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gstreamer/ext/srt/gstsrtobject.c
Mark Nauwelaerts dd3a25b473 srt: set cancellation in locked section 
... to avoid race with wait which uses it with 'flushing' flag state semantics.
2019-05-11 22:38:46 +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
#include "gstsrtobject.h"
#include <gio/gnetworking.h>
#include <stdlib.h>
GST_DEBUG_CATEGORY_EXTERN (gst_debug_srtobject);
#define GST_CAT_DEFAULT gst_debug_srtobject
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_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);
}
static void
srt_caller_invoke_removed_closure (SRTCaller * caller, GstSRTObject * srtobject)
{
GValue values[2] = { G_VALUE_INIT };
if (srtobject->caller_removed_closure == NULL) {
return;
}
g_value_init (&values[0], G_TYPE_INT);
g_value_set_int (&values[0], caller->sock);
g_value_init (&values[1], G_TYPE_SOCKET_ADDRESS);
g_value_set_object (&values[1], caller->sockaddr);
g_closure_invoke (srtobject->caller_removed_closure, NULL, 2, values, NULL);
g_value_unset (&values[0]);
g_value_unset (&values[1]);
}
struct srt_constant_params
{
const gchar *name;
gint param;
gint val;
};
static struct srt_constant_params srt_params[] = {
{"SRTO_SNDSYN", SRTO_SNDSYN, 0}, /* 0: non-blocking */
{"SRTO_RCVSYN", SRTO_RCVSYN, 0}, /* 0: non-blocking */
{"SRTO_LINGER", SRTO_LINGER, 0},
{"SRTO_TSBPMODE", SRTO_TSBPDMODE, 1}, /* Timestamp-based Packet Delivery mode must be enabled */
{NULL, -1, -1},
};
static gint srt_init_refcount = 0;
static gboolean
gst_srt_object_set_common_params (SRTSOCKET sock, GstSRTObject * srtobject,
GError ** error)
{
struct srt_constant_params *params = srt_params;
for (; params->name != NULL; params++) {
if (srt_setsockopt (sock, 0, params->param, &params->val, sizeof (gint))) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS,
"failed to set %s (reason: %s)", params->name,
srt_getlasterror_str ());
return FALSE;
}
}
if (srtobject->passphrase != NULL && srtobject->passphrase[0] != '\0') {
gint pbkeylen;
if (srt_setsockopt (sock, 0, SRTO_PASSPHRASE, srtobject->passphrase,
strlen (srtobject->passphrase))) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS,
"failed to set passphrase (reason: %s)", srt_getlasterror_str ());
return FALSE;
}
if (!gst_structure_get_int (srtobject->parameters, "pbkeylen", &pbkeylen)) {
pbkeylen = GST_SRT_DEFAULT_PBKEYLEN;
}
if (srt_setsockopt (sock, 0, SRTO_PBKEYLEN, &pbkeylen, sizeof (int))) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS,
"failed to set pbkeylen (reason: %s)", srt_getlasterror_str ());
return FALSE;
}
}
return TRUE;
}
GstSRTObject *
gst_srt_object_new (GstElement * element)
{
GstSRTObject *srtobject;
if (g_atomic_int_get (&srt_init_refcount) == 0) {
GST_DEBUG_OBJECT (element, "Starting up SRT");
if (srt_startup () != 0) {
g_warning ("Failed to initialize SRT (reason: %s)",
srt_getlasterror_str ());
}
}
g_atomic_int_inc (&srt_init_refcount);
srtobject = g_new0 (GstSRTObject, 1);
srtobject->element = element;
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,
"mode", GST_TYPE_SRT_CONNECTION_MODE, GST_SRT_DEFAULT_MODE, NULL);
srtobject->sock = SRT_INVALID_SOCK;
srtobject->poll_id = srt_epoll_create ();
srtobject->listener_sock = SRT_INVALID_SOCK;
srtobject->listener_poll_id = SRT_ERROR;
srtobject->sent_headers = FALSE;
g_cond_init (&srtobject->sock_cond);
return srtobject;
}
void
gst_srt_object_destroy (GstSRTObject * srtobject)
{
g_return_if_fail (srtobject != NULL);
if (srtobject->poll_id != SRT_ERROR) {
srt_epoll_release (srtobject->poll_id);
srtobject->poll_id = SRT_ERROR;
}
g_cond_clear (&srtobject->sock_cond);
