind_addr = NULL;
GST_OBJECT_LOCK (srtobject->element);
gst_structure_get_uint (srtobject->parameters, "localport", &local_port);
local_address =
gst_structure_get_string (srtobject->parameters, "localaddress");
if (local_address == NULL)
local_address = GST_SRT_DEFAULT_LOCALADDRESS;
GST_OBJECT_UNLOCK (srtobject->element);
bind_addr =
gst_srt_object_resolve (srtobject, local_address, local_port, error);
if (!bind_addr) {
goto failed;
}
bind_sa_len = g_socket_address_get_native_size (bind_addr);
bind_sa = g_alloca (bind_sa_len);
if (!g_socket_address_to_native (bind_addr, bind_sa, bind_sa_len, error)) {
goto failed;
}
g_clear_object (&bind_addr);
sock = srt_create_socket ();
if (sock == SRT_INVALID_SOCK) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_INIT, "%s",
srt_getlasterror_str ());
goto failed;
}
if (!gst_srt_object_set_common_params (sock, srtobject, error)) {
goto failed;
}
GST_DEBUG_OBJECT (srtobject->element, "Binding to %s (port: %d)",
local_address, local_port);
if (srt_bind (sock, bind_sa, bind_sa_len) == SRT_ERROR) {
g_set_error (error, GST_RESOURCE_ERROR,
GST_RESOURCE_ERROR_OPEN_READ_WRITE, "Cannot bind to %s:%d - %s",
local_address, local_port, srt_getlasterror_str ());
goto failed;
}
if (srt_epoll_add_usock (srtobject->poll_id, sock, &sock_flags) < 0) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS, "%s",
srt_getlasterror_str ());
goto failed;
}
poll_added = TRUE;
GST_DEBUG_OBJECT (srtobject->element, "Starting to listen on bind socket");
if (srt_listen (sock, 1) == SRT_ERROR) {
g_set_error (error, GST_RESOURCE_ERROR,
GST_RESOURCE_ERROR_OPEN_READ_WRITE, "Cannot listen on bind socket: %s",
srt_getlasterror_str ());
goto failed;
}
srtobject->sock = sock;
/* Register the SRT listen callback */
if (srt_listen_callback (srtobject->sock,
(srt_listen_callback_fn *) srt_listen_callback_func, srtobject)) {
goto failed;
}
srtobject->thread =
g_thread_try_new ("GstSRTObjectListener", thread_func, srtobject, error);
if (srtobject->thread == NULL) {
GST_ERROR_OBJECT (srtobject->element, "Failed to start thread");
goto failed;
}
return TRUE;
failed:
if (poll_added) {
srt_epoll_remove_usock (srtobject->poll_id, sock);
}
if (sock != SRT_INVALID_SOCK) {
srt_close (sock);
}
g_clear_object (&bind_addr);
srtobject->sock = SRT_INVALID_SOCK;
return FALSE;
}
static gboolean
gst_srt_object_connect (GstSRTObject * srtobject,
GstSRTConnectionMode connection_mode, gpointer sa, size_t sa_len,
GError ** error)
{
SRTSOCKET sock;
gint sock_flags = SRT_EPOLL_ERR;
guint local_port = 0;
const gchar *local_address = NULL;
bool sender;
bool rendezvous;
sock = srt_create_socket ();
if (sock == SRT_INVALID_SOCK) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_INIT, "%s",
srt_getlasterror_str ());
return FALSE;
}
if (!gst_srt_object_set_common_params (sock, srtobject, error)) {
goto failed;
}
switch (gst_uri_handler_get_uri_type (GST_URI_HANDLER (srtobject->element))) {
case GST_URI_SRC:
sender = false;
sock_flags |= SRT_EPOLL_IN;
break;
case GST_URI_SINK:
sender = true;
sock_flags |= SRT_EPOLL_OUT;
break;
default:
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS,
"Cannot determine stream direction");
goto failed;
}
