mirror of
https://code.videolan.org/videolan/vlc
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592 lines
19 KiB
C
592 lines
19 KiB
C
/*****************************************************************************
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* vlc_input.h: Core input structures
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*****************************************************************************
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* Copyright (C) 1999-2006 the VideoLAN team
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* $Id$
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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
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/* __ is need because conflict with <vlc/input.h> */
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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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* \file
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* This file defines functions, structures and enums for input objects in vlc
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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 <string.h>
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/*****************************************************************************
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* Meta data helpers
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*****************************************************************************/
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static inline void vlc_audio_replay_gain_MergeFromMeta( audio_replay_gain_t *p_dst,
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const vlc_meta_t *p_meta )
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{
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char * psz_value;
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if( !p_meta )
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return;
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if( (psz_value = (char *)vlc_dictionary_value_for_key( &p_meta->extra_tags, "REPLAYGAIN_TRACK_GAIN" )) ||
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(psz_value = (char *)vlc_dictionary_value_for_key( &p_meta->extra_tags, "RG_RADIO" )) )
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{
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p_dst->pb_gain[AUDIO_REPLAY_GAIN_TRACK] = true;
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p_dst->pf_gain[AUDIO_REPLAY_GAIN_TRACK] = atof( psz_value );
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}
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else if( (psz_value = (char *)vlc_dictionary_value_for_key( &p_meta->extra_tags, "REPLAYGAIN_TRACK_PEAK" )) ||
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(psz_value = (char *)vlc_dictionary_value_for_key( &p_meta->extra_tags, "RG_PEAK" )) )
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{
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p_dst->pb_peak[AUDIO_REPLAY_GAIN_TRACK] = true;
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p_dst->pf_peak[AUDIO_REPLAY_GAIN_TRACK] = atof( psz_value );
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}
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else if( (psz_value = (char *)vlc_dictionary_value_for_key( &p_meta->extra_tags, "REPLAYGAIN_ALBUM_GAIN" )) ||
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(psz_value = (char *)vlc_dictionary_value_for_key( &p_meta->extra_tags, "RG_AUDIOPHILE" )) )
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{
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p_dst->pb_gain[AUDIO_REPLAY_GAIN_ALBUM] = true;
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p_dst->pf_gain[AUDIO_REPLAY_GAIN_ALBUM] = atof( psz_value );
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}
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else if( (psz_value = (char *)vlc_dictionary_value_for_key( &p_meta->extra_tags, "REPLAYGAIN_ALBUM_PEAK" )) )
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{
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p_dst->pb_peak[AUDIO_REPLAY_GAIN_ALBUM] = true;
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p_dst->pf_peak[AUDIO_REPLAY_GAIN_ALBUM] = atof( psz_value );
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}
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}
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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_byte_offset;
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int64_t i_time_offset;
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char *psz_name;
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int i_level;
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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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point->i_byte_offset =
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point->i_time_offset = -1;
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point->i_level = 0;
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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( seekpoint_t *src )
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{
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seekpoint_t *point = vlc_seekpoint_New();
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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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point->i_byte_offset = src->i_byte_offset;
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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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typedef struct
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{
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char *psz_name;
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bool b_menu; /* Is it a menu or a normal entry */
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int64_t i_length; /* Length(microsecond) if known, else 0 */
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int64_t i_size; /* Size (bytes) if known, else 0 */
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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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t->psz_name = NULL;
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t->b_menu = false;
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t->i_length = 0;
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t->i_size = 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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{
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free( t->seekpoint[i]->psz_name );
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free( t->seekpoint[i] );
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}
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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( input_title_t *t )
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{
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input_title_t *dup = vlc_input_title_New( );
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int i;
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if( t->psz_name ) dup->psz_name = strdup( t->psz_name );
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dup->b_menu = t->b_menu;
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dup->i_length = t->i_length;
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dup->i_size = t->i_size;
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dup->i_seekpoint = t->i_seekpoint;
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if( t->i_seekpoint > 0 )
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{
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dup->seekpoint = (seekpoint_t**)calloc( t->i_seekpoint,
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sizeof(seekpoint_t*) );
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for( i = 0; i < t->i_seekpoint; i++ )
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{
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dup->seekpoint[i] = vlc_seekpoint_Duplicate( t->seekpoint[i] );
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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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int i_data;
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void *p_data;
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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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int i_data )
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{
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input_attachment_t *a =
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(input_attachment_t*)malloc( sizeof(input_attachment_t) );
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if( !a )
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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 = NULL;
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if( i_data > 0 )
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{
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a->p_data = malloc( i_data );
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if( a->p_data && p_data )
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memcpy( a->p_data, p_data, i_data );
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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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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->psz_name );
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free( a->psz_mime );
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free( a->psz_description );
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free( a->p_data );
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free( a );
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}
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/*****************************************************************************
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* input defines/constants.