GST_DEBUG_OBJECT (srtobject->element, "Destroying srtobject");
gst_structure_free (srtobject->parameters);
g_free (srtobject->passphrase);
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_free (srtobject);
}
gboolean
gst_srt_object_set_property_helper (GstSRTObject * srtobject,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
case PROP_URI:{
const gchar *uri = g_value_get_string (value);
gst_srt_object_set_uri (srtobject, uri, 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_MSG_SIZE:
gst_structure_set_value (srtobject->parameters, "msg-size", 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:
g_free (srtobject->passphrase);
srtobject->passphrase = g_value_dup_string (value);
break;
case PROP_PBKEYLEN:
gst_structure_set_value (srtobject->parameters, "pbkeylen", value);
break;
default:
return FALSE;
}
return TRUE;
}
gboolean
gst_srt_object_get_property_helper (GstSRTObject * srtobject,
guint prop_id, GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
case PROP_URI:
g_value_take_string (value, gst_uri_to_string (srtobject->uri));
break;
case PROP_MODE:{
GstSRTConnectionMode v;
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);
break;
}
case PROP_LOCALADDRESS:
g_value_set_string (value,
gst_structure_get_string (srtobject->parameters, "localaddress"));
break;
case PROP_LOCALPORT:{
guint v;
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);
break;
}
case PROP_PBKEYLEN:{
GstSRTKeyLength v;
if (!gst_structure_get_enum (srtobject->parameters, "pbkeylen",
GST_TYPE_SRT_KEY_LENGTH, (gint *) & v)) {
GST_WARNING_OBJECT (srtobject->element, "Failed to get 'pbkeylen'");
v = GST_SRT_KEY_LENGTH_NO_KEY;
}
g_value_set_enum (value, v);
break;
}
case PROP_POLL_TIMEOUT:{
gint v;
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);
break;
}
case PROP_LATENCY:{
gint v;
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);
break;
}
case PROP_MSG_SIZE:{
gint v;
if (!gst_structure_get_int (srtobject->parameters, "msg-size", &v)) {
GST_WARNING_OBJECT (srtobject->element, "Failed to get 'msg-size'");
v = GST_SRT_DEFAULT_MSG_SIZE;
}
g_value_set_int (value, v);
break;
}
case PROP_STATS:
g_value_take_boxed (value, gst_srt_object_get_stats (srtobject));
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));
/**
* 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));
/**
* 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 miliseconds (-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:msg-size:
*
* The message size of buffer.
*/
g_object_class_install_property (gobject_class, PROP_MSG_SIZE,
g_param_spec_int ("msg-size", "message size",
"Message size to use with SRT", 1,
G_MAXINT32, GST_SRT_DEFAULT_MSG_SIZE,
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));
}
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) {
GValue v = G_VALUE_INIT;
g_value_init (&v, enum_type);
g_value_set_enum (&v, enum_value->value);
gst_structure_set_value (s, key, &v);
}
g_type_class_unref (enum_class);
}
static void
gst_srt_object_set_string_value (GstStructure * s, const gchar * key,
const gchar * value)
{
GValue v = G_VALUE_INIT;
g_value_init (&v, G_TYPE_STRING);
g_value_set_static_string (&v, value);
gst_structure_set_value (s, key, &v);
g_value_unset (&v);
}
static void
gst_srt_object_set_uint_value (GstStructure * s, const gchar * key,
const gchar * value)
{
GValue v = G_VALUE_INIT;
g_value_init (&v, G_TYPE_UINT);
g_value_set_uint (&v, (guint) strtoul (value, NULL, 10));
gst_structure_set_value (s, key, &v);
g_value_unset (&v);
}
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);
}
}
}
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);
