1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2001, 2002 VideoLAN
5 * $Id: udp.c,v 1.17 2004/01/23 17:56:14 gbazin Exp $
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
29 #include <sys/types.h>
36 #include <vlc/input.h>
44 # include <winsock2.h>
45 # include <ws2tcpip.h>
47 # define IN_MULTICAST(a) IN_CLASSD(a)
50 # include <sys/socket.h>
55 #define DEFAULT_PORT 1234
56 /*****************************************************************************
58 *****************************************************************************/
59 static int Open ( vlc_object_t * );
60 static void Close ( vlc_object_t * );
62 static int Write ( sout_access_out_t *, sout_buffer_t * );
63 static int WriteRaw( sout_access_out_t *, sout_buffer_t * );
64 static int Seek ( sout_access_out_t *, off_t );
66 static void ThreadWrite( vlc_object_t * );
68 static sout_buffer_t *NewUDPPacket( sout_access_out_t *, mtime_t );
70 /*****************************************************************************
72 *****************************************************************************/
73 #define CACHING_TEXT N_("caching value in ms")
74 #define CACHING_LONGTEXT N_( \
75 "Allows you to modify the default caching value for udp streams. This " \
76 "value should be set in miliseconds units." )
79 set_description( _("UDP stream ouput") );
80 add_category_hint( N_("udp stream output"), NULL , VLC_TRUE );
81 add_integer( "udp-sout-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
82 set_capability( "sout access", 100 );
83 add_shortcut( "udp" );
84 add_shortcut( "rtp" ); // Will work only with ts muxer
85 set_callbacks( Open, Close );
88 typedef struct sout_access_thread_s
92 sout_instance_t *p_sout;
100 } sout_access_thread_t;
102 struct sout_access_out_sys_t
104 int b_rtpts; // 1 if add rtp/ts header
105 uint16_t i_sequence_number;
110 sout_buffer_t *p_buffer;
112 sout_access_thread_t *p_thread;
116 /*****************************************************************************
117 * Open: open the file
118 *****************************************************************************/
119 static int Open( vlc_object_t *p_this )
121 sout_access_out_t *p_access = (sout_access_out_t*)p_this;
122 sout_access_out_sys_t *p_sys;
129 network_socket_t socket_desc;
134 if( !( p_sys = p_access->p_sys =
135 malloc( sizeof( sout_access_out_sys_t ) ) ) )
137 msg_Err( p_access, "Not enough memory" );
142 if( p_access->psz_access != NULL &&
143 !strcmp( p_access->psz_access, "rtp" ) )
145 msg_Warn( p_access, "becarefull that rtp ouput work only with ts "
146 "payload(not an error)" );
154 psz_parser = strdup( p_access->psz_name );
156 psz_dst_addr = psz_parser;
159 if ( *psz_parser == '[' )
161 while( *psz_parser && *psz_parser != ']' )
166 while( *psz_parser && *psz_parser != ':' )
170 if( *psz_parser == ':' )
174 i_dst_port = atoi( psz_parser );
176 if( i_dst_port <= 0 )
178 i_dst_port = DEFAULT_PORT;
182 vlc_object_create( p_access, sizeof( sout_access_thread_t ) );
183 if( !p_sys->p_thread )