if (srt_setsockopt (sock, 0, SRTO_SENDER, &sender, sizeof sender)) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS, "%s",
srt_getlasterror_str ());
goto failed;
}
rendezvous = (connection_mode == GST_SRT_CONNECTION_MODE_RENDEZVOUS);
if (srt_setsockopt (sock, 0, SRTO_RENDEZVOUS, &rendezvous, sizeof rendezvous)) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS, "%s",
srt_getlasterror_str ());
goto failed;
}
GST_OBJECT_LOCK (srtobject->element);
gst_structure_get_uint (srtobject->parameters, "localport", &local_port);
local_address =
gst_structure_get_string (srtobject->parameters, "localaddress");
GST_OBJECT_UNLOCK (srtobject->element);
/* According to SRT norm, bind local address and port if specified */
if (local_address != NULL && local_port != 0) {
gpointer bind_sa;
gsize bind_sa_len;
GSocketAddress *bind_addr =
gst_srt_object_resolve (srtobject, local_address, local_port, error);
if (!bind_addr) {
goto failed;
}
bind_sa_len = g_socket_address_get_native_size (bind_addr);
bind_sa = g_alloca (bind_sa_len);
if (!g_socket_address_to_native (bind_addr, bind_sa, bind_sa_len, error)) {
g_clear_object (&bind_addr);
goto failed;
}
g_clear_object (&bind_addr);
GST_DEBUG_OBJECT (srtobject->element, "Binding to %s (port: %d)",
local_address, local_port);
if (srt_bind (sock, bind_sa, bind_sa_len) == SRT_ERROR) {
g_set_error (error, GST_RESOURCE_ERROR,
GST_RESOURCE_ERROR_OPEN_READ_WRITE, "Cannot bind to %s:%d - %s",
local_address, local_port, srt_getlasterror_str ());
goto failed;
}
}
if (srt_epoll_add_usock (srtobject->poll_id, sock, &sock_flags) < 0) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS, "%s",
srt_getlasterror_str ());
goto failed;
}
if (srt_connect (sock, sa, sa_len) == SRT_ERROR) {
g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_OPEN_READ, "%s",
srt_getlasterror_str ());
srt_epoll_remove_usock (srtobject->poll_id, sock);
goto failed;
}
srtobject->sock = sock;
return TRUE;
failed:
srt_close (sock);
return FALSE;
}
static gboolean
gst_srt_object_open_internal (GstSRTObject * srtobject, GError ** error)
{
GSocketAddress *socket_address = NULL;
GstSRTConnectionMode connection_mode;
gpointer sa;
size_t sa_len;
const gchar *addr_str;
guint port;
gboolean ret = FALSE;
GST_OBJECT_LOCK (srtobject->element);
if (!gst_structure_get_enum (srtobject->parameters,
"mode", GST_TYPE_SRT_CONNECTION_MODE, (gint *) & connection_mode)) {
GST_WARNING_OBJECT (srtobject->element,
"Cannot get connection mode information." " Use default mode");
connection_mode = GST_SRT_DEFAULT_MODE;
}
addr_str = gst_uri_get_host (srtobject->uri);
if (addr_str == NULL) {
connection_mode = GST_SRT_CONNECTION_MODE_LISTENER;
addr_str = GST_SRT_DEFAULT_LOCALADDRESS;
GST_DEBUG_OBJECT (srtobject->element,
"Given uri doesn't have hostname or address. Use any (%s) and"
" setting listener mode", addr_str);
}
port = gst_uri_get_port (srtobject->uri);
GST_DEBUG_OBJECT (srtobject->element,
"Opening SRT socket with parameters: %" GST_PTR_FORMAT,
srtobject->parameters);
GST_OBJECT_UNLOCK (srtobject->element);
socket_address = gst_srt_object_resolve (srtobject, addr_str, port, error);
if (socket_address == NULL) {
goto out;
}