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 ("passphrase", key)) {
g_free (srtobject->passphrase);
srtobject->passphrase = g_strdup (value);
} else if (!g_strcmp0 ("pbkeylen", key)) {
gst_srt_object_set_enum_value (srtobject->parameters,
GST_TYPE_SRT_KEY_LENGTH, 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;
g_main_loop_run (srtobject->loop);
return NULL;
}
static gboolean
idle_listen_source_cb (gpointer data)
{
GstSRTObject *srtobject = data;
SRTSOCKET caller_sock;
struct sockaddr caller_sa;
gsize caller_sa_len;
gint poll_timeout;
SRTSOCKET rsock;
gint rsocklen = 1;
if (!gst_structure_get_int (srtobject->parameters, "poll-timeout",
&poll_timeout)) {
poll_timeout = GST_SRT_DEFAULT_POLL_TIMEOUT;
}
GST_DEBUG_OBJECT (srtobject->element, "Waiting a request from caller");
if (srt_epoll_wait (srtobject->listener_poll_id, &rsock,
&rsocklen, 0, 0, poll_timeout, NULL, 0, NULL, 0) < 0) {
gint srt_errno = srt_getlasterror (NULL);
if (srt_errno == SRT_ETIMEOUT) {
return TRUE;
} else {
GST_ELEMENT_ERROR (srtobject->element, RESOURCE, FAILED,
("abort polling: %s", srt_getlasterror_str ()), (NULL));
return FALSE;
}
}
caller_sock =
srt_accept (srtobject->listener_sock, &caller_sa, (int *) &caller_sa_len);
if (caller_sock != SRT_INVALID_SOCK) {
SRTCaller *caller;
gint flag = SRT_EPOLL_ERR;
caller = srt_caller_new ();
caller->sockaddr =
g_socket_address_new_from_native (&caller_sa, caller_sa_len);
caller->poll_id = srt_epoll_create ();
caller->sock = caller_sock;
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)) {
GST_ELEMENT_ERROR (srtobject->element, RESOURCE, SETTINGS,
("%s", srt_getlasterror_str ()), (NULL));
srt_caller_free (caller);
/* try-again */
return TRUE;
}
GST_OBJECT_LOCK (srtobject->element);
srtobject->callers = g_list_append (srtobject->callers, caller);
g_cond_signal (&srtobject->sock_cond);
GST_OBJECT_UNLOCK (srtobject->element);
/* notifying caller-added */
if (srtobject->caller_added_closure != NULL) {
GValue values[2] = { G_VALUE_INIT, G_VALUE_INIT };
g_value_init (&values[0], G_TYPE_INT);
g_value_set_int (&values[0], caller->sock);
g_value_init (&values[1], G_TYPE_SOCKET_ADDRESS);
g_value_set_object (&values[1], caller->sockaddr);
g_closure_invoke (srtobject->caller_added_closure, NULL, 2, values, NULL);
g_value_unset (&values[1]);
}
GST_DEBUG_OBJECT (srtobject->element, "Accept to connect");
}
/* only one caller is allowed if the element is source. */
return gst_uri_handler_get_uri_type (GST_URI_HANDLER (srtobject->element)) !=
GST_URI_SRC;
}
static gboolean
gst_srt_object_wait_connect (GstSRTObject * srtobject,
GCancellable * cancellable, 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;
gpointer bind_sa;
gsize bind_sa_len;
GSocketAddress *bind_addr;
gst_structure_get_uint (srtobject->parameters, "localport", &local_port);
local_address =
gst_structure_get_string (srtobject->parameters, "localaddress");
bind_addr = g_inet_socket_address_new_from_string (local_address, local_port);
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_socket (AF_INET, SOCK_DGRAM, 0);
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->listener_poll_id, sock, &sock_flags)) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS, "%s",
srt_getlasterror_str ());
goto failed;
}
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->listener_sock = sock;
srtobject->context = g_main_context_new ();
srtobject->loop = g_main_loop_new (srtobject->context, TRUE);
srtobject->listener_source = g_idle_source_new ();
g_source_set_callback (srtobject->listener_source,
(GSourceFunc) idle_listen_source_cb, srtobject, NULL);
g_source_attach (srtobject->listener_source, srtobject->context);
srtobject->thread =
