4 changed files with 5 additions and 425 deletions
@ -1,420 +0,0 @@ |
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/*****************************************************************************
|
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* udp.c |
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***************************************************************************** |
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* Copyright (C) 2001-2007 VLC authors and VideoLAN |
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* |
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* Authors: Laurent Aimar <fenrir@via.ecp.fr> |
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* Eric Petit <titer@videolan.org> |
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* |
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation; either version 2.1 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this program; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. |
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*****************************************************************************/ |
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|
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/*****************************************************************************
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* Preamble |
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*****************************************************************************/ |
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#ifdef HAVE_CONFIG_H |
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# include "config.h" |
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#endif |
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|
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#include <vlc_common.h> |
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#include <vlc_plugin.h> |
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|
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#include <sys/types.h> |
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#include <unistd.h> |
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#include <assert.h> |
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#include <errno.h> |
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|
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#include <vlc_queue.h> |
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#include <vlc_sout.h> |
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#include <vlc_block.h> |
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#ifdef _WIN32 |
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# include <winsock2.h> |
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# include <ws2tcpip.h> |
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#elif defined (HAVE_SYS_SOCKET_H) |
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# include <sys/socket.h> |
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#endif |
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|
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#include <vlc_network.h> |
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|
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#define MAX_EMPTY_BLOCKS 200 |
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/*****************************************************************************
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* Module descriptor |
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*****************************************************************************/ |
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static int Open ( vlc_object_t * ); |
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static void Close( vlc_object_t * ); |
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|
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#define SOUT_CFG_PREFIX "sout-udp-" |
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|
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#define CACHING_TEXT N_("Caching value (ms)") |
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#define CACHING_LONGTEXT N_( \ |
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"Default caching value for outbound UDP streams. This " \ |
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"value should be set in milliseconds." ) |
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|
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#define GROUP_TEXT N_("Group packets") |
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#define GROUP_LONGTEXT N_("Packets can be sent one by one at the right time " \ |
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"or by groups. You can choose the number " \ |
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"of packets that will be sent at a time. It " \ |
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"helps reducing the scheduling load on " \ |
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"heavily-loaded systems." ) |
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|
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vlc_module_begin () |
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set_description( N_("UDP stream output") ) |
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set_shortname( "UDP" ) |
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set_category( CAT_SOUT ) |
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set_subcategory( SUBCAT_SOUT_ACO ) |
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add_integer( SOUT_CFG_PREFIX "caching", DEFAULT_PTS_DELAY / 1000, CACHING_TEXT, CACHING_LONGTEXT ) |
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add_integer( SOUT_CFG_PREFIX "group", 1, GROUP_TEXT, GROUP_LONGTEXT ) |
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|
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set_capability( "sout access", 0 ) |
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add_shortcut( "udp" ) |
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set_callbacks( Open, Close ) |
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vlc_module_end () |
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/*****************************************************************************
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* Exported prototypes |
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*****************************************************************************/ |
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static const char *const ppsz_sout_options[] = { |
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"caching", |
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"group", |
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NULL |
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}; |
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|
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/* Options handled by the libvlc network core */ |
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static const char *const ppsz_core_options[] = { |
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"dscp", |
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"ttl", |
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"miface", |
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NULL |
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}; |
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static ssize_t Write ( sout_access_out_t *, block_t * ); |
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static int Control( sout_access_out_t *, int, va_list ); |
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|
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static void* ThreadWrite( void * ); |
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typedef struct |
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{ |
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vlc_tick_t i_caching; |
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int i_handle; |
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bool b_mtu_warning; |
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bool dead; |
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size_t i_mtu; |
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|
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vlc_queue_t queue; |
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block_t *p_buffer; |
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|
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vlc_thread_t thread; |
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} sout_access_out_sys_t; |
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#define DEFAULT_PORT 1234 |
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/*****************************************************************************
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* Open: open the file |
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*****************************************************************************/ |
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static int Open( vlc_object_t *p_this ) |
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{ |
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sout_access_out_t *p_access = (sout_access_out_t*)p_this; |
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sout_access_out_sys_t *p_sys; |
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char *psz_dst_addr = NULL; |
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int i_dst_port; |
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int i_handle; |
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config_ChainParse( p_access, SOUT_CFG_PREFIX, |
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ppsz_sout_options, p_access->p_cfg ); |
