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 *****************************************************************************/
30 #include <vlc_block.h>
32 /*****************************************************************************
34 *****************************************************************************/
35 #define ID_TEXT N_("ID")
36 #define ID_LONGTEXT N_( \
37 "Integer identifier for this elementary stream. This will be used to " \
38 "\"find\" this stream later." )
40 #define DELAY_TEXT N_("Delay")
41 #define DELAY_LONGTEXT N_("Pictures coming from the picture video outputs " \
42 "will be delayed according to this value (in milliseconds, should be "\
43 ">= 100 ms). For high values, you will need to raise caching values." )
45 #define ID_OFFSET_TEXT N_("ID Offset")
46 #define ID_OFFSET_LONGTEXT N_("Offset to add to the stream IDs specified in " \
47 "bridge_out to obtain the stream IDs bridge_in will register.")
49 static int OpenOut ( vlc_object_t * );
50 static void CloseOut( vlc_object_t * );
51 static int OpenIn ( vlc_object_t * );
52 static void CloseIn ( vlc_object_t * );
54 #define SOUT_CFG_PREFIX_OUT "sout-bridge-out-"
55 #define SOUT_CFG_PREFIX_IN "sout-bridge-in-"
58 set_shortname( _("Bridge"));
59 set_description( _("Bridge stream output"));
61 set_section( N_("Bridge out"), NULL );
62 set_capability( "sout stream", 50 );
63 add_shortcut( "bridge-out" );
64 /* Only usable with VLM. No category so not in gui preferences
65 set_category( CAT_SOUT );
66 set_subcategory( SUBCAT_SOUT_STREAM );*/
67 add_integer( SOUT_CFG_PREFIX_OUT "id", 0, NULL, ID_TEXT, ID_LONGTEXT,
69 set_callbacks( OpenOut, CloseOut );
72 set_section( N_("Bridge in"), NULL );
73 set_capability( "sout stream", 50 );
74 add_shortcut( "bridge-in" );
75 /*set_category( CAT_SOUT );
76 set_subcategory( SUBCAT_SOUT_STREAM );*/
77 add_integer( SOUT_CFG_PREFIX_IN "delay", 0, NULL, DELAY_TEXT,
78 DELAY_LONGTEXT, VLC_FALSE );
79 add_integer( SOUT_CFG_PREFIX_IN "id-offset", 8192, NULL, ID_OFFSET_TEXT,
80 ID_OFFSET_LONGTEXT, VLC_FALSE );
81 set_callbacks( OpenIn, CloseIn );
86 /*****************************************************************************
88 *****************************************************************************/
89 static const char *ppsz_sout_options_out[] = {
93 static const char *ppsz_sout_options_in[] = {
94 "delay", "id-offset", NULL
97 static sout_stream_id_t *AddOut ( sout_stream_t *, es_format_t * );
98 static int DelOut ( sout_stream_t *, sout_stream_id_t * );
99 static int SendOut( sout_stream_t *, sout_stream_id_t *, block_t * );
101 static sout_stream_id_t *AddIn ( sout_stream_t *, es_format_t * );
102 static int DelIn ( sout_stream_t *, sout_stream_id_t * );
103 static int SendIn( sout_stream_t *, sout_stream_id_t *, block_t * );
105 typedef struct bridged_es_t
113 sout_stream_id_t *id;
115 vlc_bool_t b_changed;
118 typedef struct bridge_t
120 bridged_es_t **pp_es;
124 #define GetBridge(a) __GetBridge( VLC_OBJECT(a) )
125 static bridge_t *__GetBridge( vlc_object_t *p_object )
130 if( var_Get( p_object->p_libvlc, "bridge-struct", &val ) )
136 p_bridge = val.p_address;
147 typedef struct out_sout_stream_sys_t
153 } out_sout_stream_sys_t;
155 /*****************************************************************************
157 *****************************************************************************/
158 static int OpenOut( vlc_object_t *p_this )
160 sout_stream_t *p_stream = (sout_stream_t *)p_this;
161 out_sout_stream_sys_t *p_sys;
164 config_ChainParse( p_stream, SOUT_CFG_PREFIX_OUT, ppsz_sout_options_out,
167 p_sys = malloc( sizeof( out_sout_stream_sys_t ) );
168 p_sys->b_inited = VLC_FALSE;
170 var_Create( p_this->p_libvlc, "bridge-lock", VLC_VAR_MUTEX );
171 var_Get( p_this->p_libvlc, "bridge-lock", &val );
172 p_sys->p_lock = val.p_address;
174 var_Get( p_stream, SOUT_CFG_PREFIX_OUT "id", &val );
175 p_sys->i_id = val.i_int;
