1 /*****************************************************************************
2 * vlc_input.h: Core input structures
3 *****************************************************************************
4 * Copyright (C) 1999-2015 VLC authors and VideoLAN
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
8 * Laurent Aimar <fenrir@via.ecp.fr>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
29 * \defgroup input Input
33 * Input thread interface
39 #include <vlc_events.h>
40 #include <vlc_input_item.h>
41 #include <vlc_vout_osd.h>
45 /*****************************************************************************
46 * Seek point: (generalisation of chapters)
47 *****************************************************************************/
50 int64_t i_time_offset
;
54 static inline seekpoint_t
*vlc_seekpoint_New( void )
56 seekpoint_t
*point
= (seekpoint_t
*)malloc( sizeof( seekpoint_t
) );
59 point
->i_time_offset
= -1;
60 point
->psz_name
= NULL
;
64 static inline void vlc_seekpoint_Delete( seekpoint_t
*point
)
67 free( point
->psz_name
);
71 static inline seekpoint_t
*vlc_seekpoint_Duplicate( const seekpoint_t
*src
)
73 seekpoint_t
*point
= vlc_seekpoint_New();
76 if( src
->psz_name
) point
->psz_name
= strdup( src
->psz_name
);
77 point
->i_time_offset
= src
->i_time_offset
;
82 /*****************************************************************************
84 *****************************************************************************/
86 /* input_title_t.i_flags field */
87 #define INPUT_TITLE_MENU 0x01 /* Menu title */
88 #define INPUT_TITLE_INTERACTIVE 0x02 /* Interactive title. Playback position has no meaning. */
90 typedef struct input_title_t
94 int64_t i_length
; /* Length(microsecond) if known, else 0 */
96 unsigned i_flags
; /* Is it a menu or a normal entry */
100 seekpoint_t
**seekpoint
;
103 static inline input_title_t
*vlc_input_title_New(void)
105 input_title_t
*t
= (input_title_t
*)malloc( sizeof( input_title_t
) );
118 static inline void vlc_input_title_Delete( input_title_t
*t
)
125 for( i
= 0; i
< t
->i_seekpoint
; i
++ )
126 vlc_seekpoint_Delete( t
->seekpoint
[i
] );
127 free( t
->seekpoint
);
131 static inline input_title_t
*vlc_input_title_Duplicate( const input_title_t
*t
)
133 input_title_t
*dup
= vlc_input_title_New( );
134 if( dup
== NULL
) return NULL
;
136 if( t
->psz_name
) dup
->psz_name
= strdup( t
->psz_name
);
137 dup
->i_flags
= t
->i_flags
;
138 dup
->i_length
= t
->i_length
;
139 if( t
->i_seekpoint
> 0 )
141 dup
->seekpoint
= (seekpoint_t
**)malloc( t
->i_seekpoint
* sizeof(seekpoint_t
*) );
142 if( likely(dup
->seekpoint
) )
144 for( int i
= 0; i
< t
->i_seekpoint
; i
++ )
145 dup
->seekpoint
[i
] = vlc_seekpoint_Duplicate( t
->seekpoint
[i
] );
146 dup
->i_seekpoint
= t
->i_seekpoint
;
153 /*****************************************************************************
155 *****************************************************************************/
156 struct input_attachment_t
160 char *psz_description
;
166 static inline void vlc_input_attachment_Delete( input_attachment_t
*a
)
172 free( a
->psz_description
);
178 static inline input_attachment_t
*vlc_input_attachment_New( const char *psz_name
,
179 const char *psz_mime
,
180 const char *psz_description
,
184 input_attachment_t
*a
= (input_attachment_t
*)malloc( sizeof (*a
) );
185 if( unlikely(a
== NULL
) )
188 a
->psz_name
= strdup( psz_name
? psz_name
: "" );
189 a
->psz_mime
= strdup( psz_mime
? psz_mime
: "" );
190 a
->psz_description
= strdup( psz_description
? psz_description
: "" );
192 a
->p_data
= malloc( i_data
);
193 if( i_data
> 0 && likely(a
->p_data
!= NULL
) )
194 memcpy( a
->p_data
, p_data
, i_data
);
196 if( unlikely(a
->psz_name
== NULL
|| a
->psz_mime
== NULL
197 || a
->psz_description
== NULL
|| (i_data
> 0 && a
->p_data
== NULL
)) )
199 vlc_input_attachment_Delete( a
);
205 static inline input_attachment_t
*vlc_input_attachment_Duplicate( const input_attachment_t
*a
)
207 return vlc_input_attachment_New( a
->psz_name
, a
->psz_mime
, a
->psz_description
,
208 a
->p_data
, a
->i_data
);
211 /*****************************************************************************
212 * input defines/constants.
