704 lines
22 KiB
C
704 lines
22 KiB
C
/*****************************************************************************
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* vlc_input.h: Core input structures
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*****************************************************************************
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* Copyright (C) 1999-2015 VLC authors and VideoLAN
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* $Id: d20585ba33030980fa496cd042227b543f10827a $
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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* Laurent Aimar <fenrir@via.ecp.fr>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifndef VLC_INPUT_H
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#define VLC_INPUT_H 1
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/**
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* \defgroup input Input
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* Input thread
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* @{
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* \file
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* Input thread interface
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*/
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#include <vlc_es.h>
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#include <vlc_meta.h>
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#include <vlc_epg.h>
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#include <vlc_events.h>
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#include <vlc_input_item.h>
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#include <vlc_vout.h>
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#include <vlc_vout_osd.h>
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#include <string.h>
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/*****************************************************************************
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* Seek point: (generalisation of chapters)
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*****************************************************************************/
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struct seekpoint_t
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{
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int64_t i_time_offset;
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char *psz_name;
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};
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static inline seekpoint_t *vlc_seekpoint_New( void )
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{
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seekpoint_t *point = (seekpoint_t*)malloc( sizeof( seekpoint_t ) );
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if( !point )
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return NULL;
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point->i_time_offset = -1;
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point->psz_name = NULL;
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return point;
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}
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static inline void vlc_seekpoint_Delete( seekpoint_t *point )
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{
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if( !point ) return;
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free( point->psz_name );
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free( point );
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}
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static inline seekpoint_t *vlc_seekpoint_Duplicate( const seekpoint_t *src )
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{
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seekpoint_t *point = vlc_seekpoint_New();
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if( likely(point) )
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{
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if( src->psz_name ) point->psz_name = strdup( src->psz_name );
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point->i_time_offset = src->i_time_offset;
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}
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return point;
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}
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/*****************************************************************************
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* Title:
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*****************************************************************************/
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/* input_title_t.i_flags field */
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#define INPUT_TITLE_MENU 0x01 /* Menu title */
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#define INPUT_TITLE_INTERACTIVE 0x02 /* Interactive title. Playback position has no meaning. */
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typedef struct input_title_t
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{
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char *psz_name;
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int64_t i_length; /* Length(microsecond) if known, else 0 */
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unsigned i_flags; /* Is it a menu or a normal entry */
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/* Title seekpoint */
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int i_seekpoint;
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seekpoint_t **seekpoint;
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} input_title_t;
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static inline input_title_t *vlc_input_title_New(void)
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{
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input_title_t *t = (input_title_t*)malloc( sizeof( input_title_t ) );
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if( !t )
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return NULL;
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t->psz_name = NULL;
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t->i_flags = 0;
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t->i_length = 0;
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t->i_seekpoint = 0;
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t->seekpoint = NULL;
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return t;
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}
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static inline void vlc_input_title_Delete( input_title_t *t )
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{
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int i;
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if( t == NULL )
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return;
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free( t->psz_name );
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for( i = 0; i < t->i_seekpoint; i++ )
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vlc_seekpoint_Delete( t->seekpoint[i] );
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free( t->seekpoint );
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free( t );
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}
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static inline input_title_t *vlc_input_title_Duplicate( const input_title_t *t )
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{
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input_title_t *dup = vlc_input_title_New( );
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if( dup == NULL) return NULL;
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if( t->psz_name ) dup->psz_name = strdup( t->psz_name );
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dup->i_flags = t->i_flags;
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dup->i_length = t->i_length;
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if( t->i_seekpoint > 0 )
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{
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dup->seekpoint = (seekpoint_t**)vlc_alloc( t->i_seekpoint, sizeof(seekpoint_t*) );
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if( likely(dup->seekpoint) )
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{
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for( int i = 0; i < t->i_seekpoint; i++ )
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dup->seekpoint[i] = vlc_seekpoint_Duplicate( t->seekpoint[i] );
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dup->i_seekpoint = t->i_seekpoint;
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}
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}
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return dup;
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}
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/*****************************************************************************
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* Attachments
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*****************************************************************************/
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struct input_attachment_t
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{
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char *psz_name;
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char *psz_mime;
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char *psz_description;
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size_t i_data;
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void *p_data;
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};
