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 *****************************************************************************/
33 /*****************************************************************************
35 *****************************************************************************/
36 #define ID_TEXT N_("ID")
37 #define ID_LONGTEXT N_( \
38 "Integer identifier for this elementary stream. This will be used to " \
39 "\"find\" this stream later." )
41 #define DELAY_TEXT N_("Delay")
42 #define DELAY_LONGTEXT N_("Pictures coming from the picture video outputs " \
43 "will be delayed according to this value (in milliseconds, should be "\
44 ">= 100 ms). For high values, you will need to raise caching values." )
46 #define ID_OFFSET_TEXT N_("ID Offset")
47 #define ID_OFFSET_LONGTEXT N_("Offset to add to the stream IDs specified in " \
48 "bridge_out to obtain the stream IDs bridge_in will register.")
50 static int OpenOut ( vlc_object_t * );
51 static void CloseOut( vlc_object_t * );
52 static int OpenIn ( vlc_object_t * );
53 static void CloseIn ( vlc_object_t * );
55 #define SOUT_CFG_PREFIX_OUT "sout-bridge-out-"
56 #define SOUT_CFG_PREFIX_IN "sout-bridge-in-"
59 set_shortname( _("Bridge"));
60 set_description( _("Bridge stream output"));
62 set_section( N_("Bridge out"), NULL );
63 set_capability( "sout stream", 50 );
64 add_shortcut( "bridge-out" );
65 /* Only usable with VLM. No category so not in gui preferences
66 set_category( CAT_SOUT );
67 set_subcategory( SUBCAT_SOUT_STREAM );*/
68 add_integer( SOUT_CFG_PREFIX_OUT "id", 0, NULL, ID_TEXT, ID_LONGTEXT,
70 set_callbacks( OpenOut, CloseOut );
73 set_section( N_("Bridge in"), NULL );
74 set_capability( "sout stream", 50 );
75 add_shortcut( "bridge-in" );
76 /*set_category( CAT_SOUT );
77 set_subcategory( SUBCAT_SOUT_STREAM );*/
78 add_integer( SOUT_CFG_PREFIX_IN "delay", 0, NULL, DELAY_TEXT,
79 DELAY_LONGTEXT, VLC_FALSE );
80 add_integer( SOUT_CFG_PREFIX_IN "id-offset", 8192, NULL, ID_OFFSET_TEXT,
81 ID_OFFSET_LONGTEXT, VLC_FALSE );
82 set_callbacks( OpenIn, CloseIn );
84 var_Create( p_module->p_libvlc_global, "bridge-lock", VLC_VAR_MUTEX );
88 /*****************************************************************************
90 *****************************************************************************/
91 static const char *ppsz_sout_options_out[] = {
95 static const char *ppsz_sout_options_in[] = {
96 "delay", "id-offset", NULL
99 static sout_stream_id_t *AddOut ( sout_stream_t *, es_format_t * );
100 static int DelOut ( sout_stream_t *, sout_stream_id_t * );
101 static int SendOut( sout_stream_t *, sout_stream_id_t *, block_t * );
103 static sout_stream_id_t *AddIn ( sout_stream_t *, es_format_t * );
104 static int DelIn ( sout_stream_t *, sout_stream_id_t * );
105 static int SendIn( sout_stream_t *, sout_stream_id_t *, block_t * );
107 typedef struct bridged_es_t
115 sout_stream_id_t *id;
117 vlc_bool_t b_changed;
120 typedef struct bridge_t
122 bridged_es_t **pp_es;
126 #define GetBridge(a) __GetBridge( VLC_OBJECT(a) )
127 static bridge_t *__GetBridge( vlc_object_t *p_object )
129 libvlc_global_data_t *p_libvlc_global = p_object->p_libvlc_global;
133 if( var_Get( p_libvlc_global, "bridge-struct", &val ) != VLC_SUCCESS )
139 p_bridge = val.p_address;
150 typedef struct out_sout_stream_sys_t
156 } out_sout_stream_sys_t;
158 /*****************************************************************************
160 *****************************************************************************/
161 static int OpenOut( vlc_object_t *p_this )
163 sout_stream_t *p_stream = (sout_stream_t *)p_this;
164 out_sout_stream_sys_t *p_sys;
167 sout_CfgParse( p_stream, SOUT_CFG_PREFIX_OUT, ppsz_sout_options_out,
170 p_sys = malloc( sizeof( out_sout_stream_sys_t ) );
171 p_sys->b_inited = VLC_FALSE;
173 var_Get( p_this->p_libvlc_global, "bridge-lock", &val );
174 p_sys->p_lock = val.p_address;
176 var_Get( p_stream, SOUT_CFG_PREFIX_OUT "id", &val );