sa_len = g_socket_address_get_native_size (socket_address);
sa = g_alloca (sa_len);
if (!g_socket_address_to_native (socket_address, sa, sa_len, error)) {
goto out;
}
if (connection_mode == GST_SRT_CONNECTION_MODE_LISTENER) {
ret = gst_srt_object_wait_connect (srtobject, sa, sa_len, error);
} else {
ret =
gst_srt_object_connect (srtobject, connection_mode, sa, sa_len, error);
}
out:
g_clear_object (&socket_address);
return ret;
}
gboolean
gst_srt_object_open (GstSRTObject * srtobject, GError ** error)
{
GST_OBJECT_LOCK (srtobject->element);
srtobject->opened = TRUE;
GST_OBJECT_UNLOCK (srtobject->element);
g_cancellable_reset (srtobject->cancellable);
srtobject->bytes = 0;
return gst_srt_object_open_internal (srtobject, error);
}
static void
gst_srt_object_close_internal (GstSRTObject * srtobject)
{
g_mutex_lock (&srtobject->sock_lock);
if (srtobject->sock != SRT_INVALID_SOCK) {
srt_epoll_remove_usock (srtobject->poll_id, srtobject->sock);
GST_DEBUG_OBJECT (srtobject->element, "Closing SRT socket (0x%x)",
srtobject->sock);
srt_close (srtobject->sock);
srtobject->sock = SRT_INVALID_SOCK;
}
if (srtobject->thread) {
GThread *thread = g_steal_pointer (&srtobject->thread);
g_mutex_unlock (&srtobject->sock_lock);
g_thread_join (thread);
g_mutex_lock (&srtobject->sock_lock);
}
if (srtobject->callers) {
GList *callers = g_steal_pointer (&srtobject->callers);
g_list_foreach (callers, (GFunc) srt_caller_signal_removed, srtobject);
g_list_free_full (callers, (GDestroyNotify) srt_caller_free);
}
srtobject->sent_headers = FALSE;
g_mutex_unlock (&srtobject->sock_lock);
}
void
gst_srt_object_close (GstSRTObject * srtobject)
{
GST_OBJECT_LOCK (srtobject->element);
srtobject->opened = FALSE;
GST_OBJECT_UNLOCK (srtobject->element);
g_cancellable_cancel (srtobject->cancellable);
gst_srt_object_close_internal (srtobject);
}
static gboolean
gst_srt_object_wait_caller (GstSRTObject * srtobject)
{
gboolean ret;
g_mutex_lock (&srtobject->sock_lock);
ret = (srtobject->callers != NULL);
if (!ret) {
GST_INFO_OBJECT (srtobject->element, "Waiting for connection");
while (!ret && !g_cancellable_is_cancelled (srtobject->cancellable)) {
g_cond_wait (&srtobject->sock_cond, &srtobject->sock_lock);
ret = (srtobject->callers != NULL);
}
}
g_mutex_unlock (&srtobject->sock_lock);
if (ret) {
GST_DEBUG_OBJECT (srtobject->element, "Got a connection");
}
return ret;
}
gssize
gst_srt_object_read (GstSRTObject * srtobject, guint8 * data, gsize size,
GError ** error, SRT_MSGCTRL * mctrl)
{
gssize len = 0;
gint poll_timeout;
GstSRTConnectionMode connection_mode = GST_SRT_CONNECTION_MODE_NONE;
gint poll_id = SRT_ERROR;
SRTSOCKET sock = SRT_INVALID_SOCK;
gboolean auto_reconnect;
GError *internal_error = NULL;
/* Only source element can read data */
g_return_val_if_fail (gst_uri_handler_get_uri_type (GST_URI_HANDLER
(srtobject->element)) == GST_URI_SRC, -1);
GST_OBJECT_LOCK (srtobject->element);
gst_structure_get_enum (srtobject->parameters, "mode",
GST_TYPE_SRT_CONNECTION_MODE, (gint *) & connection_mode);
if (!gst_structure_get_int (srtobject->parameters, "poll-timeout",
&poll_timeout)) {
poll_timeout = GST_SRT_DEFAULT_POLL_TIMEOUT;
}
auto_reconnect = srtobject->auto_reconnect;
