1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2001, 2002 VideoLAN
5 * $Id: udp.c,v 1.13 2003/08/18 17:30:48 fenrir 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 #define LATENCY 100000
57 #define MAX_ERROR 500000
58 /*****************************************************************************
60 *****************************************************************************/
61 static int Open ( vlc_object_t * );
62 static void Close ( vlc_object_t * );
64 static int Write( sout_access_out_t *, sout_buffer_t * );
65 static int Seek ( sout_access_out_t *, off_t );
67 static void ThreadWrite( vlc_object_t * );
69 static sout_buffer_t *NewUDPPacket( sout_access_out_t *, mtime_t );
71 /*****************************************************************************
73 *****************************************************************************/
74 #define CACHING_TEXT N_("caching value in ms")
75 #define CACHING_LONGTEXT N_( \
76 "Allows you to modify the default caching value for udp streams. This " \
77 "value should be set in miliseconds units." )
80 set_description( _("UDP stream ouput") );
81 add_category_hint( N_("udp stream output"), NULL , VLC_TRUE );
82 add_integer( "udp-sout-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
83 set_capability( "sout access", 100 );
84 add_shortcut( "udp" );
85 add_shortcut( "rtp" ); // Will work only with ts muxer
86 set_callbacks( Open, Close );
89 typedef struct sout_access_thread_s
93 sout_instance_t *p_sout;
101 } sout_access_thread_t;
103 struct sout_access_out_sys_t
105 int b_rtpts; // 1 if add rtp/ts header
106 uint16_t i_sequence_number;
111 sout_buffer_t *p_buffer;
113 sout_access_thread_t *p_thread;
117 /*****************************************************************************
118 * Open: open the file
119 *****************************************************************************/
120 static int Open( vlc_object_t *p_this )
122 sout_access_out_t *p_access = (sout_access_out_t*)p_this;
123 sout_access_out_sys_t *p_sys;
130 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" );
138 return( VLC_EGENERIC );
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" );
186 return( VLC_EGENERIC );
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( ( val = sout_cfg_find_value( p_access->p_cfg, "ttl" ) ) )
202 socket_desc.i_ttl = atoi( val );
204 p_sys->p_thread->p_private = (void*)&socket_desc;
205 if( !( p_network = module_Need( p_sys->p_thread,
208 msg_Err( p_access, "failed to open a connection (udp)" );
209 return( VLC_EGENERIC );
211 module_Unneed( p_sys->p_thread, p_network );
213 p_sys->p_thread->i_handle = socket_desc.i_handle;
214 p_sys->p_thread->i_caching = config_GetInt( p_this, "udp-sout-caching" ) * 1000;
215 if( ( val = sout_cfg_find_value( p_access->p_cfg, "caching" ) ) )
217 p_sys->p_thread->i_caching = atoll( val ) * 1000;
219 p_sys->i_mtu = socket_desc.i_mtu;
221 if( vlc_thread_create( p_sys->p_thread, "sout write thread", ThreadWrite,
222 VLC_THREAD_PRIORITY_OUTPUT, VLC_FALSE ) )
224 msg_Err( p_access->p_sout, "cannot spawn sout access thread" );
225 vlc_object_destroy( p_sys->p_thread );
226 return( VLC_EGENERIC );
229 srand( (uint32_t)mdate());
230 p_sys->p_buffer = NULL;
231 p_sys->i_sequence_number = rand()&0xffff;
232 p_sys->i_ssrc = rand()&0xffffffff;
234 p_access->pf_write = Write;
235 p_access->pf_seek = Seek;
237 msg_Info( p_access, "Open: addr:`%s' port:`%d'",
238 psz_dst_addr, i_dst_port );
240 free( psz_dst_addr );
244 /*****************************************************************************
245 * Close: close the target
246 *****************************************************************************/
247 static void Close( vlc_object_t * p_this )
249 sout_access_out_t *p_access = (sout_access_out_t*)p_this;
250 sout_access_out_sys_t *p_sys = p_access->p_sys;
253 p_sys->p_thread->b_die = 1;
254 for( i = 0; i < 10; i++ )
256 sout_buffer_t *p_dummy;
258 p_dummy = sout_BufferNew( p_access->p_sout, p_sys->i_mtu );
261 p_dummy->i_length = 0;
262 sout_FifoPut( p_sys->p_thread->p_fifo, p_dummy );
264 vlc_thread_join( p_sys->p_thread );
266 sout_FifoDestroy( p_access->p_sout, p_sys->p_thread->p_fifo );
268 if( p_sys->p_buffer )
270 sout_BufferDelete( p_access->p_sout, p_sys->p_buffer );
273 #if defined( UNDER_CE )
274 CloseHandle( (HANDLE)p_sys->p_thread->i_handle );
275 #elif defined( WIN32 )
276 closesocket( p_sys->p_thread->i_handle );
278 close( p_sys->p_thread->i_handle );
282 msg_Info( p_access, "Close" );
285 /*****************************************************************************
286 * Read: standard read on a file descriptor.