177 p_stream->pf_add = AddOut;
178 p_stream->pf_del = DelOut;
179 p_stream->pf_send = SendOut;
181 p_stream->p_sys = (sout_stream_sys_t *)p_sys;
183 p_stream->p_sout->i_out_pace_nocontrol++;
188 /*****************************************************************************
190 *****************************************************************************/
191 static void CloseOut( vlc_object_t * p_this )
193 sout_stream_t *p_stream = (sout_stream_t*)p_this;
194 out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
196 p_stream->p_sout->i_out_pace_nocontrol--;
201 static sout_stream_id_t * AddOut( sout_stream_t *p_stream, es_format_t *p_fmt )
203 out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
208 if ( p_sys->b_inited )
212 p_sys->b_inited = VLC_TRUE;
214 vlc_mutex_lock( p_sys->p_lock );
216 p_bridge = GetBridge( p_stream );
217 if ( p_bridge == NULL )
219 vlc_object_t *p_libvlc = p_stream->p_libvlc;
222 p_bridge = malloc( sizeof( bridge_t ) );
224 var_Create( p_libvlc, "bridge-struct", VLC_VAR_ADDRESS );
225 val.p_address = p_bridge;
226 var_Set( p_libvlc, "bridge-struct", val );
228 p_bridge->i_es_num = 0;
229 p_bridge->pp_es = NULL;
232 for ( i = 0; i < p_bridge->i_es_num; i++ )
234 if ( p_bridge->pp_es[i]->b_empty && !p_bridge->pp_es[i]->b_changed )
238 if ( i == p_bridge->i_es_num )
240 p_bridge->pp_es = realloc( p_bridge->pp_es,
241 (p_bridge->i_es_num + 1)
242 * sizeof(bridged_es_t *) );
243 p_bridge->i_es_num++;
244 p_bridge->pp_es[i] = malloc( sizeof(bridged_es_t) );
247 p_sys->p_es = p_es = p_bridge->pp_es[i];
250 p_es->fmt.i_id = p_sys->i_id;
251 p_es->p_block = NULL;
252 p_es->pp_last = &p_es->p_block;
253 p_es->b_empty = VLC_FALSE;
257 p_es->b_changed = VLC_TRUE;
259 msg_Dbg( p_stream, "bridging out input codec=%4.4s id=%d pos=%d",
260 (char*)&p_es->fmt.i_codec, p_es->fmt.i_id, i );
262 vlc_mutex_unlock( p_sys->p_lock );
264 return (sout_stream_id_t *)p_sys;
267 static int DelOut( sout_stream_t *p_stream, sout_stream_id_t *id )
269 out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
272 if ( !p_sys->b_inited )
277 vlc_mutex_lock( p_sys->p_lock );
281 p_es->b_empty = VLC_TRUE;
282 block_ChainRelease( p_es->p_block );
283 p_es->p_block = VLC_FALSE;
285 p_es->b_changed = VLC_TRUE;
286 vlc_mutex_unlock( p_sys->p_lock );
288 p_sys->b_inited = VLC_FALSE;
293 static int SendOut( sout_stream_t *p_stream, sout_stream_id_t *id,
296 out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
299 if ( (out_sout_stream_sys_t *)id != p_sys )
301 block_ChainRelease( p_buffer );
305 vlc_mutex_lock( p_sys->p_lock );
308 *p_es->pp_last = p_buffer;
309 while ( p_buffer != NULL )
311 p_es->pp_last = &p_buffer->p_next;
312 p_buffer = p_buffer->p_next;
315 vlc_mutex_unlock( p_sys->p_lock );
325 typedef struct in_sout_stream_sys_t
327 sout_stream_t *p_out;
331 } in_sout_stream_sys_t;
333 /*****************************************************************************
335 *****************************************************************************/
336 static int OpenIn( vlc_object_t *p_this )
338 sout_stream_t *p_stream = (sout_stream_t*)p_this;
339 in_sout_stream_sys_t *p_sys;
342 p_sys = malloc( sizeof( in_sout_stream_sys_t ) );
344 p_sys->p_out = sout_StreamNew( p_stream->p_sout, p_stream->psz_next );
347 msg_Err( p_stream, "cannot create chain" );
352 config_ChainParse( p_stream, SOUT_CFG_PREFIX_IN, ppsz_sout_options_in,
355 var_Create( p_this->p_libvlc, "bridge-lock", VLC_VAR_MUTEX );
356 var_Get( p_this->p_libvlc, "bridge-lock", &val );
357 p_sys->p_lock = val.p_address;
359 var_Get( p_stream, SOUT_CFG_PREFIX_IN "id-offset", &val );
360 p_sys->i_id_offset = val.i_int;
362 var_Get( p_stream, SOUT_CFG_PREFIX_IN "delay", &val );
363 p_sys->i_delay = (mtime_t)val.i_int * 1000;
365 p_stream->pf_add = AddIn;
366 p_stream->pf_del = DelIn;
367 p_stream->pf_send = SendIn;
369 p_stream->p_sys = (sout_stream_sys_t *)p_sys;
371 /* update p_sout->i_out_pace_nocontrol */
