1 /*****************************************************************************
2 * vlc_input.h: Core input structures
3 *****************************************************************************
4 * Copyright (C) 1999-2006 the VideoLAN team
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
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.
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.
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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /* __ is need because conflict with <vlc/input.h> */
31 * This file defines functions, structures and enums for input objects in vlc
37 #include <vlc_events.h>
38 #include <vlc_input_item.h>
42 /*****************************************************************************
44 *****************************************************************************/
45 static inline void vlc_audio_replay_gain_MergeFromMeta( audio_replay_gain_t *p_dst,
46 const vlc_meta_t *p_meta )
48 const char * psz_value;
53 if( (psz_value = vlc_meta_GetExtra(p_meta, "REPLAYGAIN_TRACK_GAIN")) ||
54 (psz_value = vlc_meta_GetExtra(p_meta, "RG_RADIO")) )
56 p_dst->pb_gain[AUDIO_REPLAY_GAIN_TRACK] = true;
57 p_dst->pf_gain[AUDIO_REPLAY_GAIN_TRACK] = atof( psz_value );
59 else if( (psz_value = vlc_meta_GetExtra(p_meta, "REPLAYGAIN_TRACK_PEAK" )) ||
60 (psz_value = vlc_meta_GetExtra(p_meta, "RG_PEAK" )) )
62 p_dst->pb_peak[AUDIO_REPLAY_GAIN_TRACK] = true;
63 p_dst->pf_peak[AUDIO_REPLAY_GAIN_TRACK] = atof( psz_value );
65 else if( (psz_value = vlc_meta_GetExtra(p_meta, "REPLAYGAIN_ALBUM_GAIN" )) ||
66 (psz_value = vlc_meta_GetExtra(p_meta, "RG_AUDIOPHILE" )) )
68 p_dst->pb_gain[AUDIO_REPLAY_GAIN_ALBUM] = true;
69 p_dst->pf_gain[AUDIO_REPLAY_GAIN_ALBUM] = atof( psz_value );
71 else if( (psz_value = vlc_meta_GetExtra(p_meta, "REPLAYGAIN_ALBUM_PEAK" )) )
73 p_dst->pb_peak[AUDIO_REPLAY_GAIN_ALBUM] = true;
74 p_dst->pf_peak[AUDIO_REPLAY_GAIN_ALBUM] = atof( psz_value );
78 /*****************************************************************************
79 * Seek point: (generalisation of chapters)
80 *****************************************************************************/
83 int64_t i_byte_offset;
84 int64_t i_time_offset;
89 static inline seekpoint_t *vlc_seekpoint_New( void )
91 seekpoint_t *point = (seekpoint_t*)malloc( sizeof( seekpoint_t ) );
92 point->i_byte_offset =
93 point->i_time_offset = -1;
95 point->psz_name = NULL;
99 static inline void vlc_seekpoint_Delete( seekpoint_t *point )
102 free( point->psz_name );
106 static inline seekpoint_t *vlc_seekpoint_Duplicate( const seekpoint_t *src )
108 seekpoint_t *point = vlc_seekpoint_New();
109 if( src->psz_name ) point->psz_name = strdup( src->psz_name );
110 point->i_time_offset = src->i_time_offset;
111 point->i_byte_offset = src->i_byte_offset;
115 /*****************************************************************************
117 *****************************************************************************/
122 bool b_menu; /* Is it a menu or a normal entry */
124 int64_t i_length; /* Length(microsecond) if known, else 0 */
125 int64_t i_size; /* Size (bytes) if known, else 0 */
127 /* Title seekpoint */
129 seekpoint_t **seekpoint;
133 static inline input_title_t *vlc_input_title_New(void)
135 input_title_t *t = (input_title_t*)malloc( sizeof( input_title_t ) );
147 static inline void vlc_input_title_Delete( input_title_t *t )
154 for( i = 0; i < t->i_seekpoint; i++ )
156 free( t->seekpoint[i]->psz_name );
157 free( t->seekpoint[i] );
159 free( t->seekpoint );
163 static inline input_title_t *vlc_input_title_Duplicate( const input_title_t *t )
165 input_title_t *dup = vlc_input_title_New( );
168 if( t->psz_name ) dup->psz_name = strdup( t->psz_name );
169 dup->b_menu = t->b_menu;
170 dup->i_length = t->i_length;
171 dup->i_size = t->i_size;
172 dup->i_seekpoint = t->i_seekpoint;
173 if( t->i_seekpoint > 0 )
175 dup->seekpoint = (seekpoint_t**)calloc( t->i_seekpoint,
176 sizeof(seekpoint_t*) );