GST_OBJECT_UNLOCK (srtobject->element);
retry:
if (connection_mode == GST_SRT_CONNECTION_MODE_LISTENER) {
if (!gst_srt_object_wait_caller (srtobject))
return 0;
g_mutex_lock (&srtobject->sock_lock);
if (srtobject->callers) {
SRTCaller *caller = srtobject->callers->data;
poll_id = caller->poll_id;
sock = caller->sock;
}
g_mutex_unlock (&srtobject->sock_lock);
if (poll_id == SRT_ERROR)
return 0;
} else {
poll_id = srtobject->poll_id;
sock = srtobject->sock;
}
while (!g_cancellable_is_cancelled (srtobject->cancellable)) {
SRTSOCKET rsock, wsock;
gint rsocklen = 1, wsocklen = 1;
SYSSOCKET rsys, wsys;
gint rsyslen = 1, wsyslen = 1;
gint ret;
switch (srt_getsockstate (sock)) {
case SRTS_BROKEN:
case SRTS_CLOSING:
case SRTS_CLOSED:
case SRTS_NONEXIST:
g_set_error (&internal_error, GST_RESOURCE_ERROR,
GST_RESOURCE_ERROR_READ, "Socket is broken or closed");
goto err;
default:
break;
}
GST_TRACE_OBJECT (srtobject->element, "Waiting for read");
ret =
srt_epoll_wait (poll_id, &rsock, &rsocklen, &wsock, &wsocklen,
poll_timeout, &rsys, &rsyslen, &wsys, &wsyslen);
if (g_cancellable_is_cancelled (srtobject->cancellable))
break;
if (ret < 0) {
gint srt_errno = srt_getlasterror (NULL);
if (srt_errno == SRT_ETIMEOUT)
continue;
g_set_error (&internal_error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_READ,
"Failed to poll socket: %s", srt_getlasterror_str ());
goto err;
}
if (rsocklen != 1)
continue;
if (wsocklen == 1 && rsocklen == 1) {
/* Socket reported in wsock AND rsock signifies an error. */
gint reason = srt_getrejectreason (wsock);
if (reason == SRT_REJ_BADSECRET || reason == SRT_REJ_UNSECURE) {
g_set_error (&internal_error, GST_RESOURCE_ERROR,
GST_RESOURCE_ERROR_NOT_AUTHORIZED,
"Failed to authenticate: %" REASON_FORMAT, REASON_ARGS (reason));
} else {
g_set_error (&internal_error, GST_RESOURCE_ERROR,
GST_RESOURCE_ERROR_READ,
"Error on SRT socket: %" REASON_FORMAT, REASON_ARGS (reason));
}
goto err;
}
srt_msgctrl_init (mctrl);
len = srt_recvmsg2 (rsock, (char *) (data), size, mctrl);
if (len == SRT_ERROR) {
gint srt_errno = srt_getlasterror (NULL);
if (srt_errno == SRT_EASYNCRCV)
continue;
g_set_error (&internal_error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_READ,
"Failed to receive from SRT socket: %s", srt_getlasterror_str ());
goto err;
}
srtobject->bytes += len;
break;
}
return len;
err:
if (g_cancellable_is_cancelled (srtobject->cancellable))
return 0;
if (connection_mode == GST_SRT_CONNECTION_MODE_LISTENER) {
/* Caller has disappeared. */
ERROR_TO_WARNING (srtobject, internal_error, "");
g_clear_error (&internal_error);
return 0;
}
if (!auto_reconnect) {
g_propagate_error (error, internal_error);
return -1;
}
ERROR_TO_WARNING (srtobject, internal_error, ". Trying to reconnect");
g_clear_error (&internal_error);
gst_srt_object_close_internal (srtobject);
if (!gst_srt_object_open_internal (srtobject, error)) {
return -1;
}
goto retry;
}
void
gst_srt_object_unlock (GstSRTObject * srtobject)
{
GST_DEBUG_OBJECT (srtobject->element, "waking up SRT");
/* connection is only waited for in listener mode,
* but there is no harm in raising signal in any case */
g_mutex_lock (&srtobject->sock_lock);
/* however, a race might be harmful ...