177 p_sys->i_id = val.i_int;
179 p_stream->pf_add = AddOut;
180 p_stream->pf_del = DelOut;
181 p_stream->pf_send = SendOut;
183 p_stream->p_sys = (sout_stream_sys_t *)p_sys;
185 p_stream->p_sout->i_out_pace_nocontrol++;
190 /*****************************************************************************
192 *****************************************************************************/
193 static void CloseOut( vlc_object_t * p_this )
195 sout_stream_t *p_stream = (sout_stream_t*)p_this;
196 out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
198 p_stream->p_sout->i_out_pace_nocontrol--;
203 static sout_stream_id_t * AddOut( sout_stream_t *p_stream, es_format_t *p_fmt )
205 out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
210 if ( p_sys->b_inited )
214 p_sys->b_inited = VLC_TRUE;
216 vlc_mutex_lock( p_sys->p_lock );
218 p_bridge = GetBridge( p_stream );
219 if ( p_bridge == NULL )
221 libvlc_global_data_t *p_libvlc_global = p_stream->p_libvlc_global;
224 p_bridge = malloc( sizeof( bridge_t ) );
226 var_Create( p_libvlc_global, "bridge-struct", VLC_VAR_ADDRESS );
227 val.p_address = p_bridge;
228 var_Set( p_libvlc_global, "bridge-struct", val );
230 p_bridge->i_es_num = 0;
231 p_bridge->pp_es = NULL;
234 for ( i = 0; i < p_bridge->i_es_num; i++ )
236 if ( p_bridge->pp_es[i]->b_empty && !p_bridge->pp_es[i]->b_changed )
240 if ( i == p_bridge->i_es_num )
242 p_bridge->pp_es = realloc( p_bridge->pp_es,
243 (p_bridge->i_es_num + 1)
244 * sizeof(bridged_es_t *) );
245 p_bridge->i_es_num++;
246 p_bridge->pp_es[i] = malloc( sizeof(bridged_es_t) );
249 p_sys->p_es = p_es = p_bridge->pp_es[i];
252 p_es->fmt.i_id = p_sys->i_id;
253 p_es->p_block = NULL;
254 p_es->pp_last = &p_es->p_block;
255 p_es->b_empty = VLC_FALSE;
259 p_es->b_changed = VLC_TRUE;
261 msg_Dbg( p_stream, "bridging out input codec=%4.4s id=%d pos=%d",
262 (char*)&p_es->fmt.i_codec, p_es->fmt.i_id, i );
264 vlc_mutex_unlock( p_sys->p_lock );
266 return (sout_stream_id_t *)p_sys;
269 static int DelOut( sout_stream_t *p_stream, sout_stream_id_t *id )
271 out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
274 if ( !p_sys->b_inited )
279 vlc_mutex_lock( p_sys->p_lock );
283 p_es->b_empty = VLC_TRUE;
284 block_ChainRelease( p_es->p_block );
285 p_es->p_block = VLC_FALSE;
287 p_es->b_changed = VLC_TRUE;
288 vlc_mutex_unlock( p_sys->p_lock );
290 p_sys->b_inited = VLC_FALSE;
295 static int SendOut( sout_stream_t *p_stream, sout_stream_id_t *id,
298 out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
301 if ( (out_sout_stream_sys_t *)id != p_sys )
303 block_ChainRelease( p_buffer );
307 vlc_mutex_lock( p_sys->p_lock );
310 *p_es->pp_last = p_buffer;
311 while ( p_buffer != NULL )
313 p_es->pp_last = &p_buffer->p_next;
314 p_buffer = p_buffer->p_next;
317 vlc_mutex_unlock( p_sys->p_lock );
327 typedef struct in_sout_stream_sys_t
329 sout_stream_t *p_out;
333 } in_sout_stream_sys_t;
335 /*****************************************************************************
337 *****************************************************************************/
338 static int OpenIn( vlc_object_t *p_this )
340 sout_stream_t *p_stream = (sout_stream_t*)p_this;
341 in_sout_stream_sys_t *p_sys;
344 p_sys = malloc( sizeof( in_sout_stream_sys_t ) );
346 p_sys->p_out = sout_StreamNew( p_stream->p_sout, p_stream->psz_next );
349 msg_Err( p_stream, "cannot create chain" );
354 sout_CfgParse( p_stream, SOUT_CFG_PREFIX_IN, ppsz_sout_options_in,
357 var_Get( p_this->p_libvlc_global, "bridge-lock", &val );
358 p_sys->p_lock = val.p_address;
360 var_Get( p_stream, SOUT_CFG_PREFIX_IN "id-offset", &val );
361 p_sys->i_id_offset = val.i_int;
363 var_Get( p_stream, SOUT_CFG_PREFIX_IN "delay", &val );
364 p_sys->i_delay = (mtime_t)val.i_int * 1000;
366 p_stream->pf_add = AddIn;
367 p_stream->pf_del = DelIn;
368 p_stream->pf_send = SendIn;
370 p_stream->p_sys = (sout_stream_sys_t *)p_sys;
372 /* update p_sout->i_out_pace_nocontrol */