178 for( i = 0; i < t->i_seekpoint; i++ )
180 dup->seekpoint[i] = vlc_seekpoint_Duplicate( t->seekpoint[i] );
187 /*****************************************************************************
189 *****************************************************************************/
190 struct input_attachment_t
194 char *psz_description;
200 static inline input_attachment_t *vlc_input_attachment_New( const char *psz_name,
201 const char *psz_mime,
202 const char *psz_description,
206 input_attachment_t *a =
207 (input_attachment_t*)malloc( sizeof(input_attachment_t) );
210 a->psz_name = strdup( psz_name ? psz_name : "" );
211 a->psz_mime = strdup( psz_mime ? psz_mime : "" );
212 a->psz_description = strdup( psz_description ? psz_description : "" );
217 a->p_data = malloc( i_data );
218 if( a->p_data && p_data )
219 memcpy( a->p_data, p_data, i_data );
223 static inline input_attachment_t *vlc_input_attachment_Duplicate( const input_attachment_t *a )
225 return vlc_input_attachment_New( a->psz_name, a->psz_mime, a->psz_description,
226 a->p_data, a->i_data );
228 static inline void vlc_input_attachment_Delete( input_attachment_t *a )
234 free( a->psz_description );
239 /*****************************************************************************
240 * input defines/constants.
241 *****************************************************************************/
243 /* i_update field of access_t/demux_t */
244 #define INPUT_UPDATE_NONE 0x0000
245 #define INPUT_UPDATE_SIZE 0x0001
246 #define INPUT_UPDATE_TITLE 0x0010
247 #define INPUT_UPDATE_SEEKPOINT 0x0020
248 #define INPUT_UPDATE_META 0x0040
249 #define INPUT_UPDATE_SIGNAL 0x0080
252 * This defines private core storage for an input.
254 typedef struct input_thread_private_t input_thread_private_t;
257 * This defines an opaque input resource handler.
259 typedef struct input_resource_t input_resource_t;
262 * Main structure representing an input thread. This structure is mostly
263 * private. The only public fields are READ-ONLY. You must use the helpers
266 struct input_thread_t
275 /* All other data is input_thread is PRIVATE. You can't access it
276 * outside of src/input */
277 input_thread_private_t *p;
281 * Record prefix string.
282 * TODO make it configurable.
284 #define INPUT_RECORD_PREFIX "vlc-record-%Y-%m-%d-%Hh%Mm%Ss-$ N-$ p"
286 /*****************************************************************************
287 * Input events and variables
288 *****************************************************************************/
291 * \defgroup inputvariable Input variables
293 * The input provides multiples variable you can write to and/or read from.
295 * TODO complete the documentation.
296 * The read only variables are:
298 * - "can-seek" (if you can seek, it doesn't say if 'bar display' has be shown
299 * or not, for that check position != 0.0)
303 * - "can-record" (if a stream can be recorded while playing)
304 * - "teletext-es" (list of id from the spu tracks (spu-es) that are teletext, the
305 * variable value being the one currently selected, -1 if no teletext)
307 * - "signal-strength"
308 * - "program-scrambled" (if the current program is scrambled)
309 * - "cache" (level of data cached [0 .. 1])
311 * The read-write variables are:
312 * - state (\see input_state_e)
313 * - rate, rate-slower, rate-faster
314 * - position, position-offset
315 * - time, time-offset
316 * - title, next-title, prev-title
317 * - chapter, next-chapter, next-chapter-prev
318 * - program, audio-es, video-es, spu-es
319 * - audio-delay, spu-delay
320 * - bookmark (bookmark list)
323 * - navigation (list of "title %2i")
326 * The variable used for event is
327 * - intf-event (\see input_event_type_e)
333 * This enum is used by the variable "state"
335 typedef enum input_state_e
348 * It is an float used by the variable "rate" in the
349 * range [INPUT_RATE_DEFAULT/INPUT_RATE_MAX, INPUT_RATE_DEFAULT/INPUT_RATE_MAX]
350 * the default value being 1. It represents the ratio of playback speed to
351 * nominal speed (bigger is faster).