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static inline void vlc_input_attachment_Delete( input_attachment_t *a )
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{
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if( !a )
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return;
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free( a->p_data );
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free( a->psz_description );
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free( a->psz_mime );
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free( a->psz_name );
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free( a );
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}
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static inline input_attachment_t *vlc_input_attachment_New( const char *psz_name,
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const char *psz_mime,
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const char *psz_description,
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const void *p_data,
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size_t i_data )
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{
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input_attachment_t *a = (input_attachment_t *)malloc( sizeof (*a) );
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if( unlikely(a == NULL) )
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return NULL;
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a->psz_name = strdup( psz_name ? psz_name : "" );
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a->psz_mime = strdup( psz_mime ? psz_mime : "" );
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a->psz_description = strdup( psz_description ? psz_description : "" );
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a->i_data = i_data;
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a->p_data = malloc( i_data );
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if( i_data > 0 && likely(a->p_data != NULL) )
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memcpy( a->p_data, p_data, i_data );
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if( unlikely(a->psz_name == NULL || a->psz_mime == NULL
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|| a->psz_description == NULL || (i_data > 0 && a->p_data == NULL)) )
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{
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vlc_input_attachment_Delete( a );
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a = NULL;
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}
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return a;
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}
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static inline input_attachment_t *vlc_input_attachment_Duplicate( const input_attachment_t *a )
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{
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return vlc_input_attachment_New( a->psz_name, a->psz_mime, a->psz_description,
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a->p_data, a->i_data );
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}
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/*****************************************************************************
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* input defines/constants.
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*****************************************************************************/
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/**
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* This defines an opaque input resource handler.
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*/
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typedef struct input_resource_t input_resource_t;
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/**
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* Main structure representing an input thread. This structure is mostly
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* private. The only public fields are read-only and constant.
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*/
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struct input_thread_t
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{
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VLC_COMMON_MEMBERS
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};
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/**
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* Record prefix string.
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* TODO make it configurable.
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*/
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#define INPUT_RECORD_PREFIX "vlc-record-%Y-%m-%d-%Hh%Mm%Ss-$ N-$ p"
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/*****************************************************************************
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* Input events and variables
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*****************************************************************************/
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/**
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* \defgroup inputvariable Input variables
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*
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* The input provides multiples variable you can write to and/or read from.
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*
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* TODO complete the documentation.
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* The read only variables are:
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* - "length"
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* - "can-seek" (if you can seek, it doesn't say if 'bar display' has be shown
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* or not, for that check position != 0.0)
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* - "can-pause"
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* - "can-rate"
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* - "can-rewind"
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* - "can-record" (if a stream can be recorded while playing)
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* - "teletext-es" (list of id from the spu tracks (spu-es) that are teletext, the
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* variable value being the one currently selected, -1 if no teletext)
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* - "signal-quality"
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* - "signal-strength"
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* - "program-scrambled" (if the current program is scrambled)
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* - "cache" (level of data cached [0 .. 1])
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*
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* The read-write variables are:
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* - state (\see input_state_e)
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* - rate
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* - position
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* - time, time-offset
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* - title, next-title, prev-title
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* - chapter, next-chapter, next-chapter-prev
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* - program, audio-es, video-es, spu-es
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* - audio-delay, spu-delay
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* - bookmark (bookmark list)
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* - record
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* - frame-next
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* - navigation (list of "title %2i")
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* - "title %2i"
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*
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* The variable used for event is
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* - intf-event (\see input_event_type_e)
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*/
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/**
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* Input state
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*
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* This enum is used by the variable "state"
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*/
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typedef enum input_state_e
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{
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INIT_S = 0,
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OPENING_S,
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PLAYING_S,
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PAUSE_S,
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END_S,
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ERROR_S,
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} input_state_e;
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/**
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* Input rate.
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*
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* It is an float used by the variable "rate" in the
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* range [INPUT_RATE_DEFAULT/INPUT_RATE_MAX, INPUT_RATE_DEFAULT/INPUT_RATE_MIN]
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* the default value being 1. It represents the ratio of playback speed to
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* nominal speed (bigger is faster).