* the cancellation is used as 'flushing' flag here,
* so make sure it is so detected by the intended part at proper time */
g_cancellable_cancel (srtobject->cancellable);
g_cond_signal (&srtobject->sock_cond);
g_mutex_unlock (&srtobject->sock_lock);
}
void
gst_srt_object_unlock_stop (GstSRTObject * srtobject)
{
g_cancellable_reset (srtobject->cancellable);
}
static gboolean
gst_srt_object_send_headers (GstSRTObject * srtobject, SRTSOCKET sock,
gint poll_id, gint poll_timeout, GstBufferList * headers, GError ** error)
{
guint size, i;
if (!headers)
return TRUE;
size = gst_buffer_list_length (headers);
GST_DEBUG_OBJECT (srtobject->element, "Sending %u stream headers", size);
for (i = 0; i < size; i++) {
SRTSOCKET wsock = sock;
gint wsocklen = 1;
SYSSOCKET rsys, wsys;
gint rsyslen = 1, wsyslen = 1;
gint ret = 0, sent;
GstBuffer *buffer = gst_buffer_list_get (headers, i);
GstMapInfo mapinfo;
if (g_cancellable_is_cancelled (srtobject->cancellable))
break;
if (poll_id >= 0) {
switch (srt_getsockstate (sock)) {
case SRTS_BROKEN:
case SRTS_CLOSING:
case SRTS_CLOSED:
case SRTS_NONEXIST:
g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_WRITE,
"Socket is broken or closed");
return FALSE;
default:
break;
}
GST_TRACE_OBJECT (srtobject->element, "Waiting for header write");
ret =
srt_epoll_wait (poll_id, NULL, 0, &wsock, &wsocklen, poll_timeout,
&rsys, &rsyslen, &wsys, &wsyslen);
if (g_cancellable_is_cancelled (srtobject->cancellable))
break;
}
if (ret < 0) {
gint srt_errno = srt_getlasterror (NULL);
if (srt_errno == SRT_ETIMEOUT)
continue;
g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_WRITE,
"Failed to poll socket: %s", srt_getlasterror_str ());
return FALSE;
}
if (wsocklen != 1)
continue;
GST_TRACE_OBJECT (srtobject->element, "sending header %u %" GST_PTR_FORMAT,
i, buffer);
if (!gst_buffer_map (buffer, &mapinfo, GST_MAP_READ)) {
g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_WRITE,
"Failed to map header buffer");
return FALSE;
}
sent = srt_sendmsg2 (wsock, (char *) mapinfo.data, mapinfo.size, 0);
if (sent == SRT_ERROR) {
g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_WRITE, "%s",
srt_getlasterror_str ());
gst_buffer_unmap (buffer, &mapinfo);
return FALSE;
}
srtobject->bytes += sent;
gst_buffer_unmap (buffer, &mapinfo);
}
return TRUE;
}
static gssize
gst_srt_object_write_to_callers (GstSRTObject * srtobject,
GstBufferList * headers, const GstMapInfo * mapinfo)
{
GList *item, *next;
g_mutex_lock (&srtobject->sock_lock);
for (item = srtobject->callers, next = NULL; item; item = next) {
SRTCaller *caller = item->data;
gssize len = 0;
const guint8 *msg = mapinfo->data;
gint sent;
gint payload_size, optlen = sizeof (payload_size);
next = item->next;
if (g_cancellable_is_cancelled (srtobject->cancellable)) {
goto cancelled;
}
if (!caller->sent_headers) {
GError *error = NULL;
if (!gst_srt_object_send_headers (srtobject, caller->sock, -1, 0, headers,
&error)) {
GST_WARNING_OBJECT (srtobject->element,
"Failed to send headers to caller %d: %s", caller->sock,
error->message);
g_error_free (error);
goto err;
}
caller->sent_headers = TRUE;
