* http: added alias "mmsh" to output as mmsh (work only with asfh). Only
[vlc.git] / modules / access_output / udp.c
1 /*****************************************************************************
2  * udp.c
3  *****************************************************************************
4  * Copyright (C) 2001, 2002 VideoLAN
5  * $Id: udp.c,v 1.13 2003/08/18 17:30:48 fenrir Exp $
6  *
7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8  *          Eric Petit <titer@videolan.org>
9  *
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.
14  *
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.
19  *
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  *****************************************************************************/
24
25 /*****************************************************************************
26  * Preamble
27  *****************************************************************************/
28 #include <stdlib.h>
29 #include <sys/types.h>
30 #include <sys/stat.h>
31 #include <string.h>
32 #include <errno.h>
33 #include <fcntl.h>
34
35 #include <vlc/vlc.h>
36 #include <vlc/input.h>
37 #include <vlc/sout.h>
38
39 #ifdef HAVE_UNISTD_H
40 #   include <unistd.h>
41 #endif
42
43 #ifdef WIN32
44 #   include <winsock2.h>
45 #   include <ws2tcpip.h>
46 #   ifndef IN_MULTICAST
47 #       define IN_MULTICAST(a) IN_CLASSD(a)
48 #   endif
49 #else
50 #   include <sys/socket.h>
51 #endif
52
53 #include "network.h"
54
55 #define DEFAULT_PORT 1234
56 #define LATENCY     100000
57 #define MAX_ERROR    500000
58 /*****************************************************************************
59  * Exported prototypes
60  *****************************************************************************/
61 static int     Open   ( vlc_object_t * );
62 static void    Close  ( vlc_object_t * );
63
64 static int     Write( sout_access_out_t *, sout_buffer_t * );
65 static int     Seek ( sout_access_out_t *, off_t  );
66
67 static void    ThreadWrite( vlc_object_t * );
68
69 static sout_buffer_t *NewUDPPacket( sout_access_out_t *, mtime_t );
70
71 /*****************************************************************************
72  * Module descriptor
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." )
78
79 vlc_module_begin();
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 );
87 vlc_module_end();
88
89 typedef struct sout_access_thread_s
90 {
91     VLC_COMMON_MEMBERS
92
93     sout_instance_t *p_sout;
94
95     sout_fifo_t *p_fifo;
96
97     int         i_handle;
98
99     int64_t     i_caching;
100
101 } sout_access_thread_t;
102
103 struct sout_access_out_sys_t
104 {
105     int                 b_rtpts;  // 1 if add rtp/ts header
106     uint16_t            i_sequence_number;
107     uint32_t            i_ssrc;
108
109     unsigned int        i_mtu;
110
111     sout_buffer_t       *p_buffer;
112
113     sout_access_thread_t *p_thread;
114
115 };
116
117 /*****************************************************************************
118  * Open: open the file
119  *****************************************************************************/
120 static int Open( vlc_object_t *p_this )
121 {
122     sout_access_out_t       *p_access = (sout_access_out_t*)p_this;
123     sout_access_out_sys_t   *p_sys;
124
125     char                *psz_parser;
126     char                *psz_dst_addr;
127     int                 i_dst_port;
128
129     module_t            *p_network;
130     network_socket_t    socket_desc;
131
132     char                *val;
133
134     if( !( p_sys = p_access->p_sys =
135                 malloc( sizeof( sout_access_out_sys_t ) ) ) )
136     {
137         msg_Err( p_access, "Not enough memory" );
138         return( VLC_EGENERIC );
139     }
140
141
142     if( p_access->psz_access != NULL &&
143         !strcmp( p_access->psz_access, "rtp" ) )
144     {
145         msg_Warn( p_access, "becarefull that rtp ouput work only with ts "
146                   "payload(not an error)" );
147         p_sys->b_rtpts = 1;
148     }
149     else
150     {
151         p_sys->b_rtpts = 0;
152     }
153
154     psz_parser = strdup( p_access->psz_name );
155
156     psz_dst_addr = psz_parser;
157     i_dst_port = 0;
158
159     if ( *psz_parser == '[' )
160     {
161         while( *psz_parser && *psz_parser != ']' )
162         {
163             psz_parser++;
164         }
165     }
166     while( *psz_parser && *psz_parser != ':' )
167     {
168         psz_parser++;
169     }
170     if( *psz_parser == ':' )
171     {
172         *psz_parser = '\0';
173         psz_parser++;
174         i_dst_port = atoi( psz_parser );
175     }
176     if( i_dst_port <= 0 )
177     {
178         i_dst_port = DEFAULT_PORT;
179     }
180
181     p_sys->p_thread =
182         vlc_object_create( p_access, sizeof( sout_access_thread_t ) );
183     if( !p_sys->p_thread )
184     {
185         msg_Err( p_access, "out of memory" );
186         return( VLC_EGENERIC );
187     }
188
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 );
193
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" ) ) )
201     {
202         socket_desc.i_ttl = atoi( val );
203     }
204     p_sys->p_thread->p_private = (void*)&socket_desc;
205     if( !( p_network = module_Need( p_sys->p_thread,
206                                     "network", "" ) ) )
207     {
208         msg_Err( p_access, "failed to open a connection (udp)" );
209         return( VLC_EGENERIC );
210     }
