1 /*****************************************************************************
2 * bridge.c: bridge stream output module
3 *****************************************************************************
4 * Copyright (C) 2005 the VideoLAN team
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_block.h>
34 /*****************************************************************************
36 *****************************************************************************/
37 #define ID_TEXT N_("ID")
38 #define ID_LONGTEXT N_( \
39 "Integer identifier for this elementary stream. This will be used to " \
40 "\"find\" this stream later." )
42 #define DELAY_TEXT N_("Delay")
43 #define DELAY_LONGTEXT N_("Pictures coming from the picture video outputs " \
44 "will be delayed according to this value (in milliseconds, should be "\
45 ">= 100 ms). For high values, you will need to raise caching values." )
47 #define ID_OFFSET_TEXT N_("ID Offset")
48 #define ID_OFFSET_LONGTEXT N_("Offset to add to the stream IDs specified in " \
49 "bridge_out to obtain the stream IDs bridge_in will register.")
51 static int OpenOut ( vlc_object_t * );
52 static void CloseOut( vlc_object_t * );
53 static int OpenIn ( vlc_object_t * );
54 static void CloseIn ( vlc_object_t * );
56 #define SOUT_CFG_PREFIX_OUT "sout-bridge-out-"
57 #define SOUT_CFG_PREFIX_IN "sout-bridge-in-"
60 set_shortname( _("Bridge"));
61 set_description( _("Bridge stream output"));
63 set_section( N_("Bridge out"), NULL );
64 set_capability( "sout stream", 50 );
65 add_shortcut( "bridge-out" );
66 /* Only usable with VLM. No category so not in gui preferences
67 set_category( CAT_SOUT );
68 set_subcategory( SUBCAT_SOUT_STREAM );*/
69 add_integer( SOUT_CFG_PREFIX_OUT "id", 0, NULL, ID_TEXT, ID_LONGTEXT,
71 set_callbacks( OpenOut, CloseOut );
74 set_section( N_("Bridge in"), NULL );
75 set_capability( "sout stream", 50 );
76 add_shortcut( "bridge-in" );
77 /*set_category( CAT_SOUT );
78 set_subcategory( SUBCAT_SOUT_STREAM );*/
79 add_integer( SOUT_CFG_PREFIX_IN "delay", 0, NULL, DELAY_TEXT,
80 DELAY_LONGTEXT, VLC_FALSE );
81 add_integer( SOUT_CFG_PREFIX_IN "id-offset", 8192, NULL, ID_OFFSET_TEXT,
82 ID_OFFSET_LONGTEXT, VLC_FALSE );
83 set_callbacks( OpenIn, CloseIn );
85 var_Create( p_module->p_libvlc_global, "bridge-lock", VLC_VAR_MUTEX );
89 /*****************************************************************************
91 *****************************************************************************/
92 static const char *ppsz_sout_options_out[] = {
96 static const char *ppsz_sout_options_in[] = {
97 "delay", "id-offset", NULL
100 static sout_stream_id_t *AddOut ( sout_stream_t *, es_format_t * );
101 static int DelOut ( sout_stream_t *, sout_stream_id_t * );
102 static int SendOut( sout_stream_t *, sout_stream_id_t *, block_t * );
104 static sout_stream_id_t *AddIn ( sout_stream_t *, es_format_t * );
105 static int DelIn ( sout_stream_t *, sout_stream_id_t * );
106 static int SendIn( sout_stream_t *, sout_stream_id_t *, block_t * );
108 typedef struct bridged_es_t
116 sout_stream_id_t *id;
118 vlc_bool_t b_changed;
121 typedef struct bridge_t
123 bridged_es_t **pp_es;
127 #define GetBridge(a) __GetBridge( VLC_OBJECT(a) )
128 static bridge_t *__GetBridge( vlc_object_t *p_object )
130 libvlc_global_data_t *p_libvlc_global = p_object->p_libvlc_global;
134 if( var_Get( p_libvlc_global, "bridge-struct", &val ) != VLC_SUCCESS )
140 p_bridge = val.p_address;
151 typedef struct out_sout_stream_sys_t
157 } out_sout_stream_sys_t;
159 /*****************************************************************************
161 *****************************************************************************/
162 static int OpenOut( vlc_object_t *p_this )
164 sout_stream_t *p_stream = (sout_stream_t *)p_this;
165 out_sout_stream_sys_t *p_sys;
168 config_ChainParse( p_stream, SOUT_CFG_PREFIX_OUT, ppsz_sout_options_out,
171 p_sys = malloc( sizeof( out_sout_stream_sys_t ) );
172 p_sys->b_inited = VLC_FALSE;