353 * Internally, the rate is stored as a value in the range
354 * [INPUT_RATE_MIN, INPUT_RATE_MAX].
355 * internal rate = INPUT_RATE_DEFAULT / rate variable
361 #define INPUT_RATE_DEFAULT 1000
365 #define INPUT_RATE_MIN 32 /* Up to 32/1 */
369 #define INPUT_RATE_MAX 32000 /* Up to 1/32 */
374 * You can catch input event by adding a callback on the variable "intf-event".
375 * This variable is an integer that will hold a input_event_type_e value.
377 typedef enum input_event_type_e
379 /* "state" has changed */
383 /* a *user* abort has been requested */
386 /* "rate" has changed */
389 /* At least one of "position" or "time" */
390 INPUT_EVENT_POSITION,
392 /* "length" has changed */
395 /* A title has been added or removed or selected.
396 * It imply that chapter has changed (not chapter event is sent) */
398 /* A chapter has been added or removed or selected. */
401 /* A program ("program") has been added or removed or selected,
402 * or "program-scrambled" has changed.*/
404 /* A ES has been added or removed or selected */
406 /* "teletext-es" has changed */
407 INPUT_EVENT_TELETEXT,
409 /* "record" has changed */
412 /* input_item_t media has changed */
413 INPUT_EVENT_ITEM_META,
414 /* input_item_t info has changed */
415 INPUT_EVENT_ITEM_INFO,
416 /* input_item_t name has changed */
417 INPUT_EVENT_ITEM_NAME,
418 /* input_item_t epg has changed */
419 INPUT_EVENT_ITEM_EPG,
421 /* Input statistics have been updated */
422 INPUT_EVENT_STATISTICS,
423 /* At least one of "signal-quality" or "signal-strength" has changed */
426 /* "audio-delay" has changed */
427 INPUT_EVENT_AUDIO_DELAY,
428 /* "spu-delay" has changed */
429 INPUT_EVENT_SUBTITLE_DELAY,
431 /* "bookmark" has changed */
432 INPUT_EVENT_BOOKMARK,
434 /* cache" has changed */
437 /* A aout_instance_t object has been created/deleted by *the input* */
439 /* A vout_thread_t object has been created/deleted by *the input* */
442 } input_event_type_e;
449 /* input variable "position" */
450 INPUT_GET_POSITION, /* arg1= double * res= */
451 INPUT_SET_POSITION, /* arg1= double res=can fail */
453 /* input variable "length" */
454 INPUT_GET_LENGTH, /* arg1= int64_t * res=can fail */
456 /* input variable "time" */
457 INPUT_GET_TIME, /* arg1= int64_t * res= */
458 INPUT_SET_TIME, /* arg1= int64_t res=can fail */
460 /* input variable "rate" (nominal is INPUT_RATE_DEFAULT) */
461 INPUT_GET_RATE, /* arg1= int * res= */
462 INPUT_SET_RATE, /* arg1= int res=can fail */
464 /* input variable "state" */
465 INPUT_GET_STATE, /* arg1= int * res= */
466 INPUT_SET_STATE, /* arg1= int res=can fail */
468 /* input variable "audio-delay" and "sub-delay" */
469 INPUT_GET_AUDIO_DELAY, /* arg1 = int* res=can fail */
470 INPUT_SET_AUDIO_DELAY, /* arg1 = int res=can fail */
471 INPUT_GET_SPU_DELAY, /* arg1 = int* res=can fail */
472 INPUT_SET_SPU_DELAY, /* arg1 = int res=can fail */
475 INPUT_ADD_INFO, /* arg1= char* arg2= char* arg3=... res=can fail */
476 INPUT_REPLACE_INFOS,/* arg1= info_category_t * res=cannot fail */
477 INPUT_MERGE_INFOS,/* arg1= info_category_t * res=cannot fail */
478 INPUT_GET_INFO, /* arg1= char* arg2= char* arg3= char** res=can fail */
479 INPUT_DEL_INFO, /* arg1= char* arg2= char* res=can fail */
480 INPUT_SET_NAME, /* arg1= char* res=can fail */