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config_ChainParse( p_access, "", |
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ppsz_core_options, p_access->p_cfg ); |
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if (var_Create (p_access, "dst-port", VLC_VAR_INTEGER) |
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|| var_Create (p_access, "src-port", VLC_VAR_INTEGER) |
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|| var_Create (p_access, "dst-addr", VLC_VAR_STRING) |
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|| var_Create (p_access, "src-addr", VLC_VAR_STRING)) |
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{ |
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return VLC_ENOMEM; |
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} |
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if( !( p_sys = malloc ( sizeof( *p_sys ) ) ) ) |
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return VLC_ENOMEM; |
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p_access->p_sys = p_sys; |
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i_dst_port = DEFAULT_PORT; |
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char *psz_parser = psz_dst_addr = strdup( p_access->psz_path ); |
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if( !psz_dst_addr ) |
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{ |
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free( p_sys ); |
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return VLC_ENOMEM; |
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} |
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if (psz_parser[0] == '[') |
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psz_parser = strchr (psz_parser, ']'); |
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psz_parser = strchr (psz_parser ? psz_parser : psz_dst_addr, ':'); |
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if (psz_parser != NULL) |
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{ |
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*psz_parser++ = '\0'; |
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i_dst_port = atoi (psz_parser); |
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} |
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i_handle = net_ConnectDgram( p_this, psz_dst_addr, i_dst_port, -1, |
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IPPROTO_UDP ); |
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free (psz_dst_addr); |
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if( i_handle == -1 ) |
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{ |
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msg_Err( p_access, "failed to create raw UDP socket" ); |
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free (p_sys); |
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return VLC_EGENERIC; |
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} |
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else |
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{ |
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char addr[NI_MAXNUMERICHOST]; |
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int port; |
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if (net_GetSockAddress (i_handle, addr, &port) == 0) |
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{ |
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msg_Dbg (p_access, "source: %s port %d", addr, port); |
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var_SetString (p_access, "src-addr", addr); |
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var_SetInteger (p_access, "src-port", port); |
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} |
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if (net_GetPeerAddress (i_handle, addr, &port) == 0) |
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{ |
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msg_Dbg (p_access, "destination: %s port %d", addr, port); |
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var_SetString (p_access, "dst-addr", addr); |
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var_SetInteger (p_access, "dst-port", port); |
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} |
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} |
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shutdown( i_handle, SHUT_RD ); |
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p_sys->i_caching = VLC_TICK_FROM_MS( |
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var_GetInteger( p_access, SOUT_CFG_PREFIX "caching") ); |
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p_sys->i_handle = i_handle; |
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p_sys->i_mtu = var_CreateGetInteger( p_this, "mtu" ); |
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p_sys->b_mtu_warning = false; |
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p_sys->dead = false; |
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vlc_queue_Init(&p_sys->queue, offsetof (block_t, p_next)); |
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p_sys->p_buffer = NULL; |
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if( vlc_clone( &p_sys->thread, ThreadWrite, p_access, |
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VLC_THREAD_PRIORITY_HIGHEST ) ) |
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{ |
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msg_Err( p_access, "cannot spawn sout access thread" ); |
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net_Close (i_handle); |
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free (p_sys); |
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return VLC_EGENERIC; |
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} |
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p_access->pf_write = Write; |
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p_access->pf_control = Control; |
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return VLC_SUCCESS; |
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} |
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|
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/*****************************************************************************
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* Close: close the target |
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*****************************************************************************/ |
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static void Close( vlc_object_t * p_this ) |
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{ |
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sout_access_out_t *p_access = (sout_access_out_t*)p_this; |
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sout_access_out_sys_t *p_sys = p_access->p_sys; |
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vlc_queue_Kill(&p_sys->queue, &p_sys->dead); |
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vlc_join( p_sys->thread, NULL ); |
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if( p_sys->p_buffer ) block_Release( p_sys->p_buffer ); |
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net_Close( p_sys->i_handle ); |
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free( p_sys ); |
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} |
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static int Control( sout_access_out_t *p_access, int i_query, va_list args ) |
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{ |
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(void)p_access; |
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switch( i_query ) |
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{ |
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case ACCESS_OUT_CONTROLS_PACE: |
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*va_arg( args, bool * ) = false; |
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break; |
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default: |
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return VLC_EGENERIC; |
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} |
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return VLC_SUCCESS; |
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} |
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|
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/*****************************************************************************
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* Write: standard write on a file descriptor. |
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*****************************************************************************/ |
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static ssize_t Write( sout_access_out_t *p_access, block_t *p_buffer ) |
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{ |
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sout_access_out_sys_t *p_sys = p_access->p_sys; |
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int i_len = 0; |
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while( p_buffer ) |
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{ |
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block_t *p_next; |
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int i_packets = 0; |
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vlc_tick_t now = vlc_tick_now(); |
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if( !p_sys->b_mtu_warning && p_buffer->i_buffer > p_sys->i_mtu ) |
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{ |
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msg_Warn( p_access, "packet size > MTU, you should probably " |
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"increase the MTU" ); |
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p_sys->b_mtu_warning = true; |
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} |
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|