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*
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* Internally, the rate is stored as a value in the range
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* [INPUT_RATE_MIN, INPUT_RATE_MAX].
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* internal rate = INPUT_RATE_DEFAULT / rate variable
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*/
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/**
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* Default rate value
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*/
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#define INPUT_RATE_DEFAULT 1000
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/**
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* Minimal rate value
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*/
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#define INPUT_RATE_MIN 32 /* Up to 32/1 */
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/**
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* Maximal rate value
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*/
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#define INPUT_RATE_MAX 32000 /* Up to 1/32 */
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/**
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* Input events
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*
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* You can catch input event by adding a callback on the variable "intf-event".
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* This variable is an integer that will hold a input_event_type_e value.
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*/
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typedef enum input_event_type_e
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{
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/* "state" has changed */
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INPUT_EVENT_STATE,
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/* b_dead is true */
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INPUT_EVENT_DEAD,
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/* "rate" has changed */
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INPUT_EVENT_RATE,
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/* At least one of "position" or "time" */
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INPUT_EVENT_POSITION,
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/* "length" has changed */
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INPUT_EVENT_LENGTH,
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/* A title has been added or removed or selected.
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* It implies that the chapter has changed (no chapter event is sent) */
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INPUT_EVENT_TITLE,
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/* A chapter has been added or removed or selected. */
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INPUT_EVENT_CHAPTER,
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/* A program ("program") has been added or removed or selected,
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* or "program-scrambled" has changed.*/
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INPUT_EVENT_PROGRAM,
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/* A ES has been added or removed or selected */
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INPUT_EVENT_ES,
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/* "teletext-es" has changed */
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INPUT_EVENT_TELETEXT,
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/* "record" has changed */
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INPUT_EVENT_RECORD,
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/* input_item_t media has changed */
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INPUT_EVENT_ITEM_META,
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/* input_item_t info has changed */
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INPUT_EVENT_ITEM_INFO,
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/* input_item_t epg has changed */
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INPUT_EVENT_ITEM_EPG,
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/* Input statistics have been updated */
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INPUT_EVENT_STATISTICS,
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/* At least one of "signal-quality" or "signal-strength" has changed */
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INPUT_EVENT_SIGNAL,
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/* "audio-delay" has changed */
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INPUT_EVENT_AUDIO_DELAY,
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/* "spu-delay" has changed */
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INPUT_EVENT_SUBTITLE_DELAY,
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/* "bookmark" has changed */
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INPUT_EVENT_BOOKMARK,
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/* cache" has changed */
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INPUT_EVENT_CACHE,
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/* A audio_output_t object has been created/deleted by *the input* */
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INPUT_EVENT_AOUT,
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/* A vout_thread_t object has been created/deleted by *the input* */
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INPUT_EVENT_VOUT,
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} input_event_type_e;
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/**
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* Input queries
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*/
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enum input_query_e
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{
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/* input variable "position" */
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INPUT_GET_POSITION, /* arg1= double * res= */
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INPUT_SET_POSITION, /* arg1= double res=can fail */
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/* input variable "length" */
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INPUT_GET_LENGTH, /* arg1= int64_t * res=can fail */
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/* input variable "time" */
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INPUT_GET_TIME, /* arg1= int64_t * res= */
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INPUT_SET_TIME, /* arg1= int64_t res=can fail */
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/* input variable "rate" (nominal is INPUT_RATE_DEFAULT) */
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INPUT_GET_RATE, /* arg1= int * res= */
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INPUT_SET_RATE, /* arg1= int res=can fail */
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/* input variable "state" */
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INPUT_GET_STATE, /* arg1= int * res= */
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INPUT_SET_STATE, /* arg1= int res=can fail */
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/* input variable "audio-delay" and "sub-delay" */
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INPUT_GET_AUDIO_DELAY, /* arg1 = int* res=can fail */
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INPUT_SET_AUDIO_DELAY, /* arg1 = int res=can fail */