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*****************************************************************************/
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/* i_update field of access_t/demux_t */
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#define INPUT_UPDATE_NONE 0x0000
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#define INPUT_UPDATE_SIZE 0x0001
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#define INPUT_UPDATE_TITLE 0x0010
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#define INPUT_UPDATE_SEEKPOINT 0x0020
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#define INPUT_UPDATE_META 0x0040
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#define INPUT_UPDATE_SIGNAL 0x0080
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/** Get the input item for an input thread
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* FIXME see src/input/item.c but is is unsafe unless
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* you hold p_input
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*/
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VLC_EXPORT(input_item_t*, input_GetItem, (input_thread_t*));
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typedef struct input_thread_private_t input_thread_private_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. You must use the helpers
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* to modify them
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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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bool b_eof;
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bool b_preparsing;
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bool b_dead;
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/* All other data is input_thread is PRIVATE. You can't access it
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* outside of src/input */
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input_thread_private_t *p;
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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-%H:%M:%S-$ 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" to get the index of spu track that is teletext -1 if no teletext)
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* - "signal-quality"
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* - "signal-strength"
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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, rate-slower, rate-faster
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* - position, position-offset
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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 integer used by the variable "rate" in the
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* range [INPUT_RATE_MIN, INPUT_RATE_MAX] the default value
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* being INPUT_RATE_DEFAULT.
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*
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* A value lower than INPUT_RATE_DEFAULT plays faster.
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* A value higher than INPUT_RATE_DEFAULT plays slower.
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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" or "length" has changed */
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INPUT_EVENT_TIMES,
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/* A title has been added or removed or selected.
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* It imply that chapter has changed (not 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 has been added or removed or selected */
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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 name has changed */
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INPUT_EVENT_ITEM_NAME,
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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 aout_instance_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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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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/* input_CreateThread
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* Release the returned input_thread_t using vlc_object_release() */
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#define input_CreateThread(a,b) __input_CreateThread(VLC_OBJECT(a),b)
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VLC_EXPORT( input_thread_t *, __input_CreateThread, ( vlc_object_t *, input_item_t * ) );
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VLC_EXPORT( void, input_StopThread, ( input_thread_t * ) );
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#define input_Read(a,b,c) __input_Read(VLC_OBJECT(a),b, c)
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VLC_EXPORT( int, __input_Read, ( vlc_object_t *, input_item_t *, bool ) );
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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" (1 is DEFAULT_RATE) */
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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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/* Meta datas */
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INPUT_ADD_INFO, /* arg1= char* arg2= char* arg3=... res=can fail */
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INPUT_GET_INFO, /* arg1= char* arg2= char* arg3= char** res=can fail */
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INPUT_DEL_INFO, /* arg1= char* arg2= char* res=can fail */
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INPUT_SET_NAME, /* arg1= char* res=can fail */
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/* Input config options */
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INPUT_ADD_OPTION, /* arg1= char * arg2= char * res=can fail*/
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/* Input properties */
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INPUT_GET_VIDEO_FPS, /* arg1= double * 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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/* 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 */
|
|
INPUT_ADD_SLAVE, /* arg1= const char * */
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|
INPUT_ADD_SUBTITLE, /* arg1= const char *, arg2=bool b_check_extension */
|
|
|
|
/* On the fly record while playing */
|
|
INPUT_SET_RECORD_STATE, /* arg1=bool res=can fail */
|
|
INPUT_GET_RECORD_STATE, /* arg1=bool* res=can fail */
|
|
|
|
/* ES */
|
|
INPUT_RESTART_ES, /* arg1=int (-AUDIO/VIDEO/SPU_ES for the whole category) */
|
|
|
|
/* Input ressources
|
|
* XXX You must call vlc_object_release as soon as possible */
|
|
INPUT_GET_AOUT, /* arg1=aout_instance_t ** res=can fail */
|
|
INPUT_GET_VOUTS, /* arg1=vout_thread_t ***, int * res=can fail */
|
|
};
|
|
|
|
VLC_EXPORT( int, input_vaControl,( input_thread_t *, int i_query, va_list ) );
|
|
VLC_EXPORT( int, input_Control, ( input_thread_t *, int i_query, ... ) );
|
|
|
|
/**
|
|
* It will return the current state of the input.