287 *****************************************************************************/
288 static int Write( sout_access_out_t *p_access, sout_buffer_t *p_buffer )
290 sout_access_out_sys_t *p_sys = p_access->p_sys;
291 unsigned int i_write;
295 sout_buffer_t *p_next;
296 if( p_buffer->i_size > p_sys->i_mtu )
298 msg_Warn( p_access, "arggggggggggggg packet size > mtu" );
299 i_write = p_sys->i_mtu;
303 i_write = p_buffer->i_size;
306 /* if we have enough data, enque the buffer */
307 if( p_sys->p_buffer &&
308 p_sys->p_buffer->i_size + i_write > p_sys->i_mtu )
310 sout_FifoPut( p_sys->p_thread->p_fifo, p_sys->p_buffer );
311 p_sys->p_buffer = NULL;
314 if( !p_sys->p_buffer )
316 p_sys->p_buffer = NewUDPPacket( p_access, p_buffer->i_dts );
319 if( p_buffer->i_size > 0 )
321 memcpy( p_sys->p_buffer->p_buffer + p_sys->p_buffer->i_size,
322 p_buffer->p_buffer, i_write );
323 p_sys->p_buffer->i_size += i_write;
325 p_next = p_buffer->p_next;
326 sout_BufferDelete( p_access->p_sout, p_buffer );
330 return( p_sys->p_thread->b_error ? -1 : 0 );
333 /*****************************************************************************
334 * Seek: seek to a specific location in a file
335 *****************************************************************************/
336 static int Seek( sout_access_out_t *p_access, off_t i_pos )
339 msg_Err( p_access, "udp sout access cannot seek" );
343 /*****************************************************************************
344 * NewUDPPacket: allocate a new UDP packet of size p_sys->i_mtu
345 *****************************************************************************/
346 static sout_buffer_t *NewUDPPacket( sout_access_out_t *p_access, mtime_t i_dts)
348 sout_access_out_sys_t *p_sys = p_access->p_sys;
349 sout_buffer_t *p_buffer;
351 p_buffer = sout_BufferNew( p_access->p_sout, p_sys->i_mtu );
352 p_buffer->i_dts = i_dts;
353 p_buffer->i_size = 0;
357 mtime_t i_timestamp = p_buffer->i_dts * 9 / 100;
359 /* add rtp/ts header */
360 p_buffer->p_buffer[0] = 0x80;
361 p_buffer->p_buffer[1] = 0x21; // mpeg2-ts
363 p_buffer->p_buffer[2] = ( p_sys->i_sequence_number >> 8 )&0xff;
364 p_buffer->p_buffer[3] = p_sys->i_sequence_number&0xff;
365 p_sys->i_sequence_number++;
367 p_buffer->p_buffer[4] = ( i_timestamp >> 24 )&0xff;
368 p_buffer->p_buffer[5] = ( i_timestamp >> 16 )&0xff;
369 p_buffer->p_buffer[6] = ( i_timestamp >> 8 )&0xff;
370 p_buffer->p_buffer[7] = i_timestamp&0xff;
372 p_buffer->p_buffer[ 8] = ( p_sys->i_ssrc >> 24 )&0xff;
373 p_buffer->p_buffer[ 9] = ( p_sys->i_ssrc >> 16 )&0xff;
374 p_buffer->p_buffer[10] = ( p_sys->i_ssrc >> 8 )&0xff;
375 p_buffer->p_buffer[11] = p_sys->i_ssrc&0xff;
377 p_buffer->i_size = 12;
383 /*****************************************************************************
384 * ThreadWrite: Write a packet on the network at the good time.
385 *****************************************************************************/
386 static void ThreadWrite( vlc_object_t *p_this )
388 sout_access_thread_t *p_thread = (sout_access_thread_t*)p_this;
389 sout_instance_t *p_sout = p_thread->p_sout;
390 mtime_t i_date_last = -1;
392 while( ! p_thread->b_die )
397 p_pk = sout_FifoGet( p_thread->p_fifo );
399 i_date = p_thread->i_caching + p_pk->i_dts;
400 if( i_date_last > 0 )
402 if( i_date - i_date_last > 2000000 )
404 msg_Dbg( p_thread, "mmh, hole > 2s -> drop" );
406 sout_BufferDelete( p_sout, p_pk );
407 i_date_last = i_date;
410 else if( i_date - i_date_last < 0 )
412 msg_Dbg( p_thread, "mmh, paquets in the past -> drop" );
414 sout_BufferDelete( p_sout, p_pk );
415 i_date_last = i_date;
422 send( p_thread->i_handle, p_pk->p_buffer, p_pk->i_size, 0 );
423 sout_BufferDelete( p_sout, p_pk );
424 i_date_last = i_date;