-/*****************************************************************************\r
- * netsync.c: synchronisation between several network clients.\r
- *****************************************************************************\r
- * Copyright (C) 2004 VideoLAN\r
- * $Id$\r
- *\r
- * Authors: Gildas Bazin <gbazin@videolan.org>\r
- *\r
- * This program is free software; you can redistribute it and/or modify\r
- * it under the terms of the GNU General Public License as published by\r
- * the Free Software Foundation; either version 2 of the License, or\r
- * (at your option) any later version.\r
- *\r
- * This program is distributed in the hope that it will be useful,\r
- * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
- * GNU General Public License for more details.\r
- *\r
- * You should have received a copy of the GNU General Public License\r
- * along with this program; if not, write to the Free Software\r
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.\r
- *****************************************************************************/\r
-\r
-/*****************************************************************************\r
- * Preamble\r
- *****************************************************************************/\r
-#include <stdlib.h>\r
-#include <vlc/vlc.h>\r
-#include <vlc/intf.h>\r
-\r
-#ifdef HAVE_UNISTD_H\r
-# include <unistd.h>\r
-#endif\r
-\r
-#ifdef HAVE_SYS_TIME_H\r
-# include <sys/time.h>\r
-#endif\r
-#include <sys/types.h>\r
-\r
-#ifdef WIN32\r
-# include <winsock2.h>\r
-# include <ws2tcpip.h>\r
-# ifndef IN_MULTICAST\r
-# define IN_MULTICAST(a) IN_CLASSD(a)\r
-# endif\r
-#else\r
-# include <sys/socket.h>\r
-# include <netinet/in.h>\r
-# if HAVE_ARPA_INET_H\r
-# include <arpa/inet.h>\r
-# elif defined( SYS_BEOS )\r
-# include <net/netdb.h>\r
-# endif\r
-#endif\r
-\r
-#ifdef UNDER_CE\r
-# define close(a) CloseHandle(a);\r
-#elif defined( WIN32 )\r
-# define close(a) closesocket(a);\r
-#endif\r
-\r
-#include "network.h"\r
-#include "input_ext-plugins.h"\r
-\r
-#define NETSYNC_PORT_MASTER 9875\r
-#define NETSYNC_PORT_SLAVE 9876\r
-\r
-/*****************************************************************************\r
- * Module descriptor\r
- *****************************************************************************/\r
-static int Activate( vlc_object_t * );\r
-static void Close ( vlc_object_t * );\r
-\r
-static mtime_t GetClockRef( intf_thread_t *, mtime_t );\r
-\r
-#define NETSYNC_TEXT N_( "Act as master for network synchronisation" )\r
-#define NETSYNC_LONGTEXT N_( "Allows you to specify if this client should " \\r
- "act as the master client for the network synchronisation." )\r
-\r
-#define MIP_TEXT N_( "Master client ip address" )\r
-#define MIP_LONGTEXT N_( "Allows you to specify the ip address of " \\r
- "the master client used for the network synchronisation." )\r
-\r
-vlc_module_begin();\r
- set_description( _("Network synchronisation") );\r
-\r
- add_bool( "netsync-master", 0, NULL,\r
- NETSYNC_TEXT, NETSYNC_LONGTEXT, VLC_TRUE );\r
- add_string( "netsync-master-ip", NULL, NULL, MIP_TEXT, MIP_LONGTEXT,\r
- VLC_TRUE );\r
-\r
- set_capability( "interface", 0 );\r
- set_callbacks( Activate, Close );\r
-vlc_module_end();\r
-\r
-struct intf_sys_t\r
-{\r
- input_thread_t *p_input;\r
-};\r
-\r
-/*****************************************************************************\r
- * Local prototypes\r
- *****************************************************************************/\r
-static void Run( intf_thread_t *p_intf );\r
-\r
-/*****************************************************************************\r
- * Activate: initialize and create stuff\r
- *****************************************************************************/\r
