1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2001-2007 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Eric Petit <titer@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
35 #include <sys/types.h>
42 #include <vlc_block.h>
49 # include <winsock2.h>
50 # include <ws2tcpip.h>
52 # include <sys/socket.h>
55 #include <vlc_network.h>
57 #define MAX_EMPTY_BLOCKS 200
59 /*****************************************************************************
61 *****************************************************************************/
62 static int Open ( vlc_object_t * );
63 static void Close( vlc_object_t * );
65 #define SOUT_CFG_PREFIX "sout-udp-"
67 #define CACHING_TEXT N_("Caching value (ms)")
68 #define CACHING_LONGTEXT N_( \
69 "Default caching value for outbound UDP streams. This " \
70 "value should be set in milliseconds." )
72 #define GROUP_TEXT N_("Group packets")
73 #define GROUP_LONGTEXT N_("Packets can be sent one by one at the right time " \
74 "or by groups. You can choose the number " \
75 "of packets that will be sent at a time. It " \
76 "helps reducing the scheduling load on " \
77 "heavily-loaded systems." )
80 set_description( N_("UDP stream output") )
81 set_shortname( "UDP" )
82 set_category( CAT_SOUT )
83 set_subcategory( SUBCAT_SOUT_ACO )
84 add_integer( SOUT_CFG_PREFIX "caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT, true )
85 add_integer( SOUT_CFG_PREFIX "group", 1, NULL, GROUP_TEXT, GROUP_LONGTEXT,
87 add_obsolete_integer( SOUT_CFG_PREFIX "late" )
88 add_obsolete_bool( SOUT_CFG_PREFIX "raw" )
90 set_capability( "sout access", 100 )
92 set_callbacks( Open, Close )
95 /*****************************************************************************
97 *****************************************************************************/
99 static const char *const ppsz_sout_options[] = {
105 /* Options handled by the libvlc network core */
106 static const char *const ppsz_core_options[] = {
114 static ssize_t Write ( sout_access_out_t *, block_t * );
115 static int Seek ( sout_access_out_t *, off_t );
116 static int Control( sout_access_out_t *, int, va_list );
118 static void* ThreadWrite( vlc_object_t * );
119 static block_t *NewUDPPacket( sout_access_out_t *, mtime_t );
121 typedef struct sout_access_thread_t
125 block_fifo_t *p_fifo;
132 block_fifo_t *p_empty_blocks;
133 } sout_access_thread_t;
135 struct sout_access_out_sys_t
142 sout_access_thread_t *p_thread;
146 #define DEFAULT_PORT 1234
148 /*****************************************************************************
149 * Open: open the file
150 *****************************************************************************/
151 static int Open( vlc_object_t *p_this )
153 sout_access_out_t *p_access = (sout_access_out_t*)p_this;
154 sout_access_out_sys_t *p_sys;
156 char *psz_dst_addr = NULL;
161 config_ChainParse( p_access, SOUT_CFG_PREFIX,
162 ppsz_sout_options, p_access->p_cfg );
163 config_ChainParse( p_access, "",
164 ppsz_core_options, p_access->p_cfg );
166 if (var_Create (p_access, "dst-port", VLC_VAR_INTEGER)
167 || var_Create (p_access, "src-port", VLC_VAR_INTEGER)
168 || var_Create (p_access, "dst-addr", VLC_VAR_STRING)
169 || var_Create (p_access, "src-addr", VLC_VAR_STRING))
174 if( !( p_sys = calloc ( 1, sizeof( sout_access_out_sys_t ) ) ) )
176 p_access->p_sys = p_sys;
178 i_dst_port = DEFAULT_PORT;
179 char *psz_parser = psz_dst_addr = strdup( p_access->psz_path );
186 if (psz_parser[0] == '[')
187 psz_parser = strchr (psz_parser, ']');
189 psz_parser = strchr (psz_parser ?: psz_dst_addr, ':');
190 if (psz_parser != NULL)
192 *psz_parser++ = '\0';
193 i_dst_port = atoi (psz_parser);
197 vlc_object_create( p_access, sizeof( sout_access_thread_t ) );
198 if( !p_sys->p_thread )
205 vlc_object_attach( p_sys->p_thread, p_access );
206 p_sys->p_thread->b_die = 0;
207 p_sys->p_thread->b_error= 0;
208 p_sys->p_thread->p_fifo = block_FifoNew();