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INPUT_GET_SPU_DELAY, /* arg1 = int* res=can fail */
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INPUT_SET_SPU_DELAY, /* arg1 = int res=can fail */
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/* Menu (VCD/DVD/BD) Navigation */
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/** Activate the navigation item selected. res=can fail */
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INPUT_NAV_ACTIVATE,
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/** Use the up arrow to select a navigation item above. res=can fail */
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INPUT_NAV_UP,
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/** Use the down arrow to select a navigation item under. res=can fail */
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INPUT_NAV_DOWN,
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/** Use the left arrow to select a navigation item on the left. res=can fail */
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INPUT_NAV_LEFT,
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/** Use the right arrow to select a navigation item on the right. res=can fail */
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INPUT_NAV_RIGHT,
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/** Activate the popup Menu (for BD). res=can fail */
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INPUT_NAV_POPUP,
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/** Activate disc Root Menu. res=can fail */
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INPUT_NAV_MENU,
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/* Meta datas */
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INPUT_ADD_INFO, /* arg1= char* arg2= char* arg3=... res=can fail */
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INPUT_REPLACE_INFOS,/* arg1= info_category_t * res=cannot fail */
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INPUT_MERGE_INFOS,/* arg1= info_category_t * res=cannot fail */
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INPUT_DEL_INFO, /* arg1= char* arg2= char* res=can fail */
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/* bookmarks */
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INPUT_GET_BOOKMARK, /* arg1= seekpoint_t * res=can fail */
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INPUT_GET_BOOKMARKS, /* arg1= seekpoint_t *** arg2= int * res=can fail */
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INPUT_CLEAR_BOOKMARKS, /* res=can fail */
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INPUT_ADD_BOOKMARK, /* arg1= seekpoint_t * res=can fail */
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INPUT_CHANGE_BOOKMARK, /* arg1= seekpoint_t * arg2= int * res=can fail */
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INPUT_DEL_BOOKMARK, /* arg1= seekpoint_t * res=can fail */
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INPUT_SET_BOOKMARK, /* arg1= int res=can fail */
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/* titles */
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INPUT_GET_TITLE_INFO, /* arg1=input_title_t** arg2= int * res=can fail */
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INPUT_GET_FULL_TITLE_INFO, /* arg1=input_title_t*** arg2= int * res=can fail */
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/* seekpoints */
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INPUT_GET_SEEKPOINTS, /* arg1=seekpoint_t*** arg2= int * res=can fail */
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/* Attachments */
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INPUT_GET_ATTACHMENTS, /* arg1=input_attachment_t***, arg2=int* res=can fail */
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INPUT_GET_ATTACHMENT, /* arg1=input_attachment_t**, arg2=char* res=can fail */
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/* On the fly input slave */
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INPUT_ADD_SLAVE, /* arg1= enum slave_type, arg2= const char *,
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* arg3= bool forced, arg4= bool notify,
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* arg5= bool check_extension */
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/* On the fly record while playing */
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INPUT_SET_RECORD_STATE, /* arg1=bool res=can fail */
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INPUT_GET_RECORD_STATE, /* arg1=bool* res=can fail */
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/* ES */
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INPUT_RESTART_ES, /* arg1=int (-AUDIO/VIDEO/SPU_ES for the whole category) */
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/* Viewpoint */
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INPUT_UPDATE_VIEWPOINT, /* arg1=(const vlc_viewpoint_t*), arg2=bool b_absolute */
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INPUT_SET_INITIAL_VIEWPOINT, /* arg1=(const vlc_viewpoint_t*) */
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/* Input ressources
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* XXX You must call vlc_object_release as soon as possible */
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INPUT_GET_AOUT, /* arg1=audio_output_t ** res=can fail */
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INPUT_GET_VOUTS, /* arg1=vout_thread_t ***, size_t * res=can fail */
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INPUT_GET_ES_OBJECTS, /* arg1=int id, vlc_object_t **dec, vout_thread_t **, audio_output_t ** */
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/* Renderers */
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INPUT_SET_RENDERER, /* arg1=vlc_renderer_item_t* */
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/* External clock managments */
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INPUT_GET_PCR_SYSTEM, /* arg1=mtime_t *, arg2=mtime_t * res=can fail */
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INPUT_MODIFY_PCR_SYSTEM,/* arg1=int absolute, arg2=mtime_t res=can fail */
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};
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/** @}*/
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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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VLC_API input_thread_t * input_Create( vlc_object_t *p_parent, input_item_t *,
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const char *psz_log, input_resource_t *,
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vlc_renderer_item_t* p_renderer ) VLC_USED;
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#define input_Create(a,b,c,d,e) input_Create(VLC_OBJECT(a),b,c,d,e)
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VLC_API int input_Start( input_thread_t * );
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VLC_API void input_Stop( input_thread_t * );
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VLC_API int input_Read( vlc_object_t *, input_item_t * );
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#define input_Read(a,b) input_Read(VLC_OBJECT(a),b)
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VLC_API int input_vaControl( input_thread_t *, int i_query, va_list );
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VLC_API int input_Control( input_thread_t *, int i_query, ... );
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VLC_API void input_Close( input_thread_t * );
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/**
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* Create a new input_thread_t and start it.