}
if (srt_getsockflag (caller->sock, SRTO_PAYLOADSIZE, &payload_size,
&optlen)) {
GST_WARNING_OBJECT (srtobject->element, "%s", srt_getlasterror_str ());
goto err;
}
while (len < mapinfo->size) {
gint rest = MIN (mapinfo->size - len, payload_size);
sent = srt_sendmsg2 (caller->sock, (char *) (msg + len), rest, 0);
if (sent < 0) {
GST_WARNING_OBJECT (srtobject->element, "Dropping caller %d: %s",
caller->sock, srt_getlasterror_str ());
goto err;
}
len += sent;
srtobject->bytes += sent;
}
continue;
err:
srtobject->callers = g_list_delete_link (srtobject->callers, item);
srt_caller_signal_removed (caller, srtobject);
srt_caller_free (caller);
}
g_mutex_unlock (&srtobject->sock_lock);
return mapinfo->size;
cancelled:
g_mutex_unlock (&srtobject->sock_lock);
return 0;
}
static gssize
gst_srt_object_write_one (GstSRTObject * srtobject, GstBufferList * headers,
const GstMapInfo * mapinfo, GError ** error)
{
gssize len = 0;
gint poll_timeout;
const guint8 *msg = mapinfo->data;
gint payload_size, optlen = sizeof (payload_size);
gboolean wait_for_connection, auto_reconnect;
GError *internal_error = NULL;
GST_OBJECT_LOCK (srtobject->element);
wait_for_connection = srtobject->wait_for_connection;
auto_reconnect = srtobject->auto_reconnect;
if (!gst_structure_get_int (srtobject->parameters, "poll-timeout",
&poll_timeout)) {
poll_timeout = GST_SRT_DEFAULT_POLL_TIMEOUT;
}
GST_OBJECT_UNLOCK (srtobject->element);
retry:
if (!srtobject->sent_headers) {
if (!gst_srt_object_send_headers (srtobject, srtobject->sock,
srtobject->poll_id, poll_timeout, headers, &internal_error)) {
goto err;
}
srtobject->sent_headers = TRUE;
}
while (len < mapinfo->size) {
SRTSOCKET rsock, wsock;
gint rsocklen = 1, wsocklen = 1;
SYSSOCKET rsys, wsys;
gint rsyslen = 1, wsyslen = 1;
gint ret, sent, rest;
gboolean connecting_but_not_waiting = FALSE;
if (g_cancellable_is_cancelled (srtobject->cancellable))
break;
switch (srt_getsockstate (srtobject->sock)) {
case SRTS_BROKEN:
case SRTS_CLOSING:
case SRTS_CLOSED:
case SRTS_NONEXIST:
g_set_error (&internal_error, GST_RESOURCE_ERROR,
GST_RESOURCE_ERROR_WRITE, "Socket is broken or closed");
goto err;
case SRTS_CONNECTING:
if (!wait_for_connection) {
/* We need to check for SRT_EPOLL_ERR */
connecting_but_not_waiting = TRUE;
}
break;
default:
break;
}
GST_TRACE_OBJECT (srtobject->element, "Waiting a write");
ret =
srt_epoll_wait (srtobject->poll_id, &rsock, &rsocklen, &wsock,
&wsocklen, connecting_but_not_waiting ? 0 : poll_timeout, &rsys,
&rsyslen, &wsys, &wsyslen);
if (g_cancellable_is_cancelled (srtobject->cancellable))
break;
if (ret < 0) {
gint srt_errno = srt_getlasterror (NULL);
if (srt_errno == SRT_ETIMEOUT)
continue;
g_set_error (&internal_error, GST_RESOURCE_ERROR,
GST_RESOURCE_ERROR_WRITE, "Failed to poll socket: %s",
srt_getlasterror_str ());
goto err;
}
if (wsocklen != 1)
continue;
if (wsocklen == 1 && rsocklen == 1) {
/* Socket reported in wsock AND rsock signifies an error. */
gint reason = srt_getrejectreason (wsock);
if (reason == SRT_REJ_BADSECRET || reason == SRT_REJ_UNSECURE) {
g_set_error (&internal_error, GST_RESOURCE_ERROR,