211     module_Unneed( p_sys->p_thread, p_network );
212
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" ) ) )
216     {
217         p_sys->p_thread->i_caching = atoll( val ) * 1000;
218     }
219     p_sys->i_mtu     = socket_desc.i_mtu;
220
221     if( vlc_thread_create( p_sys->p_thread, "sout write thread", ThreadWrite,
222                            VLC_THREAD_PRIORITY_OUTPUT, VLC_FALSE ) )
223     {
224         msg_Err( p_access->p_sout, "cannot spawn sout access thread" );
225         vlc_object_destroy( p_sys->p_thread );
226         return( VLC_EGENERIC );
227     }
228
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;
233
234     p_access->pf_write       = Write;
235     p_access->pf_seek        = Seek;
236
237     msg_Info( p_access, "Open: addr:`%s' port:`%d'",
238               psz_dst_addr, i_dst_port );
239
240     free( psz_dst_addr );
241     return VLC_SUCCESS;
242 }
243
244 /*****************************************************************************
245  * Close: close the target
246  *****************************************************************************/
247 static void Close( vlc_object_t * p_this )
248 {
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;
251     int                 i;
252
253     p_sys->p_thread->b_die = 1;
254     for( i = 0; i < 10; i++ )
255     {
256         sout_buffer_t       *p_dummy;
257
258         p_dummy = sout_BufferNew( p_access->p_sout, p_sys->i_mtu );
259         p_dummy->i_dts = 0;
260         p_dummy->i_pts = 0;
261         p_dummy->i_length = 0;
262         sout_FifoPut( p_sys->p_thread->p_fifo, p_dummy );
263     }
264     vlc_thread_join( p_sys->p_thread );
265
266     sout_FifoDestroy( p_access->p_sout, p_sys->p_thread->p_fifo );
267
268     if( p_sys->p_buffer )
269     {
270         sout_BufferDelete( p_access->p_sout, p_sys->p_buffer );
271     }
272
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 );
277 #else
278     close( p_sys->p_thread->i_handle );
279 #endif
280
281     free( p_sys );
282     msg_Info( p_access, "Close" );
283 }
284
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 )
289 {
290     sout_access_out_sys_t   *p_sys = p_access->p_sys;
291     unsigned int i_write;
292
293     while( p_buffer )
294     {
295         sout_buffer_t *p_next;
296         if( p_buffer->i_size > p_sys->i_mtu )
297         {
298             msg_Warn( p_access, "arggggggggggggg packet size > mtu" );
299             i_write = p_sys->i_mtu;
300         }
301         else
302         {
303             i_write = p_buffer->i_size;
304         }
305
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 )
309         {
310             sout_FifoPut( p_sys->p_thread->p_fifo, p_sys->p_buffer );
311             p_sys->p_buffer = NULL;
312         }
313
314         if( !p_sys->p_buffer )
315         {
316             p_sys->p_buffer = NewUDPPacket( p_access, p_buffer->i_dts );
317         }
318
319         if( p_buffer->i_size > 0 )
320         {
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;
324         }
325         p_next = p_buffer->p_next;
326         sout_BufferDelete( p_access->p_sout, p_buffer );
327         p_buffer = p_next;
328     }
329
330     return( p_sys->p_thread->b_error ? -1 : 0 );
331 }
332
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 )
337 {
338
339     msg_Err( p_access, "udp sout access cannot seek" );
340     return( -1 );
341 }
342
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)
347 {
348     sout_access_out_sys_t *p_sys = p_access->p_sys;
349     sout_buffer_t *p_buffer;
350
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;
354
355     if( p_sys->b_rtpts )
356     {
357         mtime_t i_timestamp = p_buffer->i_dts * 9 / 100;
358
359         /* add rtp/ts header */
360         p_buffer->p_buffer[0] = 0x80;
361         p_buffer->p_buffer[1] = 0x21; // mpeg2-ts
362
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++;
366
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;
371
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;
376
377         p_buffer->i_size = 12;
378     }
379
380     return p_buffer;
381 }
382
383 /*****************************************************************************
384  * ThreadWrite: Write a packet on the network at the good time.
385  *****************************************************************************/
386 static void ThreadWrite( vlc_object_t *p_this )
387 {
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;
391
392     while( ! p_thread->b_die )
393     {
394         sout_buffer_t *p_pk;
395         mtime_t       i_date;
396
397         p_pk = sout_FifoGet( p_thread->p_fifo );
398
399         i_date = p_thread->i_caching + p_pk->i_dts;
400         if( i_date_last > 0 )
401         {
402             if( i_date - i_date_last > 2000000 )
403             {
404                 msg_Dbg( p_thread, "mmh, hole > 2s -> drop" );
405
406                 sout_BufferDelete( p_sout, p_pk );
407                 i_date_last = i_date;
408                 continue;
409             }
410             else if( i_date - i_date_last < 0 )
411             {
412                 msg_Dbg( p_thread, "mmh, paquets in the past -> drop" );
413
414                 sout_BufferDelete( p_sout, p_pk );
415                 i_date_last = i_date;
416                 continue;
417             }
418         }
419
420
421         mwait( 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;
425     }
426 }