g_thread_try_new ("GstSRTObjectListener", thread_func, srtobject, error);
if (*error != NULL) {
goto failed;
}
return TRUE;
failed:
g_clear_pointer (&srtobject->loop, g_main_loop_unref);
g_clear_pointer (&srtobject->context, g_main_context_unref);
if (srtobject->listener_poll_id != SRT_ERROR) {
srt_epoll_release (srtobject->listener_poll_id);
}
if (sock != SRT_INVALID_SOCK) {
srt_close (sock);
}
g_clear_object (&bind_addr);
srtobject->listener_poll_id = SRT_ERROR;
srtobject->listener_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 option_val = -1;
gint sock_flags = SRT_EPOLL_ERR;
guint local_port = 0;
const gchar *local_address = NULL;
sock = srt_socket (AF_INET, SOCK_DGRAM, 0);
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;
}
switch (gst_uri_handler_get_uri_type (GST_URI_HANDLER (srtobject->element))) {
case GST_URI_SRC:
option_val = 0;
sock_flags |= SRT_EPOLL_IN;
break;
case GST_URI_SINK:
option_val = 1;
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, &option_val, sizeof (gint))) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS, "%s",
srt_getlasterror_str ());
goto failed;
}
option_val = (connection_mode == GST_SRT_CONNECTION_MODE_RENDEZVOUS);
if (srt_setsockopt (sock, 0, SRTO_RENDEZVOUS, &option_val, sizeof (gint))) {
g_set_error (error, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_SETTINGS, "%s",
srt_getlasterror_str ());
goto failed;
}
gst_structure_get_uint (srtobject->parameters, "localport", &local_port);
local_address =
gst_structure_get_string (srtobject->parameters, "localaddress");
/* 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 =
g_inet_socket_address_new_from_string (local_address,
local_port);
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)) {
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 ());
goto failed;
}
srtobject->sock = sock;
return TRUE;
failed:
if (srtobject->poll_id != SRT_ERROR) {
srt_epoll_release (srtobject->poll_id);
}
if (sock != SRT_INVALID_SOCK) {
srt_close (sock);
}
srtobject->poll_id = SRT_ERROR;
srtobject->sock = SRT_INVALID_SOCK;
return FALSE;
}
static gboolean
gst_srt_object_open_connection (GstSRTObject * srtobject,
GCancellable * cancellable, GstSRTConnectionMode connection_mode,
gpointer sa, size_t sa_len, GError ** error)
{
gboolean ret = FALSE;
if (connection_mode == GST_SRT_CONNECTION_MODE_LISTENER) {
ret =
gst_srt_object_wait_connect (srtobject, cancellable, sa, sa_len, error);
} else {
ret =
gst_srt_object_connect (srtobject, connection_mode, sa, sa_len, error);
}
return ret;
}
gboolean
gst_srt_object_open (GstSRTObject * srtobject, GCancellable * cancellable,
GError ** error)
{
return gst_srt_object_open_full (srtobject, NULL, NULL, cancellable, error);
}
gboolean
gst_srt_object_open_full (GstSRTObject * srtobject,
GstSRTObjectCallerAdded caller_added_func,
GstSRTObjectCallerRemoved caller_removed_func,
GCancellable * cancellable, GError ** error)
{
GSocketAddress *socket_address = NULL;
GstSRTConnectionMode connection_mode = GST_SRT_CONNECTION_MODE_NONE;
gpointer sa;
size_t sa_len;
const gchar *addr_str;
srtobject->opened = FALSE;
if (caller_added_func != NULL) {
srtobject->caller_added_closure =
g_cclosure_new (G_CALLBACK (caller_added_func), srtobject, NULL);
g_closure_set_marshal (srtobject->caller_added_closure,
g_cclosure_marshal_generic);
}
if (caller_removed_func != NULL) {
srtobject->caller_removed_closure =
g_cclosure_new (G_CALLBACK (caller_removed_func), srtobject, NULL);
g_closure_set_marshal (srtobject->caller_removed_closure,
g_cclosure_marshal_generic);
}
addr_str = gst_uri_get_host (srtobject->uri);
if (addr_str == NULL) {
addr_str = "0.0.0.0";