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*
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* Provided for convenience.
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*
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* \see input_Create
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*/
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static inline
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input_thread_t *input_CreateAndStart( vlc_object_t *parent,
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input_item_t *item, const char *log )
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{
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input_thread_t *input = input_Create( parent, item, log, NULL, NULL );
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if( input != NULL && input_Start( input ) )
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{
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vlc_object_release( input );
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input = NULL;
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}
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return input;
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}
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#define input_CreateAndStart(a,b,c) input_CreateAndStart(VLC_OBJECT(a),b,c)
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/**
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* Get the input item for an input thread
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*
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* You have to keep a reference to the input or to the input_item_t until
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* you do not need it anymore.
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*/
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VLC_API input_item_t* input_GetItem( input_thread_t * ) VLC_USED;
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/**
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* It will return the current state of the input.
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* Provided for convenience.
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*/
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static inline input_state_e input_GetState( input_thread_t * p_input )
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{
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input_state_e state = INIT_S;
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input_Control( p_input, INPUT_GET_STATE, &state );
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return state;
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}
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/**
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* Return one of the video output (if any). If possible, you should use
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* INPUT_GET_VOUTS directly and process _all_ video outputs instead.
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* @param p_input an input thread from which to get a video output
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* @return NULL on error, or a video output thread pointer (which needs to be
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* released with vlc_object_release()).
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*/
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static inline vout_thread_t *input_GetVout( input_thread_t *p_input )
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{
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vout_thread_t **pp_vout, *p_vout;
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size_t i_vout;
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if( input_Control( p_input, INPUT_GET_VOUTS, &pp_vout, &i_vout ) )
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return NULL;
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for( size_t i = 1; i < i_vout; i++ )
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vlc_object_release( (vlc_object_t *)(pp_vout[i]) );
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p_vout = (i_vout >= 1) ? pp_vout[0] : NULL;
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free( pp_vout );
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return p_vout;
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}
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static inline int input_AddSlave( input_thread_t *p_input, enum slave_type type,
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const char *psz_uri, bool b_forced,
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bool b_notify, bool b_check_ext )
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{
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return input_Control( p_input, INPUT_ADD_SLAVE, type, psz_uri, b_forced,
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b_notify, b_check_ext );
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}
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/**
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* Update the viewpoint of the input thread. The viewpoint will be applied to
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* all vouts and aouts.
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*
|
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* @param p_input an input thread
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* @param p_viewpoint the viewpoint value
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|
* @param b_absolute if true replace the old viewpoint with the new one. If
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|
* false, increase/decrease it.