185 msg_Err( p_access, "out of memory" );
189 p_sys->p_thread->p_sout = p_access->p_sout;
190 p_sys->p_thread->b_die = 0;
191 p_sys->p_thread->b_error= 0;
192 p_sys->p_thread->p_fifo = sout_FifoCreate( p_access->p_sout );
194 socket_desc.i_type = NETWORK_UDP;
195 socket_desc.psz_server_addr = psz_dst_addr;
196 socket_desc.i_server_port = i_dst_port;
197 socket_desc.psz_bind_addr = "";
198 socket_desc.i_bind_port = 0;
199 socket_desc.i_ttl = 0;
200 if( ( psz_val = sout_cfg_find_value( p_access->p_cfg, "ttl" ) ) )
202 socket_desc.i_ttl = atoi( psz_val );
204 p_sys->p_thread->p_private = (void*)&socket_desc;
205 if( !( p_network = module_Need( p_sys->p_thread, "network", "" ) ) )
207 msg_Err( p_access, "failed to open a connection (udp)" );
210 module_Unneed( p_sys->p_thread, p_network );
212 p_sys->p_thread->i_handle = socket_desc.i_handle;
214 var_Create( p_this, "udp-sout-caching",
215 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
216 var_Get( p_this, "udp-sout-caching", &val );
217 p_sys->p_thread->i_caching = val.i_int * 1000;
218 if( ( psz_val = sout_cfg_find_value( p_access->p_cfg, "caching" ) ) )
220 p_sys->p_thread->i_caching = atoll( psz_val ) * 1000;
223 p_sys->i_mtu = socket_desc.i_mtu;
225 if( vlc_thread_create( p_sys->p_thread, "sout write thread", ThreadWrite,
226 VLC_THREAD_PRIORITY_OUTPUT, VLC_FALSE ) )
228 msg_Err( p_access->p_sout, "cannot spawn sout access thread" );
229 vlc_object_destroy( p_sys->p_thread );
233 srand( (uint32_t)mdate());
234 p_sys->p_buffer = NULL;
235 p_sys->i_sequence_number = rand()&0xffff;
236 p_sys->i_ssrc = rand()&0xffffffff;
238 if( sout_cfg_find( p_access->p_cfg, "raw" ) )
240 p_access->pf_write = WriteRaw;
244 p_access->pf_write = Write;
247 p_access->pf_seek = Seek;
249 msg_Info( p_access, "Open: addr:`%s' port:`%d'", psz_dst_addr, i_dst_port);
251 free( psz_dst_addr );
255 /*****************************************************************************
256 * Close: close the target
257 *****************************************************************************/
258 static void Close( vlc_object_t * p_this )
260 sout_access_out_t *p_access = (sout_access_out_t*)p_this;
261 sout_access_out_sys_t *p_sys = p_access->p_sys;
264 p_sys->p_thread->b_die = 1;
265 for( i = 0; i < 10; i++ )
267 sout_buffer_t *p_dummy;
269 p_dummy = sout_BufferNew( p_access->p_sout, p_sys->i_mtu );
272 p_dummy->i_length = 0;
273 sout_FifoPut( p_sys->p_thread->p_fifo, p_dummy );
275 vlc_thread_join( p_sys->p_thread );
277 sout_FifoDestroy( p_access->p_sout, p_sys->p_thread->p_fifo );
279 if( p_sys->p_buffer )
281 sout_BufferDelete( p_access->p_sout, p_sys->p_buffer );
284 #if defined( UNDER_CE )
285 CloseHandle( (HANDLE)p_sys->p_thread->i_handle );
286 #elif defined( WIN32 )
287 closesocket( p_sys->p_thread->i_handle );
289 close( p_sys->p_thread->i_handle );
293 msg_Info( p_access, "Close" );
296 /*****************************************************************************
297 * Write: standard write on a file descriptor.
