1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2001, 2002 VideoLAN
5 * $Id: udp.c,v 1.15 2003/11/07 19:30:28 massiot 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 WriteRaw( sout_access_out_t *, sout_buffer_t * );
66 static int Seek ( sout_access_out_t *, off_t );
68 static void ThreadWrite( vlc_object_t * );
70 static sout_buffer_t *NewUDPPacket( sout_access_out_t *, mtime_t );
72 /*****************************************************************************
74 *****************************************************************************/
75 #define CACHING_TEXT N_("caching value in ms")
76 #define CACHING_LONGTEXT N_( \
77 "Allows you to modify the default caching value for udp streams. This " \
78 "value should be set in miliseconds units." )
81 set_description( _("UDP stream ouput") );
82 add_category_hint( N_("udp stream output"), NULL , VLC_TRUE );
83 add_integer( "udp-sout-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
84 set_capability( "sout access", 100 );
85 add_shortcut( "udp" );
86 add_shortcut( "rtp" ); // Will work only with ts muxer
87 set_callbacks( Open, Close );
90 typedef struct sout_access_thread_s
94 sout_instance_t *p_sout;
102 } sout_access_thread_t;
104 struct sout_access_out_sys_t
106 int b_rtpts; // 1 if add rtp/ts header
107 uint16_t i_sequence_number;
112 sout_buffer_t *p_buffer;
114 sout_access_thread_t *p_thread;
118 /*****************************************************************************
119 * Open: open the file
120 *****************************************************************************/
121 static int Open( vlc_object_t *p_this )
123 sout_access_out_t *p_access = (sout_access_out_t*)p_this;
124 sout_access_out_sys_t *p_sys;
131 network_socket_t socket_desc;
135 if( !( p_sys = p_access->p_sys =
136 malloc( sizeof( sout_access_out_sys_t ) ) ) )
138 msg_Err( p_access, "Not enough memory" );
139 return( VLC_EGENERIC );
143 if( p_access->psz_access != NULL &&
144 !strcmp( p_access->psz_access, "rtp" ) )
146 msg_Warn( p_access, "becarefull that rtp ouput work only with ts "
147 "payload(not an error)" );
155 psz_parser = strdup( p_access->psz_name );
157 psz_dst_addr = psz_parser;
160 if ( *psz_parser == '[' )
162 while( *psz_parser && *psz_parser != ']' )
167 while( *psz_parser && *psz_parser != ':' )
171 if( *psz_parser == ':' )
175 i_dst_port = atoi( psz_parser );
177 if( i_dst_port <= 0 )
179 i_dst_port = DEFAULT_PORT;
183 vlc_object_create( p_access, sizeof( sout_access_thread_t ) );
184 if( !p_sys->p_thread )
186 msg_Err( p_access, "out of memory" );
187 return( VLC_EGENERIC );
190 p_sys->p_thread->p_sout = p_access->p_sout;
191 p_sys->p_thread->b_die = 0;
192 p_sys->p_thread->b_error= 0;
193 p_sys->p_thread->p_fifo = sout_FifoCreate( p_access->p_sout );
195 socket_desc.i_type = NETWORK_UDP;
196 socket_desc.psz_server_addr = psz_dst_addr;
197 socket_desc.i_server_port = i_dst_port;
198 socket_desc.psz_bind_addr = "";
199 socket_desc.i_bind_port = 0;
200 socket_desc.i_ttl = 0;
201 if( ( val = sout_cfg_find_value( p_access->p_cfg, "ttl" ) ) )
203 socket_desc.i_ttl = atoi( val );
205 p_sys->p_thread->p_private = (void*)&socket_desc;
206 if( !( p_network = module_Need( p_sys->p_thread,