482 /* Input config options */
483 INPUT_ADD_OPTION, /* arg1= char * arg2= char * res=can fail*/
485 /* Input properties */
486 INPUT_GET_VIDEO_FPS, /* arg1= double * res=can fail */
489 INPUT_GET_BOOKMARK, /* arg1= seekpoint_t * res=can fail */
490 INPUT_GET_BOOKMARKS, /* arg1= seekpoint_t *** arg2= int * res=can fail */
491 INPUT_CLEAR_BOOKMARKS, /* res=can fail */
492 INPUT_ADD_BOOKMARK, /* arg1= seekpoint_t * res=can fail */
493 INPUT_CHANGE_BOOKMARK, /* arg1= seekpoint_t * arg2= int * res=can fail */
494 INPUT_DEL_BOOKMARK, /* arg1= seekpoint_t * res=can fail */
495 INPUT_SET_BOOKMARK, /* arg1= int res=can fail */
498 INPUT_GET_ATTACHMENTS, /* arg1=input_attachment_t***, arg2=int* res=can fail */
499 INPUT_GET_ATTACHMENT, /* arg1=input_attachment_t**, arg2=char* res=can fail */
501 /* On the fly input slave */
502 INPUT_ADD_SLAVE, /* arg1= const char * */
503 INPUT_ADD_SUBTITLE, /* arg1= const char *, arg2=bool b_check_extension */
505 /* On the fly record while playing */
506 INPUT_SET_RECORD_STATE, /* arg1=bool res=can fail */
507 INPUT_GET_RECORD_STATE, /* arg1=bool* res=can fail */
510 INPUT_RESTART_ES, /* arg1=int (-AUDIO/VIDEO/SPU_ES for the whole category) */
513 * XXX You must call vlc_object_release as soon as possible */
514 INPUT_GET_AOUT, /* arg1=aout_instance_t ** res=can fail */
515 INPUT_GET_VOUTS, /* arg1=vout_thread_t ***, size_t * res=can fail */
516 INPUT_GET_ES_OBJECTS, /* arg1=int id, vlc_object_t **dec, vout_thread_t **, aout_instance_t ** */
518 /* External clock managments */
519 INPUT_GET_PCR_SYSTEM, /* arg1=mtime_t *, arg2=mtime_t * res=can fail */
520 INPUT_MODIFY_PCR_SYSTEM,/* arg1=int absolute, arg2=mtime_t res=can fail */
525 /*****************************************************************************
527 *****************************************************************************/
529 VLC_EXPORT( input_thread_t *, input_Create, ( vlc_object_t *p_parent, input_item_t *, const char *psz_log, input_resource_t * ) LIBVLC_USED );
530 #define input_Create(a,b,c,d) input_Create(VLC_OBJECT(a),b,c,d)
532 VLC_EXPORT( input_thread_t *, input_CreateAndStart, ( vlc_object_t *p_parent, input_item_t *, const char *psz_log ) LIBVLC_USED );
533 #define input_CreateAndStart(a,b,c) input_CreateAndStart(VLC_OBJECT(a),b,c)
535 VLC_EXPORT( int, input_Start, ( input_thread_t * ) );
537 VLC_EXPORT( void, input_Stop, ( input_thread_t *, bool b_abort ) );
539 VLC_EXPORT( int, input_Read, ( vlc_object_t *, input_item_t * ) );
540 #define input_Read(a,b) input_Read(VLC_OBJECT(a),b)
542 VLC_EXPORT( int, input_vaControl,( input_thread_t *, int i_query, va_list ) );
544 VLC_EXPORT( int, input_Control, ( input_thread_t *, int i_query, ... ) );
547 * Get the input item for an input thread
549 * You have to keep a reference to the input or to the input_item_t until
550 * you do not need it anymore.
552 VLC_EXPORT( input_item_t*, input_GetItem, ( input_thread_t * ) LIBVLC_USED );
555 * It will return the current state of the input.
556 * Provided for convenience.
558 static inline input_state_e input_GetState( input_thread_t * p_input )
560 input_state_e state = INIT_S;
561 input_Control( p_input, INPUT_GET_STATE, &state );
565 * It will add a new subtitle source to the input.