-static int Activate( vlc_object_t *p_this )\r
-{\r
- intf_thread_t *p_intf = (intf_thread_t*)p_this;\r
-\r
- msg_Info( p_intf, "Using the netsync interface module..." );\r
-\r
- p_intf->p_sys = malloc( sizeof( intf_sys_t ) );\r
- if( !p_intf->p_sys )\r
- {\r
- msg_Err( p_intf, "no memory" );\r
- return VLC_ENOMEM;\r
- }\r
-\r
- p_intf->p_sys->p_input = NULL;\r
-\r
- p_intf->pf_run = Run;\r
- return VLC_SUCCESS;\r
-}\r
-\r
-/*****************************************************************************\r
- * Close: destroy interface\r
- *****************************************************************************/\r
-void Close( vlc_object_t *p_this )\r
-{\r
- intf_thread_t *p_intf = (intf_thread_t*)p_this;\r
-\r
- free( p_intf->p_sys );\r
-}\r
-\r
-/*****************************************************************************\r
- * Run: interface thread\r
- *****************************************************************************/\r
-static void Run( intf_thread_t *p_intf )\r
-{\r
-#define MAX_MSG_LENGTH (2 * sizeof(int64_t))\r
-\r
- vlc_bool_t b_master = config_GetInt( p_intf, "netsync-master" );\r
- char *psz_master = config_GetPsz( p_intf, "netsync-master-ip" );\r
- struct sockaddr_in master_addr;\r
- char p_data[MAX_MSG_LENGTH];\r
- int i_socket;\r
-\r
- if( !b_master && (!psz_master || inet_addr( psz_master ) == INADDR_NONE) )\r
- {\r
- if( psz_master ) free( psz_master );\r
- msg_Err( p_intf, "invalid master address." );\r
- return;\r
- }\r
-\r
- memset( &master_addr, 0, sizeof( struct sockaddr_in ) );\r
- master_addr.sin_family = AF_INET;\r
- master_addr.sin_port = htons( (uint16_t)NETSYNC_PORT_MASTER );\r
- master_addr.sin_addr.s_addr = inet_addr( psz_master );\r
- free( psz_master );\r
-\r
- i_socket = net_OpenUDP( p_intf, NULL, b_master ? NETSYNC_PORT_MASTER :\r
- NETSYNC_PORT_SLAVE, NULL, 0 );\r
- if( i_socket < 0 )\r
- {\r
- msg_Err( p_intf, "failed opening UDP socket." );\r
- return;\r
- }\r
-\r
- /* High priority thread */\r
- vlc_thread_set_priority( p_intf, VLC_THREAD_PRIORITY_INPUT );\r
-\r
- while( !p_intf->b_die )\r
- {\r
- struct timeval timeout;\r
- fd_set fds_r;\r
-\r
- /* Update the input */\r
- if( p_intf->p_sys->p_input == NULL )\r
- {\r
- p_intf->p_sys->p_input =\r
- (input_thread_t *)vlc_object_find( p_intf, VLC_OBJECT_INPUT,\r
- FIND_ANYWHERE );\r
- }\r
- else if( p_intf->p_sys->p_input->b_dead )\r
- {\r
- vlc_object_release( p_intf->p_sys->p_input );\r
- p_intf->p_sys->p_input = NULL;\r
- }\r
-\r
- if( p_intf->p_sys->p_input == NULL )\r
- {\r
- /* Wait a bit */\r
- msleep( INTF_IDLE_SLEEP );\r
- continue;\r
- }\r
-\r
- /*\r
- * We now have an input\r
- */\r
-\r
- /* Initialize file descriptor set and timeout (0.5s) */\r
- FD_ZERO( &fds_r );\r
- FD_SET( i_socket, &fds_r );\r
- timeout.tv_sec = 0;\r
- timeout.tv_usec = 500000;\r
-\r
- if( b_master )\r
- {\r
- struct sockaddr_in from;\r
- mtime_t i_date, i_clockref, i_master_clockref;\r
- int i_struct_size, i_read, i_ret;\r
-\r
- /* Don't block */\r
- i_ret = select( i_socket + 1, &fds_r, 0, 0, &timeout );\r
- if( i_ret == 0 ) continue;\r
- if( i_ret < 0 )\r
- {\r
- /* Wait a bit */\r
- msleep( INTF_IDLE_SLEEP );\r
- continue;\r
- }\r
-\r
- /* We received something */\r
- i_struct_size = sizeof(struct sockaddr_in);\r
- i_read = recvfrom( i_socket, p_data, MAX_MSG_LENGTH, 0,\r
- (struct sockaddr*)&from, &i_struct_size );\r
-\r
- from.sin_port = htons( (uint16_t)NETSYNC_PORT_SLAVE );\r
-\r
- i_clockref = ntoh64(*(int64_t *)p_data);\r
-\r
- i_date = mdate();\r
- *(int64_t *)p_data = hton64( i_date );\r
-\r
- i_master_clockref = GetClockRef( p_intf, i_clockref );\r
- *(((int64_t *)p_data)+1) = hton64( i_master_clockref );\r
-\r
- /* Reply to the sender */\r
- sendto( i_socket, p_data, 2 * sizeof(int64_t), 0,\r