GST_RESOURCE_ERROR_NOT_AUTHORIZED,
"Failed to authenticate: %" REASON_FORMAT, REASON_ARGS (reason));
} else {
g_set_error (&internal_error, GST_RESOURCE_ERROR,
GST_RESOURCE_ERROR_WRITE,
"Error on SRT socket: %" REASON_FORMAT, REASON_ARGS (reason));
}
goto err;
}
if (connecting_but_not_waiting) {
GST_LOG_OBJECT (srtobject->element,
"Not connected yet. Dropping the buffer.");
break;
}
if (srt_getsockflag (wsock, SRTO_PAYLOADSIZE, &payload_size, &optlen)) {
g_set_error (&internal_error, GST_RESOURCE_ERROR,
GST_RESOURCE_ERROR_WRITE, "%s", srt_getlasterror_str ());
goto err;
}
rest = MIN (mapinfo->size - len, payload_size);
sent = srt_sendmsg2 (wsock, (char *) (msg + len), rest, 0);
if (sent < 0) {
g_set_error (&internal_error, GST_RESOURCE_ERROR,
GST_RESOURCE_ERROR_WRITE, "%s", srt_getlasterror_str ());
goto err;
}
len += sent;
srtobject->bytes += sent;
continue;
}
return len;
err:
if (g_cancellable_is_cancelled (srtobject->cancellable))
return 0;
if (!auto_reconnect) {
g_propagate_error (error, internal_error);
return -1;
}
ERROR_TO_WARNING (srtobject, internal_error, ". Trying to reconnect");
g_clear_error (&internal_error);
gst_srt_object_close_internal (srtobject);
if (!gst_srt_object_open_internal (srtobject, error)) {
return -1;
}
goto retry;
}
gssize
gst_srt_object_write (GstSRTObject * srtobject, GstBufferList * headers,
const GstMapInfo * mapinfo, GError ** error)
{
gssize len = 0;
GstSRTConnectionMode connection_mode = GST_SRT_CONNECTION_MODE_NONE;
gboolean wait_for_connection;
/* Only sink element can write data */
g_return_val_if_fail (gst_uri_handler_get_uri_type (GST_URI_HANDLER
(srtobject->element)) == GST_URI_SINK, -1);
GST_OBJECT_LOCK (srtobject->element);
gst_structure_get_enum (srtobject->parameters, "mode",
GST_TYPE_SRT_CONNECTION_MODE, (gint *) & connection_mode);
wait_for_connection = srtobject->wait_for_connection;
GST_OBJECT_UNLOCK (srtobject->element);
if (connection_mode == GST_SRT_CONNECTION_MODE_LISTENER) {
if (wait_for_connection) {
if (!gst_srt_object_wait_caller (srtobject))
return 0;
}
len = gst_srt_object_write_to_callers (srtobject, headers, mapinfo);
} else {
len = gst_srt_object_write_one (srtobject, headers, mapinfo, error);
}
return len;
}
static GstStructure *
get_stats_for_srtsock (GstSRTObject * srtobject, SRTSOCKET srtsock)
{
GstStructure *s;
int ret;
SRT_TRACEBSTATS stats;
ret = srt_bstats (srtsock, &stats, 0);
if (ret < 0) {
GST_WARNING_OBJECT (srtobject->element,
"failed to retrieve stats for socket %d (reason %s)",
srtsock, srt_getlasterror_str ());
return NULL;
}
s = gst_structure_new ("application/x-srt-statistics",
/* number of sent data packets, including retransmissions */
"packets-sent", G_TYPE_INT64, stats.pktSent,
/* number of lost packets (sender side) */
"packets-sent-lost", G_TYPE_INT, stats.pktSndLoss,
/* number of retransmitted packets */
"packets-retransmitted", G_TYPE_INT, stats.pktRetrans,
/* number of received ACK packets */
"packet-ack-received", G_TYPE_INT, stats.pktRecvACK,
/* number of received NAK packets */
"packet-nack-received", G_TYPE_INT, stats.pktRecvNAK,