|
|
* Provided for convenience.
|
|
*/
|
|
static inline input_state_e input_GetState( input_thread_t * p_input )
|
|
{
|
|
input_state_e state = INIT_S;
|
|
input_Control( p_input, INPUT_GET_STATE, &state );
|
|
return state;
|
|
}
|
|
/**
|
|
* It will add a new subtitle source to the input.
|
|
* Provided for convenience.
|
|
*/
|
|
static inline int input_AddSubtitle( input_thread_t *p_input, const char *psz_url, bool b_check_extension )
|
|
{
|
|
return input_Control( p_input, INPUT_ADD_SUBTITLE, psz_url, b_check_extension );
|
|
}
|
|
|
|
/**
|
|
* Return one of the video output (if any). If possible, you should use
|
|
* INPUT_GET_VOUTS directly and process _all_ video outputs instead.
|
|
* @param p_input an input thread from which to get a video output
|
|
* @return NULL on error, or a video output thread pointer (which needs to be
|
|
* released with vlc_object_release()).
|
|
*/
|
|
static inline vout_thread_t *input_GetVout( input_thread_t *p_input )
|
|
{
|
|
vout_thread_t **pp_vout, *p_vout;
|
|
unsigned i_vout;
|
|
|
|
if( input_Control( p_input, INPUT_GET_VOUTS, &pp_vout, &i_vout ) )
|
|
return NULL;
|
|
|
|
for( unsigned i = 1; i < i_vout; i++ )
|
|
vlc_object_release( (vlc_object_t *)(pp_vout[i]) );
|
|
|
|
p_vout = (i_vout >= 1) ? pp_vout[0] : NULL;
|
|
free (pp_vout);
|
|
return p_vout;
|
|
}
|
|
|
|
/**
|
|
* 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 aout_instance_t *input_GetAout( input_thread_t *p_input )
|
|
{
|
|
aout_instance_t *p_aout;
|
|
return input_Control( p_input, INPUT_GET_AOUT, &p_aout ) ? NULL : p_aout;
|
|
}
|
|
|
|
/* */
|
|
typedef struct input_clock_t input_clock_t;
|
|
VLC_EXPORT( decoder_t *, input_DecoderNew, ( input_thread_t *, es_format_t *, input_clock_t *, sout_instance_t * ) );
|
|
VLC_EXPORT( void, input_DecoderDelete, ( decoder_t * ) );
|
|
VLC_EXPORT( void, input_DecoderDecode,( decoder_t *, block_t * ) );
|
|
|
|
/**
|
|
* This function allows to split a MRL into access, demux and path part.
|
|
*
|
|
* You should not write into access and demux string as they may not point into
|
|
* the provided buffer.
|
|
* The buffer provided by psz_dup will be modified.
|
|
*/
|
|
VLC_EXPORT( void, input_SplitMRL, ( const char **ppsz_access, const char **ppsz_demux, char **ppsz_path, char *psz_dup ) );
|
|
|
|
/**
|
|
* This function creates a sane filename path.
|
|
*/
|
|
VLC_EXPORT( char *, input_CreateFilename, ( vlc_object_t *, const char *psz_path, const char *psz_prefix, const char *psz_extension ) );
|
|
|
|
#endif
|