213 *****************************************************************************/
216 * This defines an opaque input resource handler.
218 typedef struct input_resource_t input_resource_t
;
221 * Main structure representing an input thread. This structure is mostly
222 * private. The only public fields are read-only and constant.
224 struct input_thread_t
230 * Record prefix string.
231 * TODO make it configurable.
233 #define INPUT_RECORD_PREFIX "vlc-record-%Y-%m-%d-%Hh%Mm%Ss-$ N-$ p"
235 /*****************************************************************************
236 * Input events and variables
237 *****************************************************************************/
240 * \defgroup inputvariable Input variables
242 * The input provides multiples variable you can write to and/or read from.
244 * TODO complete the documentation.
245 * The read only variables are:
247 * - "can-seek" (if you can seek, it doesn't say if 'bar display' has be shown
248 * or not, for that check position != 0.0)
252 * - "can-record" (if a stream can be recorded while playing)
253 * - "teletext-es" (list of id from the spu tracks (spu-es) that are teletext, the
254 * variable value being the one currently selected, -1 if no teletext)
256 * - "signal-strength"
257 * - "program-scrambled" (if the current program is scrambled)
258 * - "cache" (level of data cached [0 .. 1])
260 * The read-write variables are:
261 * - state (\see input_state_e)
264 * - time, time-offset
265 * - title, next-title, prev-title
266 * - chapter, next-chapter, next-chapter-prev
267 * - program, audio-es, video-es, spu-es
268 * - audio-delay, spu-delay
269 * - bookmark (bookmark list)
272 * - navigation (list of "title %2i")
275 * The variable used for event is
276 * - intf-event (\see input_event_type_e)
282 * This enum is used by the variable "state"
284 typedef enum input_state_e
297 * It is an float used by the variable "rate" in the
298 * range [INPUT_RATE_DEFAULT/INPUT_RATE_MAX, INPUT_RATE_DEFAULT/INPUT_RATE_MIN]
299 * the default value being 1. It represents the ratio of playback speed to
300 * nominal speed (bigger is faster).
302 * Internally, the rate is stored as a value in the range
303 * [INPUT_RATE_MIN, INPUT_RATE_MAX].
304 * internal rate = INPUT_RATE_DEFAULT / rate variable
310 #define INPUT_RATE_DEFAULT 1000
314 #define INPUT_RATE_MIN 32 /* Up to 32/1 */
318 #define INPUT_RATE_MAX 32000 /* Up to 1/32 */
323 * You can catch input event by adding a callback on the variable "intf-event".
324 * This variable is an integer that will hold a input_event_type_e value.
326 typedef enum input_event_type_e
328 /* "state" has changed */
333 /* "rate" has changed */
336 /* At least one of "position" or "time" */
337 INPUT_EVENT_POSITION
,
339 /* "length" has changed */
342 /* A title has been added or removed or selected.