- (struct sockaddr *)&from, sizeof(struct sockaddr_in) );\r
-\r
- msg_Dbg( p_intf, "Master clockref: "I64Fd" -> "I64Fd", from %s "\r
- "(date: "I64Fd")", i_clockref, i_master_clockref, \r
- inet_ntoa(from.sin_addr), i_date );\r
- }\r
- else\r
- {\r
- mtime_t i_send_date, i_receive_date, i_master_date, i_diff_date;\r
- mtime_t i_master_clockref, i_client_clockref, i_drift;\r
- mtime_t i_clockref = 0;\r
- int i_sent, i_read, i_ret;\r
-\r
- /* Send clock request to the master */\r
- *(int64_t *)p_data = hton64( i_clockref );\r
- i_send_date = mdate();\r
-\r
- i_sent = sendto( i_socket, p_data, sizeof(int64_t), 0,\r
- (struct sockaddr *)&master_addr,\r
- sizeof(struct sockaddr_in) );\r
- if( i_sent <= 0 )\r
- {\r
- /* Wait a bit */\r
- msleep( INTF_IDLE_SLEEP );\r
- continue;\r
- }\r
-\r
- /* Don't block */\r
- i_ret = select(i_socket + 1, &fds_r, 0, 0, &timeout);\r
- if( i_ret == 0 ) continue;\r
- if( i_ret < 0 )\r
- {\r
- /* Wait a bit */\r
- msleep( INTF_IDLE_SLEEP );\r
- continue;\r
- }\r
-\r
- i_receive_date = mdate();\r
-\r
- i_read = recv( i_socket, p_data, MAX_MSG_LENGTH, 0 );\r
- if( i_read <= 0 )\r
- {\r
- /* Wait a bit */\r
- msleep( INTF_IDLE_SLEEP );\r
- continue;\r
- }\r
-\r
- i_master_date = ntoh64(*(int64_t *)p_data);\r
- i_master_clockref = ntoh64(*(((int64_t *)p_data)+1));\r
-\r
- i_diff_date = i_receive_date -\r
- ((i_receive_date - i_send_date) / 2 + i_master_date);\r
-\r
- i_client_clockref = i_drift = 0;\r
- if( p_intf->p_sys->p_input && i_master_clockref )\r
- {\r
- i_client_clockref = GetClockRef( p_intf, i_clockref );\r
- i_drift = i_client_clockref - i_master_clockref - i_diff_date;\r
-\r
- /* Update our clock to match the master's one */\r
- if( i_client_clockref )\r
- p_intf->p_sys->p_input->i_pts_delay -= i_drift;\r
- }\r
-\r
- msg_Dbg( p_intf, "Slave clockref: "I64Fd" -> "I64Fd" -> "I64Fd", "\r
- "clock diff: "I64Fd" drift: "I64Fd,\r
- i_clockref, i_master_clockref, \r
- i_client_clockref, i_diff_date, i_drift );\r
-\r
- /* Wait a bit */\r
- msleep( INTF_IDLE_SLEEP );\r
- }\r
- }\r
-\r
- if( p_intf->p_sys->p_input ) vlc_object_release( p_intf->p_sys->p_input );\r
- net_Close( i_socket );\r
-}\r
-\r
-static mtime_t GetClockRef( intf_thread_t *p_intf, mtime_t i_pts )\r
-{\r
- input_thread_t *p_input = p_intf->p_sys->p_input;\r
- pgrm_descriptor_t *p_pgrm;\r
-\r
- if( !p_input ) return 0;\r
-\r
- p_pgrm = p_input->stream.p_selected_program;\r
- if( p_pgrm ) return input_ClockGetTS( p_input, p_pgrm, i_pts );\r
-\r
- return 0;\r
-}\r
+/*****************************************************************************
+ * netsync.c: synchronization between several network clients.
+ *****************************************************************************
+ * Copyright (C) 2004-2009 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Gildas Bazin <gbazin@videolan.org>
+ * Jean-Paul Saman <jpsaman@videolan.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <assert.h>
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_interface.h>
+#include <vlc_input.h>
+#include <vlc_playlist.h>
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+#include <sys/types.h>
+#ifdef HAVE_POLL
+# include <poll.h>
+#endif
+
+#include <vlc_network.h>
+
+#define NETSYNC_PORT 9875
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+static int Open (vlc_object_t *);
+static void Close(vlc_object_t *);
+
+#define NETSYNC_TEXT N_("Network master clock")
+#define NETSYNC_LONGTEXT N_("When set then " \
+ "This VLC instance shall dictate its clock for synchronization " \
+ "over clients listening on the masters network ip address")
+
+#define MIP_TEXT N_("Master server ip address")
+#define MIP_LONGTEXT N_("The IP address of " \
+ "The network master clock to use for clock synchronization.")