209 msg_Err( p_access, "failed to open a connection (udp)" );
210 return( VLC_EGENERIC );
212 module_Unneed( p_sys->p_thread, p_network );
214 p_sys->p_thread->i_handle = socket_desc.i_handle;
215 p_sys->p_thread->i_caching = config_GetInt( p_this, "udp-sout-caching" ) * 1000;
216 if( ( val = sout_cfg_find_value( p_access->p_cfg, "caching" ) ) )
218 p_sys->p_thread->i_caching = atoll( val ) * 1000;
221 p_sys->i_mtu = socket_desc.i_mtu;
223 if( vlc_thread_create( p_sys->p_thread, "sout write thread", ThreadWrite,
224 VLC_THREAD_PRIORITY_OUTPUT, VLC_FALSE ) )
226 msg_Err( p_access->p_sout, "cannot spawn sout access thread" );
227 vlc_object_destroy( p_sys->p_thread );
228 return( VLC_EGENERIC );
231 srand( (uint32_t)mdate());
232 p_sys->p_buffer = NULL;
233 p_sys->i_sequence_number = rand()&0xffff;
234 p_sys->i_ssrc = rand()&0xffffffff;
236 if( sout_cfg_find( p_access->p_cfg, "raw" ) )
238 p_access->pf_write = WriteRaw;
242 p_access->pf_write = Write;
244 p_access->pf_seek = Seek;
246 msg_Info( p_access, "Open: addr:`%s' port:`%d'",
247 psz_dst_addr, i_dst_port );
249 free( psz_dst_addr );
253 /*****************************************************************************
254 * Close: close the target
255 *****************************************************************************/
256 static void Close( vlc_object_t * p_this )
258 sout_access_out_t *p_access = (sout_access_out_t*)p_this;
259 sout_access_out_sys_t *p_sys = p_access->p_sys;
262 p_sys->p_thread->b_die = 1;
263 for( i = 0; i < 10; i++ )
265 sout_buffer_t *p_dummy;
267 p_dummy = sout_BufferNew( p_access->p_sout, p_sys->i_mtu );
270 p_dummy->i_length = 0;
271 sout_FifoPut( p_sys->p_thread->p_fifo, p_dummy );
273 vlc_thread_join( p_sys->p_thread );
275 sout_FifoDestroy( p_access->p_sout, p_sys->p_thread->p_fifo );
277 if( p_sys->p_buffer )
279 sout_BufferDelete( p_access->p_sout, p_sys->p_buffer );
282 #if defined( UNDER_CE )
283 CloseHandle( (HANDLE)p_sys->p_thread->i_handle );
284 #elif defined( WIN32 )
285 closesocket( p_sys->p_thread->i_handle );
287 close( p_sys->p_thread->i_handle );
291 msg_Info( p_access, "Close" );
294 /*****************************************************************************
295 * Read: standard read on a file descriptor.
296 *****************************************************************************/
297 static int Write( sout_access_out_t *p_access, sout_buffer_t *p_buffer )
299 sout_access_out_sys_t *p_sys = p_access->p_sys;
300 unsigned int i_write;
304 sout_buffer_t *p_next;
305 if( p_buffer->i_size > p_sys->i_mtu )
307 msg_Warn( p_access, "arggggggggggggg packet size > mtu" );
308 i_write = p_sys->i_mtu;
312 i_write = p_buffer->i_size;
315 /* if we have enough data, enque the buffer */
316 if( p_sys->p_buffer &&
317 p_sys->p_buffer->i_size + i_write > p_sys->i_mtu )
319 sout_FifoPut( p_sys->p_thread->p_fifo, p_sys->p_buffer );
320 p_sys->p_buffer = NULL;
323 if( !p_sys->p_buffer )
325 p_sys->p_buffer = NewUDPPacket( p_access, p_buffer->i_dts );
328 if( p_buffer->i_size > 0 )
330 memcpy( p_sys->p_buffer->p_buffer + p_sys->p_buffer->i_size,
331 p_buffer->p_buffer, i_write );
332 p_sys->p_buffer->i_size += i_write;
334 p_next = p_buffer->p_next;