343 * It implies that the chapter has changed (no chapter event is sent) */
345 /* A chapter has been added or removed or selected. */
348 /* A program ("program") has been added or removed or selected,
349 * or "program-scrambled" has changed.*/
351 /* A ES has been added or removed or selected */
353 /* "teletext-es" has changed */
354 INPUT_EVENT_TELETEXT
,
356 /* "record" has changed */
359 /* input_item_t media has changed */
360 INPUT_EVENT_ITEM_META
,
361 /* input_item_t info has changed */
362 INPUT_EVENT_ITEM_INFO
,
363 /* input_item_t epg has changed */
364 INPUT_EVENT_ITEM_EPG
,
366 /* Input statistics have been updated */
367 INPUT_EVENT_STATISTICS
,
368 /* At least one of "signal-quality" or "signal-strength" has changed */
371 /* "audio-delay" has changed */
372 INPUT_EVENT_AUDIO_DELAY
,
373 /* "spu-delay" has changed */
374 INPUT_EVENT_SUBTITLE_DELAY
,
376 /* "bookmark" has changed */
377 INPUT_EVENT_BOOKMARK
,
379 /* cache" has changed */
382 /* A audio_output_t object has been created/deleted by *the input* */
384 /* A vout_thread_t object has been created/deleted by *the input* */
387 } input_event_type_e
;
394 /* input variable "position" */
395 INPUT_GET_POSITION
, /* arg1= double * res= */
396 INPUT_SET_POSITION
, /* arg1= double res=can fail */
398 /* input variable "length" */
399 INPUT_GET_LENGTH
, /* arg1= int64_t * res=can fail */
401 /* input variable "time" */
402 INPUT_GET_TIME
, /* arg1= int64_t * res= */
403 INPUT_SET_TIME
, /* arg1= int64_t res=can fail */
405 /* input variable "rate" (nominal is INPUT_RATE_DEFAULT) */
406 INPUT_GET_RATE
, /* arg1= int * res= */
407 INPUT_SET_RATE
, /* arg1= int res=can fail */
409 /* input variable "state" */
410 INPUT_GET_STATE
, /* arg1= int * res= */
411 INPUT_SET_STATE
, /* arg1= int res=can fail */
413 /* input variable "audio-delay" and "sub-delay" */
414 INPUT_GET_AUDIO_DELAY
, /* arg1 = int* res=can fail */
415 INPUT_SET_AUDIO_DELAY
, /* arg1 = int res=can fail */
416 INPUT_GET_SPU_DELAY
, /* arg1 = int* res=can fail */
417 INPUT_SET_SPU_DELAY
, /* arg1 = int res=can fail */
419 /* Menu (VCD/DVD/BD) Navigation */
420 /** Activate the navigation item selected. res=can fail */
422 /** Use the up arrow to select a navigation item above. res=can fail */
424 /** Use the down arrow to select a navigation item under. res=can fail */
426 /** Use the left arrow to select a navigation item on the left. res=can fail */
428 /** Use the right arrow to select a navigation item on the right. res=can fail */
430 /** Activate the popup Menu (for BD). res=can fail */
432 /** Activate disc Root Menu. res=can fail */
436 INPUT_ADD_INFO
, /* arg1= char* arg2= char* arg3=... res=can fail */
437 INPUT_REPLACE_INFOS
,/* arg1= info_category_t * res=cannot fail */
438 INPUT_MERGE_INFOS
,/* arg1= info_category_t * res=cannot fail */
439 INPUT_DEL_INFO
, /* arg1= char* arg2= char* res=can fail */
442 INPUT_GET_BOOKMARK
, /* arg1= seekpoint_t * res=can fail */
443 INPUT_GET_BOOKMARKS
, /* arg1= seekpoint_t *** arg2= int * res=can fail */
444 INPUT_CLEAR_BOOKMARKS
, /* res=can fail */
445 INPUT_ADD_BOOKMARK
, /* arg1= seekpoint_t * res=can fail */
446 INPUT_CHANGE_BOOKMARK
, /* arg1= seekpoint_t * arg2= int * res=can fail */
447 INPUT_DEL_BOOKMARK
, /* arg1= seekpoint_t * res=can fail */
448 INPUT_SET_BOOKMARK
, /* arg1= int res=can fail */
451 INPUT_GET_TITLE_INFO
, /* arg1=input_title_t** arg2= int * res=can fail */
452 INPUT_GET_FULL_TITLE_INFO
, /* arg1=input_title_t*** arg2= int * res=can fail */
455 INPUT_GET_SEEKPOINTS
, /* arg1=seekpoint_t*** arg2= int * res=can fail */
458 INPUT_GET_ATTACHMENTS
, /* arg1=input_attachment_t***, arg2=int* res=can fail */
459 INPUT_GET_ATTACHMENT
, /* arg1=input_attachment_t**, arg2=char* res=can fail */
461 /* On the fly input slave */
462 INPUT_ADD_SLAVE
, /* arg1= enum slave_type, arg2= const char *, arg3= bool */
463 INPUT_ADD_SUBTITLE
, /* arg1= const char *, arg2=bool b_check_extension */
465 /* On the fly record while playing */
466 INPUT_SET_RECORD_STATE
, /* arg1=bool res=can fail */