GST_DEBUG_OBJECT (srtobject->element,
"Given uri doesn't have hostname or address. Use any (%s) and"
" setting listener mode", addr_str);
}
socket_address =
g_inet_socket_address_new_from_string (addr_str,
gst_uri_get_port (srtobject->uri));
if (socket_address == NULL) {
g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_OPEN_READ,
"Invalid host");
goto out;
}
/* FIXME: Unfortunately, SRT doesn't support IPv4 currently. */
if (g_socket_address_get_family (socket_address) != G_SOCKET_FAMILY_IPV4) {
g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_OPEN_READ,
"SRT supports IPv4 only");
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;
}
GST_DEBUG_OBJECT (srtobject->element,
"Opening SRT socket with parameters: %" GST_PTR_FORMAT,
srtobject->parameters);
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_TYPE_SRT_CONNECTION_MODE;
}
srtobject->listener_poll_id = srt_epoll_create ();
srtobject->opened =
gst_srt_object_open_connection
(srtobject, cancellable, connection_mode, sa, sa_len, error);
out:
g_clear_object (&socket_address);
return srtobject->opened;
}
void
gst_srt_object_close (GstSRTObject * srtobject)
{
if (srtobject->poll_id != SRT_ERROR) {
srt_epoll_remove_usock (srtobject->poll_id, srtobject->sock);
}
if (srtobject->sock != SRT_INVALID_SOCK) {
GST_DEBUG_OBJECT (srtobject->element, "Closing SRT socket (0x%x)",
srtobject->sock);
srt_close (srtobject->sock);
srtobject->sock = SRT_INVALID_SOCK;
}
if (srtobject->loop) {
g_main_loop_quit (srtobject->loop);
if (srtobject->listener_poll_id != SRT_ERROR) {
srt_epoll_remove_usock (srtobject->listener_poll_id,
srtobject->listener_sock);
srtobject->listener_poll_id = SRT_ERROR;
}
g_thread_join (srtobject->thread);
g_clear_pointer (&srtobject->thread, g_thread_unref);
g_clear_pointer (&srtobject->loop, g_main_loop_unref);
g_clear_pointer (&srtobject->context, g_main_context_unref);
}
if (srtobject->listener_sock != SRT_INVALID_SOCK) {
GST_DEBUG_OBJECT (srtobject->element, "Closing SRT listener socket (0x%x)",
srtobject->listener_sock);
srt_close (srtobject->listener_sock);
srtobject->listener_sock = SRT_INVALID_SOCK;
}
g_list_foreach (srtobject->callers, (GFunc) srt_caller_invoke_removed_closure,
srtobject);
g_list_free_full (srtobject->callers, (GDestroyNotify) srt_caller_free);
g_clear_pointer (&srtobject->caller_added_closure, g_closure_unref);
g_clear_pointer (&srtobject->caller_removed_closure, g_closure_unref);
srtobject->opened = FALSE;
}
static gboolean
gst_srt_object_wait_caller (GstSRTObject * srtobject,
GCancellable * cancellable, GError ** errorj)
{
gboolean ret = FALSE;
GST_DEBUG_OBJECT (srtobject->element, "Waiting connection from caller");
GST_OBJECT_LOCK (srtobject->element);
while (!g_cancellable_is_cancelled (cancellable)) {
ret = g_list_length (srtobject->callers) >= 1;
if (ret)
break;
g_cond_wait (&srtobject->sock_cond,
GST_OBJECT_GET_LOCK (srtobject->element));
}
GST_OBJECT_UNLOCK (srtobject->element);
GST_DEBUG_OBJECT (srtobject->element, "got %s connection", ret ? "a" : "no");
return ret;
}
gssize
gst_srt_object_read (GstSRTObject * srtobject,
guint8 * data, gsize size, GCancellable * cancellable, GError ** error)
{
gssize len = 0;
gint poll_timeout;
gint msg_size;
GstSRTConnectionMode connection_mode = GST_SRT_CONNECTION_MODE_NONE;
gint poll_id;
/* 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_structure_get_enum (srtobject->parameters, "mode",
GST_TYPE_SRT_CONNECTION_MODE, (gint *) & connection_mode);
if (connection_mode == GST_SRT_CONNECTION_MODE_LISTENER) {
SRTCaller *caller;
if (!gst_srt_object_wait_caller (srtobject, cancellable, error))
return -1;
caller = srtobject->callers->data;