209 p_sys->p_thread->p_empty_blocks = block_FifoNew();
211 i_handle = net_ConnectDgram( p_this, psz_dst_addr, i_dst_port, -1,
217 msg_Err( p_access, "failed to create raw UDP socket" );
218 vlc_object_release (p_sys->p_thread);
224 char addr[NI_MAXNUMERICHOST];
227 if (net_GetSockAddress (i_handle, addr, &port) == 0)
229 msg_Dbg (p_access, "source: %s port %d", addr, port);
230 var_SetString (p_access, "src-addr", addr);
231 var_SetInteger (p_access, "src-port", port);
234 if (net_GetPeerAddress (i_handle, addr, &port) == 0)
236 msg_Dbg (p_access, "destination: %s port %d", addr, port);
237 var_SetString (p_access, "dst-addr", addr);
238 var_SetInteger (p_access, "dst-port", port);
241 p_sys->p_thread->i_handle = i_handle;
242 shutdown( i_handle, SHUT_RD );
244 p_sys->p_thread->i_caching =
245 (int64_t)1000 * var_GetInteger( p_access, SOUT_CFG_PREFIX "caching");
246 p_sys->p_thread->i_group =
247 var_GetInteger( p_access, SOUT_CFG_PREFIX "group" );
249 p_sys->i_mtu = var_CreateGetInteger( p_this, "mtu" );
250 p_sys->p_buffer = NULL;
252 if( vlc_thread_create( p_sys->p_thread, "sout write thread", ThreadWrite,
253 VLC_THREAD_PRIORITY_HIGHEST, false ) )
255 msg_Err( p_access, "cannot spawn sout access thread" );
256 net_Close (i_handle);
257 vlc_object_release( p_sys->p_thread );
262 p_access->pf_write = Write;
263 p_access->pf_seek = Seek;
264 p_access->pf_control = Control;
269 /*****************************************************************************
270 * Close: close the target
271 *****************************************************************************/
272 static void Close( vlc_object_t * p_this )
274 sout_access_out_t *p_access = (sout_access_out_t*)p_this;
275 sout_access_out_sys_t *p_sys = p_access->p_sys;
278 vlc_object_kill( p_sys->p_thread );
280 for( i = 0; i < 10; i++ )
282 block_t *p_dummy = block_New( p_access, p_sys->i_mtu );
285 p_dummy->i_length = 0;
286 memset( p_dummy->p_buffer, 0, p_dummy->i_buffer );
287 block_FifoPut( p_sys->p_thread->p_fifo, p_dummy );
289 vlc_thread_join( p_sys->p_thread );
291 block_FifoRelease( p_sys->p_thread->p_fifo );
292 block_FifoRelease( p_sys->p_thread->p_empty_blocks );
294 if( p_sys->p_buffer ) block_Release( p_sys->p_buffer );
296 net_Close( p_sys->p_thread->i_handle );
298 vlc_object_detach( p_sys->p_thread );
299 vlc_object_release( p_sys->p_thread );
301 msg_Dbg( p_access, "UDP access output closed" );
305 static int Control( sout_access_out_t *p_access, int i_query, va_list args )
311 case ACCESS_OUT_CONTROLS_PACE:
312 *va_arg( args, bool * ) = false;
321 /*****************************************************************************
322 * Write: standard write on a file descriptor.
323 *****************************************************************************/
324 static ssize_t Write( sout_access_out_t *p_access, block_t *p_buffer )
326 sout_access_out_sys_t *p_sys = p_access->p_sys;
333 mtime_t now = mdate();
335 if( !p_sys->b_mtu_warning && p_buffer->i_buffer > p_sys->i_mtu )
337 msg_Warn( p_access, "packet size > MTU, you should probably "
338 "increase the MTU" );
339 p_sys->b_mtu_warning = true;
342 /* Check if there is enough space in the buffer */
343 if( p_sys->p_buffer &&
344 p_sys->p_buffer->i_buffer + p_buffer->i_buffer > p_sys->i_mtu )
346 if( p_sys->p_buffer->i_dts + p_sys->p_thread->i_caching < now )
348 msg_Dbg( p_access, "late packet for UDP input (%"PRId64 ")",
349 now - p_sys->p_buffer->i_dts
350 - p_sys->p_thread->i_caching );
352 block_FifoPut( p_sys->p_thread->p_fifo, p_sys->p_buffer );
353 p_sys->p_buffer = NULL;
356 i_len += p_buffer->i_buffer;
357 while( p_buffer->i_buffer )
359 int i_payload_size = p_sys->i_mtu;
361 int i_write = __MIN( p_buffer->i_buffer, i_payload_size );
365 if( !p_sys->p_buffer )
367 p_sys->p_buffer = NewUDPPacket( p_access, p_buffer->i_dts );
368 if( !p_sys->p_buffer ) break;
371 memcpy( p_sys->p_buffer->p_buffer + p_sys->p_buffer->i_buffer,
372 p_buffer->p_buffer, i_write );