174 var_Get( p_this->p_libvlc_global, "bridge-lock", &val );
175 p_sys->p_lock = val.p_address;
177 var_Get( p_stream, SOUT_CFG_PREFIX_OUT "id", &val );
178 p_sys->i_id = val.i_int;
180 p_stream->pf_add = AddOut;
181 p_stream->pf_del = DelOut;
182 p_stream->pf_send = SendOut;
184 p_stream->p_sys = (sout_stream_sys_t *)p_sys;
186 p_stream->p_sout->i_out_pace_nocontrol++;
191 /*****************************************************************************
193 *****************************************************************************/
194 static void CloseOut( vlc_object_t * p_this )
196 sout_stream_t *p_stream = (sout_stream_t*)p_this;
197 out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
199 p_stream->p_sout->i_out_pace_nocontrol--;
204 static sout_stream_id_t * AddOut( sout_stream_t *p_stream, es_format_t *p_fmt )
206 out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
211 if ( p_sys->b_inited )
215 p_sys->b_inited = VLC_TRUE;
217 vlc_mutex_lock( p_sys->p_lock );
219 p_bridge = GetBridge( p_stream );
220 if ( p_bridge == NULL )
222 libvlc_global_data_t *p_libvlc_global = p_stream->p_libvlc_global;
225 p_bridge = malloc( sizeof( bridge_t ) );
227 var_Create( p_libvlc_global, "bridge-struct", VLC_VAR_ADDRESS );
228 val.p_address = p_bridge;
229 var_Set( p_libvlc_global, "bridge-struct", val );
231 p_bridge->i_es_num = 0;
232 p_bridge->pp_es = NULL;
235 for ( i = 0; i < p_bridge->i_es_num; i++ )
237 if ( p_bridge->pp_es[i]->b_empty && !p_bridge->pp_es[i]->b_changed )
241 if ( i == p_bridge->i_es_num )
243 p_bridge->pp_es = realloc( p_bridge->pp_es,
244 (p_bridge->i_es_num + 1)
245 * sizeof(bridged_es_t *) );
246 p_bridge->i_es_num++;
247 p_bridge->pp_es[i] = malloc( sizeof(bridged_es_t) );
250 p_sys->p_es = p_es = p_bridge->pp_es[i];
253 p_es->fmt.i_id = p_sys->i_id;
254 p_es->p_block = NULL;
255 p_es->pp_last = &p_es->p_block;
256 p_es->b_empty = VLC_FALSE;
260 p_es->b_changed = VLC_TRUE;
262 msg_Dbg( p_stream, "bridging out input codec=%4.4s id=%d pos=%d",
263 (char*)&p_es->fmt.i_codec, p_es->fmt.i_id, i );
265 vlc_mutex_unlock( p_sys->p_lock );
267 return (sout_stream_id_t *)p_sys;
270 static int DelOut( sout_stream_t *p_stream, sout_stream_id_t *id )
272 out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
275 if ( !p_sys->b_inited )
280 vlc_mutex_lock( p_sys->p_lock );
284 p_es->b_empty = VLC_TRUE;
285 block_ChainRelease( p_es->p_block );
286 p_es->p_block = VLC_FALSE;
288 p_es->b_changed = VLC_TRUE;
289 vlc_mutex_unlock( p_sys->p_lock );
291 p_sys->b_inited = VLC_FALSE;
296 static int SendOut( sout_stream_t *p_stream, sout_stream_id_t *id,
299 out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
302 if ( (out_sout_stream_sys_t *)id != p_sys )
304 block_ChainRelease( p_buffer );
308 vlc_mutex_lock( p_sys->p_lock );
311 *p_es->pp_last = p_buffer;
312 while ( p_buffer != NULL )
314 p_es->pp_last = &p_buffer->p_next;
315 p_buffer = p_buffer->p_next;
318 vlc_mutex_unlock( p_sys->p_lock );
328 typedef struct in_sout_stream_sys_t
330 sout_stream_t *p_out;
334 } in_sout_stream_sys_t;
336 /*****************************************************************************
338 *****************************************************************************/
339 static int OpenIn( vlc_object_t *p_this )
341 sout_stream_t *p_stream = (sout_stream_t*)p_this;
342 in_sout_stream_sys_t *p_sys;
345 p_sys = malloc( sizeof( in_sout_stream_sys_t ) );
347 p_sys->p_out = sout_StreamNew( p_stream->p_sout, p_stream->psz_next );
350 msg_Err( p_stream, "cannot create chain" );
355 config_ChainParse( p_stream, SOUT_CFG_PREFIX_IN, ppsz_sout_options_in,
358 var_Get( p_this->p_libvlc_global, "bridge-lock", &val );
359 p_sys->p_lock = val.p_address;
361 var_Get( p_stream, SOUT_CFG_PREFIX_IN "id-offset", &val );
362 p_sys->i_id_offset = val.i_int;
364 var_Get( p_stream, SOUT_CFG_PREFIX_IN "delay", &val );
365 p_sys->i_delay = (mtime_t)val.i_int * 1000;
367 p_stream->pf_add = AddIn;
368 p_stream->pf_del = DelIn;
369 p_stream->pf_send = SendIn;
371 p_stream->p_sys = (sout_stream_sys_t *)p_sys;