373 p_stream->p_sout->i_out_pace_nocontrol++;
378 /*****************************************************************************
380 *****************************************************************************/
381 static void CloseIn( vlc_object_t * p_this )
383 sout_stream_t *p_stream = (sout_stream_t*)p_this;
384 in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
386 sout_StreamDelete( p_sys->p_out );
387 p_stream->p_sout->i_out_pace_nocontrol--;
392 static sout_stream_id_t * AddIn( sout_stream_t *p_stream, es_format_t *p_fmt )
394 in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
396 return p_sys->p_out->pf_add( p_sys->p_out, p_fmt );
399 static int DelIn( sout_stream_t *p_stream, sout_stream_id_t *id )
401 in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
403 return p_sys->p_out->pf_del( p_sys->p_out, id );
406 static int SendIn( sout_stream_t *p_stream, sout_stream_id_t *id,
409 in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
411 vlc_bool_t b_no_es = VLC_TRUE;
414 /* First forward the packet for our own ES */
415 p_sys->p_out->pf_send( p_sys->p_out, id, p_buffer );
417 /* Then check all bridged streams */
418 vlc_mutex_lock( p_sys->p_lock );
420 p_bridge = GetBridge( p_stream );
421 if ( p_bridge == NULL )
423 vlc_mutex_unlock( p_sys->p_lock );
427 for ( i = 0; i < p_bridge->i_es_num; i++ )
429 if ( !p_bridge->pp_es[i]->b_empty )
432 while ( p_bridge->pp_es[i]->p_block != NULL
433 && (p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
435 || p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
436 < p_bridge->pp_es[i]->i_last) )
438 block_t *p_block = p_bridge->pp_es[i]->p_block;
439 msg_Dbg( p_stream, "dropping a packet (" I64Fd ")",
440 mdate() - p_block->i_dts - p_sys->i_delay );
441 p_bridge->pp_es[i]->p_block
442 = p_bridge->pp_es[i]->p_block->p_next;
443 block_Release( p_block );
446 if ( p_bridge->pp_es[i]->p_block == NULL )
448 p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
451 if ( p_bridge->pp_es[i]->b_changed )
453 if ( p_bridge->pp_es[i]->b_empty && p_bridge->pp_es[i]->id != NULL )
455 p_sys->p_out->pf_del( p_sys->p_out, p_bridge->pp_es[i]->id );
459 /* We need at least two packets to enter the mux. */
460 if ( p_bridge->pp_es[i]->p_block == NULL
461 || p_bridge->pp_es[i]->p_block->p_next == NULL )
466 p_bridge->pp_es[i]->fmt.i_id += p_sys->i_id_offset;
467 p_bridge->pp_es[i]->id = p_sys->p_out->pf_add(
468 p_sys->p_out, &p_bridge->pp_es[i]->fmt );
469 if ( p_bridge->pp_es[i]->id == NULL )
471 msg_Warn( p_stream, "couldn't create chain for id %d",
472 p_bridge->pp_es[i]->fmt.i_id );
474 msg_Dbg( p_stream, "bridging in input codec=%4.4s id=%d pos=%d",
475 (char*)&p_bridge->pp_es[i]->fmt.i_codec,
476 p_bridge->pp_es[i]->fmt.i_id, i );
479 p_bridge->pp_es[i]->b_changed = VLC_FALSE;
481 if ( p_bridge->pp_es[i]->b_empty )
484 if ( p_bridge->pp_es[i]->p_block == NULL )
486 if ( p_bridge->pp_es[i]->id != NULL
487 && p_bridge->pp_es[i]->i_last < mdate() )
489 p_sys->p_out->pf_del( p_sys->p_out, p_bridge->pp_es[i]->id );
490 p_bridge->pp_es[i]->fmt.i_id -= p_sys->i_id_offset;
491 p_bridge->pp_es[i]->b_changed = VLC_TRUE;
492 p_bridge->pp_es[i]->id = NULL;
497 if ( p_bridge->pp_es[i]->id != NULL )
499 block_t *p_block = p_bridge->pp_es[i]->p_block;
500 while ( p_block != NULL )
502 p_bridge->pp_es[i]->i_last = p_block->i_dts;
503 p_block->i_pts += p_sys->i_delay;
504 p_block->i_dts += p_sys->i_delay;
505 p_block = p_block->p_next;
507 p_sys->p_out->pf_send( p_sys->p_out, p_bridge->pp_es[i]->id,
508 p_bridge->pp_es[i]->p_block );
512 block_ChainRelease( p_bridge->pp_es[i]->p_block );
515 p_bridge->pp_es[i]->p_block = NULL;
516 p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
521 libvlc_global_data_t *p_libvlc_global = p_stream->p_libvlc_global;
522 for ( i = 0; i < p_bridge->i_es_num; i++ )
523 free( p_bridge->pp_es[i] );
524 free( p_bridge->pp_es );
526 var_Destroy( p_libvlc_global, "bridge-struct" );
529 vlc_mutex_unlock( p_sys->p_lock );