467 INPUT_GET_RECORD_STATE
, /* arg1=bool* res=can fail */
470 INPUT_RESTART_ES
, /* arg1=int (-AUDIO/VIDEO/SPU_ES for the whole category) */
473 INPUT_UPDATE_VIEWPOINT
, /* arg1=(const vlc_viewpoint_t*), arg2=bool b_absolute */
476 * XXX You must call vlc_object_release as soon as possible */
477 INPUT_GET_AOUT
, /* arg1=audio_output_t ** res=can fail */
478 INPUT_GET_VOUTS
, /* arg1=vout_thread_t ***, size_t * res=can fail */
479 INPUT_GET_ES_OBJECTS
, /* arg1=int id, vlc_object_t **dec, vout_thread_t **, audio_output_t ** */
481 /* External clock managments */
482 INPUT_GET_PCR_SYSTEM
, /* arg1=mtime_t *, arg2=mtime_t * res=can fail */
483 INPUT_MODIFY_PCR_SYSTEM
,/* arg1=int absolute, arg2=mtime_t res=can fail */
488 /*****************************************************************************
490 *****************************************************************************/
492 VLC_API input_thread_t
* input_Create( vlc_object_t
*p_parent
, input_item_t
*, const char *psz_log
, input_resource_t
* ) VLC_USED
;
493 #define input_Create(a,b,c,d) input_Create(VLC_OBJECT(a),b,c,d)
495 VLC_API
int input_Start( input_thread_t
* );
497 VLC_API
void input_Stop( input_thread_t
* );
499 VLC_API
int input_Read( vlc_object_t
*, input_item_t
* );
500 #define input_Read(a,b) input_Read(VLC_OBJECT(a),b)
502 VLC_API
int input_vaControl( input_thread_t
*, int i_query
, va_list );
504 VLC_API
int input_Control( input_thread_t
*, int i_query
, ... );
506 VLC_API
void input_Close( input_thread_t
* );
509 * Create a new input_thread_t and start it.
511 * Provided for convenience.
516 input_thread_t
*input_CreateAndStart( vlc_object_t
*parent
,
517 input_item_t
*item
, const char *log
)
519 input_thread_t
*input
= input_Create( parent
, item
, log
, NULL
);
520 if( input
!= NULL
&& input_Start( input
) )
522 vlc_object_release( input
);
527 #define input_CreateAndStart(a,b,c) input_CreateAndStart(VLC_OBJECT(a),b,c)
530 * Get the input item for an input thread
532 * You have to keep a reference to the input or to the input_item_t until
533 * you do not need it anymore.
535 VLC_API input_item_t
* input_GetItem( input_thread_t
* ) VLC_USED
;
538 * It will return the current state of the input.
539 * Provided for convenience.
541 static inline input_state_e
input_GetState( input_thread_t
* p_input
)
543 input_state_e state
= INIT_S
;
544 input_Control( p_input
, INPUT_GET_STATE
, &state
);
549 * Return one of the video output (if any). If possible, you should use
550 * INPUT_GET_VOUTS directly and process _all_ video outputs instead.
551 * @param p_input an input thread from which to get a video output
552 * @return NULL on error, or a video output thread pointer (which needs to be
553 * released with vlc_object_release()).
555 static inline vout_thread_t
*input_GetVout( input_thread_t
*p_input
)
557 vout_thread_t
**pp_vout
, *p_vout
;
560 if( input_Control( p_input
, INPUT_GET_VOUTS
, &pp_vout
, &i_vout
) )
563 for( size_t i
= 1; i
< i_vout
; i
++ )
564 vlc_object_release( (vlc_object_t
*)(pp_vout
[i
]) );
566 p_vout
= (i_vout
>= 1) ? pp_vout
[0] : NULL
;
572 * It will add a new subtitle source to the input.
573 * Provided for convenience.
575 static inline int input_AddSubtitleOSD( input_thread_t
*p_input
, const char *psz_path
,
576 bool b_check_extension
, bool b_osd
)
578 int i_result
= input_Control( p_input
, INPUT_ADD_SUBTITLE
, psz_path
, b_check_extension
);
579 if( i_result
!= VLC_SUCCESS
|| !b_osd
)
582 vout_thread_t
*p_vout
= input_GetVout( p_input
);
585 vout_OSDMessage(p_vout
, SPU_DEFAULT_CHANNEL
, "%s",
586 vlc_gettext("Subtitle track added") );
587 vlc_object_release( (vlc_object_t
*)p_vout
);
591 #define input_AddSubtitle(a, b, c) input_AddSubtitleOSD(a, b, c, false)
593 static inline int input_AddSlave( input_thread_t
*p_input
, enum slave_type type
,
594 const char *psz_uri
, bool b_forced
)
596 return input_Control( p_input
, INPUT_ADD_SLAVE
, type
, psz_uri
, b_forced
);
600 * Update the viewpoint of the input thread. The viewpoint will be applied to
601 * all vouts and aouts.