373 /* update p_sout->i_out_pace_nocontrol */
374 p_stream->p_sout->i_out_pace_nocontrol++;
379 /*****************************************************************************
381 *****************************************************************************/
382 static void CloseIn( vlc_object_t * p_this )
384 sout_stream_t *p_stream = (sout_stream_t*)p_this;
385 in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
387 sout_StreamDelete( p_sys->p_out );
388 p_stream->p_sout->i_out_pace_nocontrol--;
393 static sout_stream_id_t * AddIn( sout_stream_t *p_stream, es_format_t *p_fmt )
395 in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
397 return p_sys->p_out->pf_add( p_sys->p_out, p_fmt );
400 static int DelIn( sout_stream_t *p_stream, sout_stream_id_t *id )
402 in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
404 return p_sys->p_out->pf_del( p_sys->p_out, id );
407 static int SendIn( sout_stream_t *p_stream, sout_stream_id_t *id,
410 in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
412 vlc_bool_t b_no_es = VLC_TRUE;
415 /* First forward the packet for our own ES */
416 p_sys->p_out->pf_send( p_sys->p_out, id, p_buffer );
418 /* Then check all bridged streams */
419 vlc_mutex_lock( p_sys->p_lock );
421 p_bridge = GetBridge( p_stream );
422 if ( p_bridge == NULL )
424 vlc_mutex_unlock( p_sys->p_lock );
428 for ( i = 0; i < p_bridge->i_es_num; i++ )
430 if ( !p_bridge->pp_es[i]->b_empty )
433 while ( p_bridge->pp_es[i]->p_block != NULL
434 && (p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
436 || p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
437 < p_bridge->pp_es[i]->i_last) )
439 block_t *p_block = p_bridge->pp_es[i]->p_block;
440 msg_Dbg( p_stream, "dropping a packet (" I64Fd ")",
441 mdate() - p_block->i_dts - p_sys->i_delay );
442 p_bridge->pp_es[i]->p_block
443 = p_bridge->pp_es[i]->p_block->p_next;
444 block_Release( p_block );
447 if ( p_bridge->pp_es[i]->p_block == NULL )
449 p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
452 if ( p_bridge->pp_es[i]->b_changed )
454 if ( p_bridge->pp_es[i]->b_empty && p_bridge->pp_es[i]->id != NULL )
456 p_sys->p_out->pf_del( p_sys->p_out, p_bridge->pp_es[i]->id );
460 /* We need at least two packets to enter the mux. */
461 if ( p_bridge->pp_es[i]->p_block == NULL
462 || p_bridge->pp_es[i]->p_block->p_next == NULL )
467 p_bridge->pp_es[i]->fmt.i_id += p_sys->i_id_offset;
468 p_bridge->pp_es[i]->id = p_sys->p_out->pf_add(
469 p_sys->p_out, &p_bridge->pp_es[i]->fmt );
470 if ( p_bridge->pp_es[i]->id == NULL )
472 msg_Warn( p_stream, "couldn't create chain for id %d",
473 p_bridge->pp_es[i]->fmt.i_id );
475 msg_Dbg( p_stream, "bridging in input codec=%4.4s id=%d pos=%d",
476 (char*)&p_bridge->pp_es[i]->fmt.i_codec,
477 p_bridge->pp_es[i]->fmt.i_id, i );
480 p_bridge->pp_es[i]->b_changed = VLC_FALSE;
482 if ( p_bridge->pp_es[i]->b_empty )
485 if ( p_bridge->pp_es[i]->p_block == NULL )
487 if ( p_bridge->pp_es[i]->id != NULL
488 && p_bridge->pp_es[i]->i_last < mdate() )
490 p_sys->p_out->pf_del( p_sys->p_out, p_bridge->pp_es[i]->id );
491 p_bridge->pp_es[i]->fmt.i_id -= p_sys->i_id_offset;
492 p_bridge->pp_es[i]->b_changed = VLC_TRUE;
493 p_bridge->pp_es[i]->id = NULL;
498 if ( p_bridge->pp_es[i]->id != NULL )
500 block_t *p_block = p_bridge->pp_es[i]->p_block;
501 while ( p_block != NULL )
503 p_bridge->pp_es[i]->i_last = p_block->i_dts;
504 p_block->i_pts += p_sys->i_delay;
505 p_block->i_dts += p_sys->i_delay;
506 p_block = p_block->p_next;
508 p_sys->p_out->pf_send( p_sys->p_out, p_bridge->pp_es[i]->id,
509 p_bridge->pp_es[i]->p_block );
513 block_ChainRelease( p_bridge->pp_es[i]->p_block );
516 p_bridge->pp_es[i]->p_block = NULL;
517 p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
522 libvlc_global_data_t *p_libvlc_global = p_stream->p_libvlc_global;
523 for ( i = 0; i < p_bridge->i_es_num; i++ )
524 free( p_bridge->pp_es[i] );
525 free( p_bridge->pp_es );
527 var_Destroy( p_libvlc_global, "bridge-struct" );
530 vlc_mutex_unlock( p_sys->p_lock );