+
+#define NETSYNC_TIMEOUT_TEXT N_("UDP timeout (in ms)")
+#define NETSYNC_TIMEOUT_LONGTEXT N_("Length of time (in ms) " \
+ "until aborting data reception.")
+
+vlc_module_begin()
+ set_shortname(N_("Network Sync"))
+ set_description(N_("Network synchronization"))
+ set_category(CAT_ADVANCED)
+ set_subcategory(SUBCAT_ADVANCED_MISC)
+
+ add_bool("netsync-master", false, NULL,
+ NETSYNC_TEXT, NETSYNC_LONGTEXT, true)
+ add_string("netsync-master-ip", NULL, NULL, MIP_TEXT, MIP_LONGTEXT,
+ true)
+ add_integer("netsync-timeout", 500, NULL,
+ NETSYNC_TIMEOUT_TEXT, NETSYNC_TIMEOUT_LONGTEXT, true)
+
+ set_capability("interface", 0)
+ set_callbacks(Open, Close)
+vlc_module_end()
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+struct intf_sys_t {
+ int fd;
+ int timeout;
+ bool is_master;
+ playlist_t *playlist;
+
+ /* */
+ input_thread_t *input;
+ vlc_thread_t thread;
+};
+
+static int PlaylistEvent(vlc_object_t *, char const *cmd,
+ vlc_value_t oldval, vlc_value_t newval, void *data);
+
+/*****************************************************************************
+ * Activate: initialize and create stuff
+ *****************************************************************************/
+static int Open(vlc_object_t *object)
+{
+ intf_thread_t *intf = (intf_thread_t*)object;
+ intf_sys_t *sys;
+ int fd;
+
+ if (!var_InheritBool(intf, "netsync-master")) {
+ char *psz_master = var_InheritString(intf, "netsync-master-ip");
+ if (psz_master == NULL) {
+ msg_Err(intf, "master address not specified");
+ return VLC_EGENERIC;
+ }
+ fd = net_ConnectUDP(VLC_OBJECT(intf), psz_master, NETSYNC_PORT, -1);
+ free(psz_master);
+ } else {
+ fd = net_ListenUDP1(VLC_OBJECT(intf), NULL, NETSYNC_PORT);
+ }
+
+ if (fd == -1) {
+ msg_Err(intf, "Netsync socket failure");
+ return VLC_EGENERIC;
+ }
+
+ intf->pf_run = NULL;
+ intf->p_sys = sys = malloc(sizeof(*sys));
+ if (!sys) {
+ net_Close(fd);
+ return VLC_ENOMEM;
+ }
+
+ sys->fd = fd;
+ sys->is_master = var_InheritBool(intf, "netsync-master");
+ sys->timeout = var_InheritInteger(intf, "netsync-timeout");
+ if (sys->timeout < 500)
+ sys->timeout = 500;
+ sys->playlist = pl_Get(intf);
+ sys->input = NULL;
+
+ var_AddCallback(sys->playlist, "input-current", PlaylistEvent, intf);
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Close: destroy interface
+ *****************************************************************************/
+void Close(vlc_object_t *object)
+{
+ intf_thread_t *intf = (intf_thread_t*)object;
+ intf_sys_t *sys = intf->p_sys;
+
+ assert(sys->input == NULL);
+ var_DelCallback(sys->playlist, "input-current", PlaylistEvent, intf);
+ net_Close(sys->fd);
+ free(sys);
+}
+
+static mtime_t GetPcrSystem(input_thread_t *input)
+{
+ int canc = vlc_savecancel();
+ /* TODO use the delay */
+ mtime_t system;
+ if (input_GetPcrSystem(input, &system, NULL))
+ system = -1;
+ vlc_restorecancel(canc);
+
+ return system;
+}
+
+static void *Master(void *handle)
+{
+ intf_thread_t *intf = handle;
+ intf_sys_t *sys = intf->p_sys;
+ for (;;) {
+ struct pollfd ufd = { .fd = sys->fd, .events = POLLIN, };
+ uint64_t data[2];
+
+ if (poll(&ufd, 1, -1) <= 0)
+ continue;
+
+ /* We received something */
+ struct sockaddr_storage from;
+ unsigned struct_size = sizeof(from);
+ recvfrom(sys->fd, data, sizeof(data), 0,