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/* Check if there is enough space in the buffer */ |
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if( p_sys->p_buffer && |
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p_sys->p_buffer->i_buffer + p_buffer->i_buffer > p_sys->i_mtu ) |
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{ |
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if( p_sys->p_buffer->i_dts + p_sys->i_caching < now ) |
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{ |
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msg_Dbg( p_access, "late packet for UDP input (%"PRId64 ")", |
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now - p_sys->p_buffer->i_dts |
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- p_sys->i_caching ); |
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} |
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vlc_queue_Enqueue(&p_sys->queue, p_sys->p_buffer); |
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p_sys->p_buffer = NULL; |
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} |
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i_len += p_buffer->i_buffer; |
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while( p_buffer->i_buffer ) |
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{ |
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size_t i_payload_size = p_sys->i_mtu; |
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size_t i_write = __MIN( p_buffer->i_buffer, i_payload_size ); |
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i_packets++; |
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if( !p_sys->p_buffer ) |
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{ |
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p_sys->p_buffer = block_Alloc( p_sys->i_mtu ); |
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if( !p_sys->p_buffer ) break; |
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p_sys->p_buffer->i_dts = p_buffer->i_dts; |
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p_sys->p_buffer->i_buffer = 0; |
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} |
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memcpy( p_sys->p_buffer->p_buffer + p_sys->p_buffer->i_buffer, |
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p_buffer->p_buffer, i_write ); |
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p_sys->p_buffer->i_buffer += i_write; |
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p_buffer->p_buffer += i_write; |
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p_buffer->i_buffer -= i_write; |
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if ( p_buffer->i_flags & BLOCK_FLAG_CLOCK ) |
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{ |
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if ( p_sys->p_buffer->i_flags & BLOCK_FLAG_CLOCK ) |
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msg_Warn( p_access, "putting two PCRs at once" ); |
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p_sys->p_buffer->i_flags |= BLOCK_FLAG_CLOCK; |
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} |
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if( p_sys->p_buffer->i_buffer == p_sys->i_mtu || i_packets > 1 ) |
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{ |
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/* Flush */ |
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if( p_sys->p_buffer->i_dts + p_sys->i_caching < now ) |
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{ |
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msg_Dbg( p_access, "late packet for udp input (%"PRId64 ")", |
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vlc_tick_now() - p_sys->p_buffer->i_dts |
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- p_sys->i_caching ); |
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} |
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vlc_queue_Enqueue(&p_sys->queue, p_sys->p_buffer); |
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p_sys->p_buffer = NULL; |
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} |
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} |
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p_next = p_buffer->p_next; |
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block_Release( p_buffer ); |
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p_buffer = p_next; |
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} |
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return i_len; |
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} |
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|
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/*****************************************************************************
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* ThreadWrite: Write a packet on the network at the good time. |
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*****************************************************************************/ |
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static void* ThreadWrite( void *data ) |
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{ |
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sout_access_out_t *p_access = data; |
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sout_access_out_sys_t *p_sys = p_access->p_sys; |
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vlc_tick_t i_date_last = -1; |
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const unsigned i_group = var_GetInteger( p_access, |
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SOUT_CFG_PREFIX "group" ); |
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int i_to_send = i_group; |
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unsigned i_dropped_packets = 0; |
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block_t *p_pk; |
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while ((p_pk = vlc_queue_DequeueKillable(&p_sys->queue, |
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&p_sys->dead)) != NULL) |
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{ |
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vlc_tick_t i_date; |
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i_date = p_sys->i_caching + p_pk->i_dts; |
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if( i_date_last > 0 ) |
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{ |
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if( i_date - i_date_last > VLC_TICK_FROM_SEC(2) ) |
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{ |
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if( !i_dropped_packets ) |
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msg_Dbg( p_access, "mmh, hole (%"PRId64" > 2s) -> drop", |
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i_date - i_date_last ); |
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block_Release( p_pk ); |
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i_date_last = i_date; |
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i_dropped_packets++; |
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continue; |
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} |
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else if( i_date - i_date_last < VLC_TICK_FROM_MS(-1) ) |
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{ |
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if( !i_dropped_packets ) |
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msg_Dbg( p_access, "mmh, packets in the past (%"PRId64")", |
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i_date_last - i_date ); |
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} |
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} |
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i_to_send--; |
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if( !i_to_send || (p_pk->i_flags & BLOCK_FLAG_CLOCK) ) |
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{ |
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vlc_tick_wait( i_date ); |
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i_to_send = i_group; |
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} |
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if ( send( p_sys->i_handle, p_pk->p_buffer, p_pk->i_buffer, 0 ) == -1 ) |
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msg_Warn( p_access, "send error: %s", vlc_strerror_c(errno) ); |
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|
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if( i_dropped_packets ) |
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{ |
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msg_Dbg( p_access, "dropped %i packets", i_dropped_packets ); |
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i_dropped_packets = 0; |
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} |
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i_date_last = i_date; |
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#if 1 |
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i_date = vlc_tick_now() - i_date; |
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if ( i_date > VLC_TICK_FROM_MS(20) ) |
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{ |
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msg_Dbg( p_access, "packet has been sent too late (%"PRId64 ")", |
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i_date ); |
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} |
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#endif |
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block_Release( p_pk ); |
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|
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} |
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return NULL; |
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} |
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