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* @return VLC_SUCCESS or a VLC error code
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*/
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static inline int input_UpdateViewpoint( input_thread_t *p_input,
|
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const vlc_viewpoint_t *p_viewpoint,
|
|
bool b_absolute )
|
|
{
|
|
return input_Control( p_input, INPUT_UPDATE_VIEWPOINT, p_viewpoint,
|
|
b_absolute );
|
|
}
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|
|
/**
|
|
* Return the audio output (if any) associated with an input.
|
|
* @param p_input an input thread
|
|
* @return NULL on error, or the audio output (which needs to be
|
|
* released with vlc_object_release()).
|
|
*/
|
|
static inline audio_output_t *input_GetAout( input_thread_t *p_input )
|
|
{
|
|
audio_output_t *p_aout;
|
|
return input_Control( p_input, INPUT_GET_AOUT, &p_aout ) ? NULL : p_aout;
|
|
}
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|
|
|
/**
|
|
* Returns the objects associated to an ES.
|
|
*
|
|
* You must release all non NULL object using vlc_object_release.
|
|
* You may set pointer of pointer to NULL to avoid retreiving it.
|
|
*/
|
|
static inline int input_GetEsObjects( input_thread_t *p_input, int i_id,
|
|
vlc_object_t **pp_decoder,
|
|
vout_thread_t **pp_vout, audio_output_t **pp_aout )
|
|
{
|
|
return input_Control( p_input, INPUT_GET_ES_OBJECTS, i_id,
|
|
pp_decoder, pp_vout, pp_aout );
|
|
}
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|
|
|
/**
|
|
* \see input_clock_GetSystemOrigin
|
|
*/
|
|
static inline int input_GetPcrSystem( input_thread_t *p_input, mtime_t *pi_system, mtime_t *pi_delay )
|
|
{
|
|
return input_Control( p_input, INPUT_GET_PCR_SYSTEM, pi_system, pi_delay );
|
|
}
|
|
/**
|
|
* \see input_clock_ChangeSystemOrigin
|
|
*/
|
|
static inline int input_ModifyPcrSystem( input_thread_t *p_input, bool b_absolute, mtime_t i_system )
|
|
{
|
|
return input_Control( p_input, INPUT_MODIFY_PCR_SYSTEM, b_absolute, i_system );
|
|
}
|
|
|
|
/* */
|
|
VLC_API decoder_t * input_DecoderCreate( vlc_object_t *, const es_format_t *, input_resource_t * ) VLC_USED;
|
|
VLC_API void input_DecoderDelete( decoder_t * );
|
|
VLC_API void input_DecoderDecode( decoder_t *, block_t *, bool b_do_pace );
|
|
VLC_API void input_DecoderDrain( decoder_t * );
|
|
VLC_API void input_DecoderFlush( decoder_t * );
|
|
|
|
/**
|
|
* This function creates a sane filename path.
|
|
*/
|
|
VLC_API char * input_CreateFilename( input_thread_t *, const char *psz_path, const char *psz_prefix, const char *psz_extension ) VLC_USED;
|
|
|
|
/**
|
|
* It creates an empty input resource handler.
|
|
*
|
|
* The given object MUST stay alive as long as the input_resource_t is
|
|
* not deleted.
|
|
*/
|
|
VLC_API input_resource_t * input_resource_New( vlc_object_t * ) VLC_USED;
|
|
|
|
/**
|
|
* It releases an input resource.
|
|
*/
|
|
VLC_API void input_resource_Release( input_resource_t * );
|
|
|
|
/**
|
|
* Forcefully destroys the video output (e.g. when the playlist is stopped).
|
|
*/
|
|
VLC_API void input_resource_TerminateVout( input_resource_t * );
|
|
|
|
/**
|
|
* This function releases all resources (object).
|
|
*/
|
|
VLC_API void input_resource_Terminate( input_resource_t * );
|
|
|
|
/**
|
|
* \return the current audio output if any.
|
|
* Use vlc_object_release() to drop the reference.
|
|
*/
|
|
VLC_API audio_output_t *input_resource_HoldAout( input_resource_t * );
|
|
|
|
/**
|
|
* This function creates or recycles an audio output.
|
|
*/
|
|
VLC_API audio_output_t *input_resource_GetAout( input_resource_t * );
|
|
|
|
/**
|
|
* This function retains or destroys an audio output.
|
|
*/
|
|
VLC_API void input_resource_PutAout( input_resource_t *, audio_output_t * );
|
|
|
|
/**
|
|
* Prevents the existing audio output (if any) from being recycled.
|
|
*/
|
|
VLC_API void input_resource_ResetAout( input_resource_t * );
|
|
|
|
/** @} */
|
|
#endif
|