603 * @param p_input an input thread
604 * @param p_viewpoint the viewpoint value
605 * @param b_absolute if true replace the old viewpoint with the new one. If
606 * false, increase/decrease it.
607 * @return VLC_SUCCESS or a VLC error code
609 static inline int input_UpdateViewpoint( input_thread_t
*p_input
,
610 const vlc_viewpoint_t
*p_viewpoint
,
613 return input_Control( p_input
, INPUT_UPDATE_VIEWPOINT
, p_viewpoint
,
618 * Return the audio output (if any) associated with an input.
619 * @param p_input an input thread
620 * @return NULL on error, or the audio output (which needs to be
621 * released with vlc_object_release()).
623 static inline audio_output_t
*input_GetAout( input_thread_t
*p_input
)
625 audio_output_t
*p_aout
;
626 return input_Control( p_input
, INPUT_GET_AOUT
, &p_aout
) ? NULL
: p_aout
;
630 * Returns the objects associated to an ES.
632 * You must release all non NULL object using vlc_object_release.
633 * You may set pointer of pointer to NULL to avoid retreiving it.
635 static inline int input_GetEsObjects( input_thread_t
*p_input
, int i_id
,
636 vlc_object_t
**pp_decoder
,
637 vout_thread_t
**pp_vout
, audio_output_t
**pp_aout
)
639 return input_Control( p_input
, INPUT_GET_ES_OBJECTS
, i_id
,
640 pp_decoder
, pp_vout
, pp_aout
);
644 * \see input_clock_GetSystemOrigin
646 static inline int input_GetPcrSystem( input_thread_t
*p_input
, mtime_t
*pi_system
, mtime_t
*pi_delay
)
648 return input_Control( p_input
, INPUT_GET_PCR_SYSTEM
, pi_system
, pi_delay
);
651 * \see input_clock_ChangeSystemOrigin
653 static inline int input_ModifyPcrSystem( input_thread_t
*p_input
, bool b_absolute
, mtime_t i_system
)
655 return input_Control( p_input
, INPUT_MODIFY_PCR_SYSTEM
, b_absolute
, i_system
);
659 VLC_API decoder_t
* input_DecoderCreate( vlc_object_t
*, const es_format_t
*, input_resource_t
* ) VLC_USED
;
660 VLC_API
void input_DecoderDelete( decoder_t
* );
661 VLC_API
void input_DecoderDecode( decoder_t
*, block_t
*, bool b_do_pace
);
662 VLC_API
void input_DecoderDrain( decoder_t
* );
663 VLC_API
void input_DecoderFlush( decoder_t
* );
666 * This function creates a sane filename path.
668 VLC_API
char * input_CreateFilename( input_thread_t
*, const char *psz_path
, const char *psz_prefix
, const char *psz_extension
) VLC_USED
;
671 * It creates an empty input resource handler.
673 * The given object MUST stay alive as long as the input_resource_t is
676 VLC_API input_resource_t
* input_resource_New( vlc_object_t
* ) VLC_USED
;
679 * It releases an input resource.
681 VLC_API
void input_resource_Release( input_resource_t
* );
684 * Forcefully destroys the video output (e.g. when the playlist is stopped).
686 VLC_API
void input_resource_TerminateVout( input_resource_t
* );
689 * This function releases all resources (object).
691 VLC_API
void input_resource_Terminate( input_resource_t
* );
694 * \return the current audio output if any.
695 * Use vlc_object_release() to drop the reference.
697 VLC_API audio_output_t
*input_resource_HoldAout( input_resource_t
* );
700 * This function creates or recycles an audio output.
702 VLC_API audio_output_t
*input_resource_GetAout( input_resource_t
* );
705 * This function retains or destroys an audio output.
707 VLC_API
void input_resource_PutAout( input_resource_t
*, audio_output_t
* );
710 * Prevents the existing audio output (if any) from being recycled.
712 VLC_API
void input_resource_ResetAout( input_resource_t
* );