372 p_stream->p_sout->i_out_pace_nocontrol++;
377 /*****************************************************************************
379 *****************************************************************************/
380 static void CloseIn( vlc_object_t * p_this )
382 sout_stream_t *p_stream = (sout_stream_t*)p_this;
383 in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
385 sout_StreamDelete( p_sys->p_out );
386 p_stream->p_sout->i_out_pace_nocontrol--;
391 static sout_stream_id_t * AddIn( sout_stream_t *p_stream, es_format_t *p_fmt )
393 in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
395 return p_sys->p_out->pf_add( p_sys->p_out, p_fmt );
398 static int DelIn( sout_stream_t *p_stream, sout_stream_id_t *id )
400 in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
402 return p_sys->p_out->pf_del( p_sys->p_out, id );
405 static int SendIn( sout_stream_t *p_stream, sout_stream_id_t *id,
408 in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
410 vlc_bool_t b_no_es = VLC_TRUE;
413 /* First forward the packet for our own ES */
414 p_sys->p_out->pf_send( p_sys->p_out, id, p_buffer );
416 /* Then check all bridged streams */
417 vlc_mutex_lock( p_sys->p_lock );
419 p_bridge = GetBridge( p_stream );
420 if ( p_bridge == NULL )
422 vlc_mutex_unlock( p_sys->p_lock );
426 for ( i = 0; i < p_bridge->i_es_num; i++ )
428 if ( !p_bridge->pp_es[i]->b_empty )
431 while ( p_bridge->pp_es[i]->p_block != NULL
432 && (p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
434 || p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
435 < p_bridge->pp_es[i]->i_last) )
437 block_t *p_block = p_bridge->pp_es[i]->p_block;
438 msg_Dbg( p_stream, "dropping a packet (" I64Fd ")",
439 mdate() - p_block->i_dts - p_sys->i_delay );
440 p_bridge->pp_es[i]->p_block
441 = p_bridge->pp_es[i]->p_block->p_next;
442 block_Release( p_block );
445 if ( p_bridge->pp_es[i]->p_block == NULL )
447 p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
450 if ( p_bridge->pp_es[i]->b_changed )
452 if ( p_bridge->pp_es[i]->b_empty && p_bridge->pp_es[i]->id != NULL )
454 p_sys->p_out->pf_del( p_sys->p_out, p_bridge->pp_es[i]->id );
458 /* We need at least two packets to enter the mux. */
459 if ( p_bridge->pp_es[i]->p_block == NULL
460 || p_bridge->pp_es[i]->p_block->p_next == NULL )
465 p_bridge->pp_es[i]->fmt.i_id += p_sys->i_id_offset;
466 p_bridge->pp_es[i]->id = p_sys->p_out->pf_add(
467 p_sys->p_out, &p_bridge->pp_es[i]->fmt );
468 if ( p_bridge->pp_es[i]->id == NULL )
470 msg_Warn( p_stream, "couldn't create chain for id %d",
471 p_bridge->pp_es[i]->fmt.i_id );
473 msg_Dbg( p_stream, "bridging in input codec=%4.4s id=%d pos=%d",
474 (char*)&p_bridge->pp_es[i]->fmt.i_codec,
475 p_bridge->pp_es[i]->fmt.i_id, i );
478 p_bridge->pp_es[i]->b_changed = VLC_FALSE;
480 if ( p_bridge->pp_es[i]->b_empty )
483 if ( p_bridge->pp_es[i]->p_block == NULL )
485 if ( p_bridge->pp_es[i]->id != NULL
486 && p_bridge->pp_es[i]->i_last < mdate() )
488 p_sys->p_out->pf_del( p_sys->p_out, p_bridge->pp_es[i]->id );
489 p_bridge->pp_es[i]->fmt.i_id -= p_sys->i_id_offset;
490 p_bridge->pp_es[i]->b_changed = VLC_TRUE;
491 p_bridge->pp_es[i]->id = NULL;
496 if ( p_bridge->pp_es[i]->id != NULL )
498 block_t *p_block = p_bridge->pp_es[i]->p_block;
499 while ( p_block != NULL )
501 p_bridge->pp_es[i]->i_last = p_block->i_dts;
502 p_block->i_pts += p_sys->i_delay;
503 p_block->i_dts += p_sys->i_delay;
504 p_block = p_block->p_next;
506 p_sys->p_out->pf_send( p_sys->p_out, p_bridge->pp_es[i]->id,
507 p_bridge->pp_es[i]->p_block );
511 block_ChainRelease( p_bridge->pp_es[i]->p_block );
514 p_bridge->pp_es[i]->p_block = NULL;
515 p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
520 vlc_object_t *p_libvlc = p_stream->p_libvlc;
521 for ( i = 0; i < p_bridge->i_es_num; i++ )
522 free( p_bridge->pp_es[i] );
523 free( p_bridge->pp_es );
525 var_Destroy( p_libvlc, "bridge-struct" );
528 vlc_mutex_unlock( p_sys->p_lock );