335 sout_BufferDelete( p_access->p_sout, p_buffer );
339 return( p_sys->p_thread->b_error ? -1 : 0 );
342 /*****************************************************************************
343 * WriteRaw: write p_buffer without trying to fill mtu
344 *****************************************************************************/
345 static int WriteRaw( sout_access_out_t *p_access, sout_buffer_t *p_buffer )
347 sout_access_out_sys_t *p_sys = p_access->p_sys;
349 sout_FifoPut( p_sys->p_thread->p_fifo, p_buffer );
351 return( p_sys->p_thread->b_error ? -1 : 0 );
354 /*****************************************************************************
355 * Seek: seek to a specific location in a file
356 *****************************************************************************/
357 static int Seek( sout_access_out_t *p_access, off_t i_pos )
360 msg_Err( p_access, "udp sout access cannot seek" );
364 /*****************************************************************************
365 * NewUDPPacket: allocate a new UDP packet of size p_sys->i_mtu
366 *****************************************************************************/
367 static sout_buffer_t *NewUDPPacket( sout_access_out_t *p_access, mtime_t i_dts)
369 sout_access_out_sys_t *p_sys = p_access->p_sys;
370 sout_buffer_t *p_buffer;
372 p_buffer = sout_BufferNew( p_access->p_sout, p_sys->i_mtu );
373 p_buffer->i_dts = i_dts;
374 p_buffer->i_size = 0;
378 mtime_t i_timestamp = p_buffer->i_dts * 9 / 100;
380 /* add rtp/ts header */
381 p_buffer->p_buffer[0] = 0x80;
382 p_buffer->p_buffer[1] = 0x21; // mpeg2-ts
384 p_buffer->p_buffer[2] = ( p_sys->i_sequence_number >> 8 )&0xff;
385 p_buffer->p_buffer[3] = p_sys->i_sequence_number&0xff;
386 p_sys->i_sequence_number++;
388 p_buffer->p_buffer[4] = ( i_timestamp >> 24 )&0xff;
389 p_buffer->p_buffer[5] = ( i_timestamp >> 16 )&0xff;
390 p_buffer->p_buffer[6] = ( i_timestamp >> 8 )&0xff;
391 p_buffer->p_buffer[7] = i_timestamp&0xff;
393 p_buffer->p_buffer[ 8] = ( p_sys->i_ssrc >> 24 )&0xff;
394 p_buffer->p_buffer[ 9] = ( p_sys->i_ssrc >> 16 )&0xff;
395 p_buffer->p_buffer[10] = ( p_sys->i_ssrc >> 8 )&0xff;
396 p_buffer->p_buffer[11] = p_sys->i_ssrc&0xff;
398 p_buffer->i_size = 12;
404 /*****************************************************************************
405 * ThreadWrite: Write a packet on the network at the good time.
406 *****************************************************************************/
407 static void ThreadWrite( vlc_object_t *p_this )
409 sout_access_thread_t *p_thread = (sout_access_thread_t*)p_this;
410 sout_instance_t *p_sout = p_thread->p_sout;
411 mtime_t i_date_last = -1;
413 while( ! p_thread->b_die )
418 p_pk = sout_FifoGet( p_thread->p_fifo );
420 i_date = p_thread->i_caching + p_pk->i_dts;
421 if( i_date_last > 0 )
423 if( i_date - i_date_last > 2000000 )
425 msg_Dbg( p_thread, "mmh, hole > 2s -> drop" );
427 sout_BufferDelete( p_sout, p_pk );
428 i_date_last = i_date;
431 else if( i_date - i_date_last < -100000 )
433 msg_Dbg( p_thread, "mmh, paquets in the past -> drop" );
435 sout_BufferDelete( p_sout, p_pk );
436 i_date_last = i_date;
443 send( p_thread->i_handle, p_pk->p_buffer, p_pk->i_size, 0 );
444 sout_BufferDelete( p_sout, p_pk );
445 i_date_last = i_date;