/* time duration when UDT is sending data (idle time exclusive) */
"send-duration-us", G_TYPE_INT64, stats.usSndDuration,
/* number of sent data bytes, including retransmissions */
"bytes-sent", G_TYPE_UINT64, stats.byteSent,
/* number of retransmitted bytes */
"bytes-retransmitted", G_TYPE_UINT64, stats.byteRetrans,
/* number of too-late-to-send dropped bytes */
"bytes-sent-dropped", G_TYPE_UINT64, stats.byteSndDrop,
/* number of too-late-to-send dropped packets */
"packets-sent-dropped", G_TYPE_INT, stats.pktSndDrop,
/* sending rate in Mb/s */
"send-rate-mbps", G_TYPE_DOUBLE, stats.mbpsSendRate,
/* busy sending time (i.e., idle time exclusive) */
"send-duration-us", G_TYPE_UINT64, stats.usSndDuration,
"negotiated-latency-ms", G_TYPE_INT, stats.msSndTsbPdDelay,
"packets-received", G_TYPE_INT64, stats.pktRecvTotal,
"packets-received-lost", G_TYPE_INT, stats.pktRcvLossTotal,
/* number of sent ACK packets */
"packet-ack-sent", G_TYPE_INT, stats.pktSentACK,
/* number of sent NAK packets */
"packet-nack-sent", G_TYPE_INT, stats.pktSentNAK,
"bytes-received", G_TYPE_UINT64, stats.byteRecvTotal,
"bytes-received-lost", G_TYPE_UINT64, stats.byteRcvLossTotal,
"receive-rate-mbps", G_TYPE_DOUBLE, stats.mbpsRecvRate,
"negotiated-latency-ms", G_TYPE_INT, stats.msRcvTsbPdDelay,
/* estimated bandwidth, in Mb/s */
"bandwidth-mbps", G_TYPE_DOUBLE, stats.mbpsBandwidth,
"rtt-ms", G_TYPE_DOUBLE, stats.msRTT, NULL);
GST_DEBUG_OBJECT (srtobject->element,
"retreived stats for socket %d: %" GST_PTR_FORMAT, srtsock, s);
return s;
}
GstStructure *
gst_srt_object_get_stats (GstSRTObject * srtobject)
{
GstStructure *s = NULL;
gboolean is_sender = GST_IS_BASE_SINK (srtobject->element);
g_mutex_lock (&srtobject->sock_lock);
if (srtobject->thread == NULL) {
/* Not a listening socket */
s = get_stats_for_srtsock (srtobject, srtobject->sock);
}
if (s == NULL) {
s = gst_structure_new_empty ("application/x-srt-statistics");
}
if (srtobject->callers) {
GValueArray *callers_stats = g_value_array_new (1);
GValue callers_stats_v = G_VALUE_INIT;
GList *item, *next;
for (item = srtobject->callers, next = NULL; item; item = next) {
SRTCaller *caller = item->data;
GstStructure *tmp;
GValue *v;
next = item->next;
tmp = get_stats_for_srtsock (srtobject, caller->sock);
if (tmp == NULL) {
srtobject->callers = g_list_delete_link (srtobject->callers, item);
srt_caller_signal_removed (caller, srtobject);
srt_caller_free (caller);
continue;
}
gst_structure_set (tmp, "caller-address", G_TYPE_SOCKET_ADDRESS,
caller->sockaddr, NULL);
g_value_array_append (callers_stats, NULL);
v = g_value_array_get_nth (callers_stats, callers_stats->n_values - 1);
g_value_init (v, GST_TYPE_STRUCTURE);
g_value_take_boxed (v, tmp);
}
g_value_init (&callers_stats_v, G_TYPE_VALUE_ARRAY);
g_value_take_boxed (&callers_stats_v, callers_stats);
gst_structure_take_value (s, "callers", &callers_stats_v);
}
gst_structure_set (s, is_sender ? "bytes-sent-total" : "bytes-received-total",
G_TYPE_UINT64, srtobject->bytes, NULL);
g_mutex_unlock (&srtobject->sock_lock);
return s;
}
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