566 * Provided for convenience.
568 static inline int input_AddSubtitle( input_thread_t *p_input, const char *psz_url, bool b_check_extension )
570 return input_Control( p_input, INPUT_ADD_SUBTITLE, psz_url, b_check_extension );
574 * Return one of the video output (if any). If possible, you should use
575 * INPUT_GET_VOUTS directly and process _all_ video outputs instead.
576 * @param p_input an input thread from which to get a video output
577 * @return NULL on error, or a video output thread pointer (which needs to be
578 * released with vlc_object_release()).
580 static inline vout_thread_t *input_GetVout( input_thread_t *p_input )
582 vout_thread_t **pp_vout, *p_vout;
585 if( input_Control( p_input, INPUT_GET_VOUTS, &pp_vout, &i_vout ) )
588 for( size_t i = 1; i < i_vout; i++ )
589 vlc_object_release( (vlc_object_t *)(pp_vout[i]) );
591 p_vout = (i_vout >= 1) ? pp_vout[0] : NULL;
597 * Return the audio output (if any) associated with an input.
598 * @param p_input an input thread
599 * @return NULL on error, or the audio output (which needs to be
600 * released with vlc_object_release()).
602 static inline aout_instance_t *input_GetAout( input_thread_t *p_input )
604 aout_instance_t *p_aout;
605 return input_Control( p_input, INPUT_GET_AOUT, &p_aout ) ? NULL : p_aout;
609 * Returns the objects associated to an ES.
611 * You must release all non NULL object using vlc_object_release.
612 * You may set pointer of pointer to NULL to avoid retreiving it.
614 static inline int input_GetEsObjects( input_thread_t *p_input, int i_id,
615 vlc_object_t **pp_decoder,
616 vout_thread_t **pp_vout, aout_instance_t **pp_aout )
618 return input_Control( p_input, INPUT_GET_ES_OBJECTS, i_id,
619 pp_decoder, pp_vout, pp_aout );
623 * \see input_clock_GetSystemOrigin
625 static inline int input_GetPcrSystem( input_thread_t *p_input, mtime_t *pi_system, mtime_t *pi_delay )
627 return input_Control( p_input, INPUT_GET_PCR_SYSTEM, pi_system, pi_delay );
630 * \see input_clock_ChangeSystemOrigin
632 static inline int input_ModifyPcrSystem( input_thread_t *p_input, bool b_absolute, mtime_t i_system )
634 return input_Control( p_input, INPUT_MODIFY_PCR_SYSTEM, b_absolute, i_system );
638 typedef struct input_clock_t input_clock_t;
639 VLC_EXPORT( decoder_t *, input_DecoderNew, ( input_thread_t *, es_format_t *, input_clock_t *, sout_instance_t * ) LIBVLC_USED );
640 VLC_EXPORT( void, input_DecoderDelete, ( decoder_t * ) );
641 VLC_EXPORT( void, input_DecoderDecode,( decoder_t *, block_t *, bool b_do_pace ) );
644 * This function allows to split a MRL into access, demux and path part.
646 * You should not write into access and demux string as they may not point into
647 * the provided buffer.
648 * The buffer provided by psz_dup will be modified.
650 VLC_EXPORT( void, input_SplitMRL, ( const char **ppsz_access, const char **ppsz_demux, char **ppsz_path, char *psz_dup ) );
653 * This function creates a sane filename path.
655 VLC_EXPORT( char *, input_CreateFilename, ( vlc_object_t *, const char *psz_path, const char *psz_prefix, const char *psz_extension ) LIBVLC_USED );
658 * It creates an empty input resource handler.
660 * The given object MUST stay alive as long as the input_resource_t is
663 VLC_EXPORT( input_resource_t *, input_resource_New, ( vlc_object_t * ) LIBVLC_USED );
666 * It releases an input resource.
668 VLC_EXPORT(void, input_resource_Release, ( input_resource_t * ) );
671 * Forcefully destroys the video output (e.g. when the playlist is stopped).
673 VLC_EXPORT(void, input_resource_TerminateVout, ( input_resource_t * ) );
676 * This function releases all resources (object).
678 VLC_EXPORT( void, input_resource_Terminate, ( input_resource_t * ) );