+ (struct sockaddr*)&from, &struct_size);
+
+ mtime_t master_system = GetPcrSystem(sys->input);
+ if (master_system < 0)
+ continue;
+
+ data[0] = hton64(mdate());
+ data[1] = hton64(master_system);
+
+ /* Reply to the sender */
+ sendto(sys->fd, data, sizeof(data), 0,
+ (struct sockaddr *)&from, struct_size);
+#if 0
+ /* not sure we need the client information to sync,
+ since we are the master anyway */
+ mtime_t client_system = ntoh64(data[0]);
+ msg_Dbg(intf, "Master clockref: %"PRId64" -> %"PRId64", from %s "
+ "(date: %"PRId64")", client_system, master_system,
+ (from.ss_family == AF_INET) ? inet_ntoa(((struct sockaddr_in *)&from)->sin_addr)
+ : "non-IPv4", /*date*/ 0);
+#endif
+ }
+}
+
+static void *Slave(void *handle)
+{
+ intf_thread_t *intf = handle;
+ intf_sys_t *sys = intf->p_sys;
+
+ for (;;) {
+ struct pollfd ufd = { .fd = sys->fd, .events = POLLIN, };
+ uint64_t data[2];
+
+ mtime_t system = GetPcrSystem(sys->input);
+ if (system < 0)
+ goto wait;
+
+ /* Send clock request to the master */
+ data[0] = hton64(system);
+
+ const mtime_t send_date = mdate();
+ if (send(sys->fd, data, sizeof(data[0]), 0) <= 0)
+ goto wait;
+
+ /* Don't block */
+ int ret = poll(&ufd, 1, sys->timeout);
+ if (ret == 0)
+ continue;
+ if (ret < 0)
+ goto wait;
+
+ const mtime_t receive_date = mdate();
+ if (recv(sys->fd, data, sizeof(data), 0) <= 0)
+ goto wait;
+
+ const mtime_t master_date = ntoh64(data[0]);
+ const mtime_t master_system = ntoh64(data[1]);
+ const mtime_t diff_date = receive_date -
+ ((receive_date - send_date) / 2 + master_date);
+
+ if (master_system > 0) {
+ int canc = vlc_savecancel();
+
+ mtime_t client_system;
+ if (!input_GetPcrSystem(sys->input, &client_system, NULL)) {
+ const mtime_t diff_system = client_system - master_system - diff_date;
+ if (diff_system != 0) {
+ input_ModifyPcrSystem(sys->input, true, master_system - diff_date);
+#if 0
+ msg_Dbg(intf, "Slave clockref: %"PRId64" -> %"PRId64" -> %"PRId64","
+ " clock diff: %"PRId64", diff: %"PRId64"",
+ system, master_system, client_system,
+ diff_system, diff_date);
+#endif
+ }
+ }
+ vlc_restorecancel(canc);
+ }
+ wait:
+ msleep(INTF_IDLE_SLEEP);
+ }
+}
+
+static int InputEvent(vlc_object_t *object, char const *cmd,
+ vlc_value_t oldval, vlc_value_t newval, void *data)
+{
+ VLC_UNUSED(cmd); VLC_UNUSED(oldval); VLC_UNUSED(object);
+ intf_thread_t *intf = data;
+ intf_sys_t *sys = intf->p_sys;
+
+ if (newval.i_int == INPUT_EVENT_DEAD && sys->input) {
+ msg_Err(intf, "InputEvent DEAD");
+ vlc_cancel(sys->thread);
+ vlc_join(sys->thread, NULL);
+ vlc_object_release(sys->input);
+ sys->input = NULL;
+ }
+ return VLC_SUCCESS;
+}
+
+static int PlaylistEvent(vlc_object_t *object, char const *cmd,
+ vlc_value_t oldval, vlc_value_t newval, void *data)
+{
+ VLC_UNUSED(cmd); VLC_UNUSED(oldval); VLC_UNUSED(object);
+ intf_thread_t *intf = data;
+ intf_sys_t *sys = intf->p_sys;
+
+ input_thread_t *input = newval.p_address;
+ assert(sys->input == NULL);
+ sys->input = vlc_object_hold(input);
+ if (vlc_clone(&sys->thread, sys->is_master ? Master : Slave, intf,
+ VLC_THREAD_PRIORITY_INPUT)) {
+ vlc_object_release(input);
+ return VLC_SUCCESS;
+ }
+ var_AddCallback(input, "intf-event", InputEvent, intf);
+ return VLC_SUCCESS;
+}
+
projects / vlc / blobdiff