298 *****************************************************************************/
299 static int Write( sout_access_out_t *p_access, sout_buffer_t *p_buffer )
301 sout_access_out_sys_t *p_sys = p_access->p_sys;
302 unsigned int i_write;
306 sout_buffer_t *p_next;
307 if( p_buffer->i_size > p_sys->i_mtu )
309 msg_Warn( p_access, "arggggggggggggg packet size > mtu" );
310 i_write = p_sys->i_mtu;
314 i_write = p_buffer->i_size;
317 /* if we have enough data, enque the buffer */
318 if( p_sys->p_buffer &&
319 p_sys->p_buffer->i_size + i_write > p_sys->i_mtu )
321 sout_FifoPut( p_sys->p_thread->p_fifo, p_sys->p_buffer );
322 p_sys->p_buffer = NULL;
325 if( !p_sys->p_buffer )
327 p_sys->p_buffer = NewUDPPacket( p_access, p_buffer->i_dts );
330 if( p_buffer->i_size > 0 )
332 memcpy( p_sys->p_buffer->p_buffer + p_sys->p_buffer->i_size,
333 p_buffer->p_buffer, i_write );
334 p_sys->p_buffer->i_size += i_write;
336 p_next = p_buffer->p_next;
337 sout_BufferDelete( p_access->p_sout, p_buffer );
341 return( p_sys->p_thread->b_error ? -1 : 0 );
344 /*****************************************************************************
345 * WriteRaw: write p_buffer without trying to fill mtu
346 *****************************************************************************/
347 static int WriteRaw( sout_access_out_t *p_access, sout_buffer_t *p_buffer )
349 sout_access_out_sys_t *p_sys = p_access->p_sys;
351 sout_FifoPut( p_sys->p_thread->p_fifo, p_buffer );
353 return( p_sys->p_thread->b_error ? -1 : 0 );
356 /*****************************************************************************
357 * Seek: seek to a specific location in a file
358 *****************************************************************************/
359 static int Seek( sout_access_out_t *p_access, off_t i_pos )
361 msg_Err( p_access, "udp sout access cannot seek" );
365 /*****************************************************************************
366 * NewUDPPacket: allocate a new UDP packet of size p_sys->i_mtu
367 *****************************************************************************/
368 static sout_buffer_t *NewUDPPacket( sout_access_out_t *p_access, mtime_t i_dts)
370 sout_access_out_sys_t *p_sys = p_access->p_sys;
371 sout_buffer_t *p_buffer;
373 p_buffer = sout_BufferNew( p_access->p_sout, p_sys->i_mtu );
374 p_buffer->i_dts = i_dts;
375 p_buffer->i_size = 0;
379 mtime_t i_timestamp = p_buffer->i_dts * 9 / 100;
381 /* add rtp/ts header */
382 p_buffer->p_buffer[0] = 0x80;
383 p_buffer->p_buffer[1] = 0x21; // mpeg2-ts
385 p_buffer->p_buffer[2] = ( p_sys->i_sequence_number >> 8 )&0xff;
386 p_buffer->p_buffer[3] = p_sys->i_sequence_number&0xff;
387 p_sys->i_sequence_number++;
389 p_buffer->p_buffer[4] = ( i_timestamp >> 24 )&0xff;
390 p_buffer->p_buffer[5] = ( i_timestamp >> 16 )&0xff;
391 p_buffer->p_buffer[6] = ( i_timestamp >> 8 )&0xff;
392 p_buffer->p_buffer[7] = i_timestamp&0xff;
394 p_buffer->p_buffer[ 8] = ( p_sys->i_ssrc >> 24 )&0xff;
395 p_buffer->p_buffer[ 9] = ( p_sys->i_ssrc >> 16 )&0xff;
396 p_buffer->p_buffer[10] = ( p_sys->i_ssrc >> 8 )&0xff;
397 p_buffer->p_buffer[11] = p_sys->i_ssrc&0xff;
399 p_buffer->i_size = 12;
405 /*****************************************************************************
406 * ThreadWrite: Write a packet on the network at the good time.
407 *****************************************************************************/
408 static void ThreadWrite( vlc_object_t *p_this )
410 sout_access_thread_t *p_thread = (sout_access_thread_t*)p_this;
411 sout_instance_t *p_sout = p_thread->p_sout;
412 mtime_t i_date_last = -1;
414 while( ! p_thread->b_die )
417 mtime_t i_date, i_sent;
419 p_pk = sout_FifoGet( p_thread->p_fifo );
421 i_date = p_thread->i_caching + p_pk->i_dts;
422 if( i_date_last > 0 )
424 if( i_date - i_date_last > 2000000 )
426 msg_Dbg( p_thread, "mmh, hole > 2s -> drop" );
428 sout_BufferDelete( p_sout, p_pk );
429 i_date_last = i_date;
432 else if( i_date - i_date_last < 0 )
434 msg_Dbg( p_thread, "mmh, paquets in the past -> drop" );
436 sout_BufferDelete( p_sout, p_pk );
437 i_date_last = i_date;
443 send( p_thread->i_handle, p_pk->p_buffer, p_pk->i_size, 0 );
445 if ( i_sent > i_date + 20000 )
447 msg_Dbg( p_thread, "packet has been sent too late (" I64Fd ")",
450 sout_BufferDelete( p_sout, p_pk );
451 i_date_last = i_date;