poll_id = caller->poll_id;
} else {
poll_id = srtobject->poll_id;
}
if (!gst_structure_get_int (srtobject->parameters, "poll-timeout",
&poll_timeout)) {
poll_timeout = GST_SRT_DEFAULT_POLL_TIMEOUT;
}
if (!gst_structure_get_int (srtobject->parameters, "msg-size", &msg_size)) {
msg_size = GST_SRT_DEFAULT_MSG_SIZE;
}
while (!g_cancellable_is_cancelled (cancellable)) {
SRTSOCKET rsock;
gint rsocklen = 1;
if (srt_epoll_wait (poll_id, &rsock,
&rsocklen, 0, 0, poll_timeout, NULL, 0, NULL, 0) < 0) {
continue;
}
if (rsocklen < 0) {
GST_WARNING_OBJECT (srtobject->element,
"abnormal SRT socket is detected");
srt_close (rsock);
}
switch (srt_getsockstate (rsock)) {
case SRTS_BROKEN:
case SRTS_NONEXIST:
case SRTS_CLOSED:
if (connection_mode == GST_SRT_CONNECTION_MODE_LISTENER) {
/* Caller has been disappeared. */
return 0;
} else {
GST_WARNING_OBJECT (srtobject->element,
"Invalid SRT socket. Trying to reconnect");
gst_srt_object_close (srtobject);
if (!gst_srt_object_open (srtobject, cancellable, error)) {
return -1;
}
continue;
}
case SRTS_CONNECTED:
/* good to go */
break;
default:
/* not-ready */
continue;
}
while (len < size) {
gint recv;
gint rest = size - len;
/* Workaround for SRT being unhappy about buffers that
* are less than the chunk size */
if (rest < msg_size)
goto out;
recv = srt_recvmsg (rsock, (char *) (data + len), rest);
if (recv <= 0)
goto out;
len += recv;
}
}
out:
return len;
}
void
gst_srt_object_wakeup (GstSRTObject * srtobject, GCancellable * cancellable)
{
GST_DEBUG_OBJECT (srtobject->element, "waking up SRT");
/* Removing all socket descriptors from the monitoring list
* wakes up SRT's threads. We only have one to remove. */
srt_epoll_remove_usock (srtobject->poll_id, srtobject->sock);
/* connection is only waited for in listener mode,
* but there is no harm in raising signal in any case */
GST_OBJECT_LOCK (srtobject->element);
/* 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 (cancellable);
g_cond_signal (&srtobject->sock_cond);
GST_OBJECT_UNLOCK (srtobject->element);
}
static gboolean
gst_srt_object_send_headers (GstSRTObject * srtobject, SRTSOCKET sock,
gint poll_id, gint poll_timeout, GstBufferList * headers,
GCancellable * cancellable)
{
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;
GstBuffer *buffer = gst_buffer_list_get (headers, i);
GstMapInfo mapinfo;
if (g_cancellable_is_cancelled (cancellable)) {
return FALSE;
}
if (poll_id > 0 && srt_epoll_wait (poll_id, 0, 0, &wsock,
&wsocklen, poll_timeout, NULL, 0, NULL, 0) < 0) {
continue;
}
GST_TRACE_OBJECT (srtobject->element, "sending header %u %" GST_PTR_FORMAT,
i, buffer);
if (!gst_buffer_map (buffer, &mapinfo, GST_MAP_READ)) {
GST_ELEMENT_ERROR (srtobject->element, RESOURCE, READ,
("Could not map the input stream"), (NULL));
return FALSE;
}
if (srt_sendmsg2 (wsock, (char *) mapinfo.data, mapinfo.size,
0) == SRT_ERROR) {
GST_ELEMENT_ERROR (srtobject->element, RESOURCE, WRITE, NULL,
("%s", srt_getlasterror_str ()));
gst_buffer_unmap (buffer, &mapinfo);
return FALSE;
}
gst_buffer_unmap (buffer, &mapinfo);
}
return TRUE;
}
static gssize
gst_srt_object_write_to_callers (GstSRTObject * srtobject,
GstBufferList * headers,
const GstMapInfo * mapinfo, GCancellable * cancellable, GError ** error)
{
GList *callers;
GST_OBJECT_LOCK (srtobject->element);
callers = srtobject->callers;
while (callers != NULL) {
gssize len = 0;
const guint8 *msg = mapinfo->data;
gint sent;
SRTCaller *caller = callers->data;
callers = callers->next;
if (g_cancellable_is_cancelled (cancellable)) {
GST_OBJECT_UNLOCK (srtobject->element);
return -1;
}
if (!caller->sent_headers) {
if (!gst_srt_object_send_headers (srtobject, caller->sock, -1,