374 p_sys->p_buffer->i_buffer += i_write;
375 p_buffer->p_buffer += i_write;
376 p_buffer->i_buffer -= i_write;
377 if ( p_buffer->i_flags & BLOCK_FLAG_CLOCK )
379 if ( p_sys->p_buffer->i_flags & BLOCK_FLAG_CLOCK )
380 msg_Warn( p_access, "putting two PCRs at once" );
381 p_sys->p_buffer->i_flags |= BLOCK_FLAG_CLOCK;
384 if( p_sys->p_buffer->i_buffer == p_sys->i_mtu || i_packets > 1 )
387 if( p_sys->p_buffer->i_dts + p_sys->p_thread->i_caching < now )
389 msg_Dbg( p_access, "late packet for udp input (%"PRId64 ")",
390 mdate() - p_sys->p_buffer->i_dts
391 - p_sys->p_thread->i_caching );
393 block_FifoPut( p_sys->p_thread->p_fifo, p_sys->p_buffer );
394 p_sys->p_buffer = NULL;
398 p_next = p_buffer->p_next;
399 block_Release( p_buffer );
403 return( p_sys->p_thread->b_error ? -1 : i_len );
406 /*****************************************************************************
407 * Seek: seek to a specific location in a file
408 *****************************************************************************/
409 static int Seek( sout_access_out_t *p_access, off_t i_pos )
411 msg_Err( p_access, "UDP sout access cannot seek" );
415 /*****************************************************************************
416 * NewUDPPacket: allocate a new UDP packet of size p_sys->i_mtu
417 *****************************************************************************/
418 static block_t *NewUDPPacket( sout_access_out_t *p_access, mtime_t i_dts)
420 sout_access_out_sys_t *p_sys = p_access->p_sys;
423 while ( block_FifoCount( p_sys->p_thread->p_empty_blocks ) > MAX_EMPTY_BLOCKS )
425 p_buffer = block_FifoGet( p_sys->p_thread->p_empty_blocks );
426 block_Release( p_buffer );
429 if( block_FifoCount( p_sys->p_thread->p_empty_blocks ) == 0 )
431 p_buffer = block_Alloc( p_sys->i_mtu );
435 p_buffer = block_FifoGet(p_sys->p_thread->p_empty_blocks );
436 p_buffer->i_flags = 0;
437 p_buffer = block_Realloc( p_buffer, 0, p_sys->i_mtu );
440 p_buffer->i_dts = i_dts;
441 p_buffer->i_buffer = 0;
446 /*****************************************************************************
447 * ThreadWrite: Write a packet on the network at the good time.
448 *****************************************************************************/
449 static void* ThreadWrite( vlc_object_t *p_this )
451 sout_access_thread_t *p_thread = (sout_access_thread_t*)p_this;
452 mtime_t i_date_last = -1;
453 mtime_t i_to_send = p_thread->i_group;
454 int i_dropped_packets = 0;
459 mtime_t i_date, i_sent;
461 if( (i++ % 1000)==0 ) {
464 block_t *p_tmp = p_thread->p_empty_blocks->p_first;
465 while( p_tmp ) { p_tmp = p_tmp->p_next; i++;}
466 p_tmp = p_thread->p_fifo->p_first;
467 while( p_tmp ) { p_tmp = p_tmp->p_next; j++;}
468 msg_Dbg( p_thread, "fifo depth: %d/%d, empty blocks: %d/%d",
469 p_thread->p_fifo->i_depth, j,p_thread->p_empty_blocks->i_depth,i );
472 p_pk = block_FifoGet( p_thread->p_fifo );
474 i_date = p_thread->i_caching + p_pk->i_dts;
475 if( i_date_last > 0 )
477 if( i_date - i_date_last > 2000000 )
479 if( !i_dropped_packets )
480 msg_Dbg( p_thread, "mmh, hole (%"PRId64" > 2s) -> drop",
481 i_date - i_date_last );
483 block_FifoPut( p_thread->p_empty_blocks, p_pk );
485 i_date_last = i_date;
489 else if( i_date - i_date_last < -1000 )
491 if( !i_dropped_packets )
492 msg_Dbg( p_thread, "mmh, packets in the past (%"PRId64")",
493 i_date_last - i_date );
497 block_cleanup_push( p_pk );
499 if( !i_to_send || (p_pk->i_flags & BLOCK_FLAG_CLOCK) )
502 i_to_send = p_thread->i_group;
504 if ( send( p_thread->i_handle, p_pk->p_buffer,
505 p_pk->i_buffer, 0 ) == -1 )
506 msg_Warn( p_thread, "send error: %m" );
509 if( i_dropped_packets )
511 msg_Dbg( p_thread, "dropped %i packets", i_dropped_packets );
512 i_dropped_packets = 0;
517 if ( i_sent > i_date + 20000 )
519 msg_Dbg( p_thread, "packet has been sent too late (%"PRId64 ")",
524 block_FifoPut( p_thread->p_empty_blocks, p_pk );
526 i_date_last = i_date;