-1, headers, cancellable)) {
goto err;
}
caller->sent_headers = TRUE;
}
while (len < mapinfo->size) {
gint rest = mapinfo->size - len;
sent = srt_sendmsg2 (caller->sock, (char *) (msg + len), rest, 0);
if (sent < 0) {
goto err;
}
len += sent;
}
continue;
err:
srtobject->callers = g_list_remove (srtobject->callers, caller);
srt_caller_invoke_removed_closure (caller, srtobject);
GST_OBJECT_UNLOCK (srtobject->element);
srt_caller_free (caller);
GST_OBJECT_LOCK (srtobject->element);
}
GST_OBJECT_UNLOCK (srtobject->element);
return mapinfo->size;
}
static gssize
gst_srt_object_write_one (GstSRTObject * srtobject,
GstBufferList * headers,
const GstMapInfo * mapinfo, GCancellable * cancellable, GError ** error)
{
gssize len = 0;
gint poll_timeout;
const guint8 *msg = mapinfo->data;
if (!gst_structure_get_int (srtobject->parameters, "poll-timeout",
&poll_timeout)) {
poll_timeout = GST_SRT_DEFAULT_POLL_TIMEOUT;
}
if (!srtobject->sent_headers) {
if (!gst_srt_object_send_headers (srtobject, srtobject->sock,
srtobject->poll_id, poll_timeout, headers, cancellable)) {
return -1;
}
srtobject->sent_headers = TRUE;
}
while (len < mapinfo->size) {
SRTSOCKET wsock;
gint wsocklen = 1;
gint sent;
gint rest = mapinfo->size - len;
if (g_cancellable_is_cancelled (cancellable)) {
break;
}
if (srt_epoll_wait (srtobject->poll_id, 0, 0, &wsock,
&wsocklen, poll_timeout, NULL, 0, NULL, 0) < 0) {
continue;
}
switch (srt_getsockstate (wsock)) {
case SRTS_BROKEN:
case SRTS_NONEXIST:
case SRTS_CLOSED:
GST_WARNING_OBJECT (srtobject->element,
"Invalid SRT socket. Trying to reconnect");
gst_srt_object_close (srtobject);
if (!gst_srt_object_open (srtobject, cancellable, error)) {
return -1;
}
continue;
case SRTS_CONNECTED:
/* good to go */
GST_LOG_OBJECT (srtobject->element, "good to go");
break;
default:
GST_WARNING_OBJECT (srtobject->element, "not ready");
/* not-ready */
continue;
}
sent = srt_sendmsg2 (wsock, (char *) (msg + len), rest, 0);
if (sent < 0) {
GST_ELEMENT_ERROR (srtobject->element, RESOURCE, WRITE, NULL,
("%s", srt_getlasterror_str ()));
break;
}
len += sent;
}
return len;
}
gssize
gst_srt_object_write (GstSRTObject * srtobject,
GstBufferList * headers,
const GstMapInfo * mapinfo, GCancellable * cancellable, GError ** error)
{
gssize len = 0;
GstSRTConnectionMode connection_mode = GST_SRT_CONNECTION_MODE_NONE;
/* 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_structure_get_enum (srtobject->parameters, "mode",
GST_TYPE_SRT_CONNECTION_MODE, (gint *) & connection_mode);
if (connection_mode == GST_SRT_CONNECTION_MODE_LISTENER) {
if (!gst_srt_object_wait_caller (srtobject, cancellable, error))
return -1;
len =
gst_srt_object_write_to_callers (srtobject, headers, mapinfo,
cancellable, error);
} else {
len =
gst_srt_object_write_one (srtobject, headers, mapinfo, cancellable,
error);
}
return len;
}
GstStructure *
gst_srt_object_get_stats (GstSRTObject * srtobject)
{
SRT_TRACEBSTATS stats;
int ret;
GstStructure *s = gst_structure_new_empty ("application/x-srt-statistics");
/* FIXME: what if ruinning on listener mode */
if (srtobject->sock == SRT_INVALID_SOCK)
return s;
ret = srt_bstats (srtobject->sock, &stats, 0);
if (ret >= 0) {
gst_structure_set (s,
/* 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.msRTT,
/* estimated bandwidth, in Mb/s */
"bandwidth-mbps", G_TYPE_DOUBLE, stats.mbpsBandwidth,
/* busy sending time (i.e., idle time exclusive) */
"send-duration-us", G_TYPE_UINT64, stats.usSndDuration,
"rtt-ms", G_TYPE_DOUBLE, stats.msRTT,
"negotiated-latency-ms", G_TYPE_INT, stats.msSndTsbPdDelay, NULL);
}
return s;
}
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