include/vlc_es_out.h

   1 /*****************************************************************************
   2  * vlc_es_out.h: es_out (demuxer output) descriptor, queries and methods
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifndef VLC_ES_OUT_H
  25 #define VLC_ES_OUT_H 1
  26
  27 /**
  28  * \defgroup es_out ES output
  29  * \ingroup input
  30  * Elementary streams output
  31  * @{
  32  * \file
  33  * Elementary streams output interface
  34  */
  35
  36 enum es_out_query_e
  37 {
  38     /* set or change the selected ES in its category (audio/video/spu) */
  39     ES_OUT_SET_ES,      /* arg1= es_out_id_t*                   */
  40     ES_OUT_UNSET_ES,    /* arg1= es_out_id_t* res=can fail      */
  41     ES_OUT_RESTART_ES,  /* arg1= es_out_id_t*                   */
  42
  43     /* set 'default' tag on ES (copied across from container) */
  44     ES_OUT_SET_ES_DEFAULT, /* arg1= es_out_id_t*                */
  45
  46     /* force (un)selection of the ES (bypass current mode)
  47        XXX: this will not change the state of any other ES ! (see SET_ES) */
  48     ES_OUT_SET_ES_STATE,/* arg1= es_out_id_t* arg2=bool   */
  49     ES_OUT_GET_ES_STATE,/* arg1= es_out_id_t* arg2=bool*  */
  50
  51     /* sets es selection policy when in auto mode */
  52     ES_OUT_SET_ES_CAT_POLICY, /* arg1=es_format_category_e arg2=es_out_policy_e */
  53
  54     /* */
  55     ES_OUT_SET_GROUP,   /* arg1= int                            */
  56
  57     /* PCR handling, DTS/PTS will be automatically computed using thoses PCR
  58      * XXX: SET_PCR(_GROUP) are in charge of the pace control. They will wait
  59      * to slow down the demuxer so that it reads at the right speed.
  60      * XXX: if you want PREROLL just call ES_OUT_SET_NEXT_DISPLAY_TIME and send
  61      * as you would normally do.
  62      */
  63     ES_OUT_SET_PCR,             /* arg1=vlc_tick_t i_pcr(microsecond!) (using default group 0)*/
  64     ES_OUT_SET_GROUP_PCR,       /* arg1= int i_group, arg2=vlc_tick_t i_pcr(microsecond!)*/
  65     ES_OUT_RESET_PCR,           /* no arg */
  66
  67     /* Try not to use this one as it is a bit hacky */
  68     ES_OUT_SET_ES_FMT,         /* arg1= es_out_id_t* arg2=es_format_t* */
  69
  70     /* Allow preroll of data (data with dts/pts < i_pts for all ES will be decoded but not displayed */
  71     ES_OUT_SET_NEXT_DISPLAY_TIME,       /* arg1=int64_t i_pts(microsecond) */
  72     /* Set meta data for group (dynamic) (The vlc_meta_t is not modified nor released) */
  73     ES_OUT_SET_GROUP_META,  /* arg1=int i_group arg2=const vlc_meta_t */
  74     /* Set epg for group (dynamic) (The vlc_epg_t is not modified nor released) */
  75     ES_OUT_SET_GROUP_EPG,       /* arg1=int i_group arg2=const vlc_epg_t * */
  76     ES_OUT_SET_GROUP_EPG_EVENT, /* arg1=int i_group arg2=const vlc_epg_event_t * */
  77     ES_OUT_SET_EPG_TIME,        /* arg1=int int64_t */
  78
  79     /* */
  80     ES_OUT_DEL_GROUP,       /* arg1=int i_group */
  81
  82     /* Set scrambled state for one es */
  83     ES_OUT_SET_ES_SCRAMBLED_STATE,  /* arg1=int i_group arg2=es_out_id_t* */
  84
  85     /* Stop any buffering being done, and ask if es_out has no more data to
  86      * play.
  87      * It will not block and so MUST be used carrefully. The only good reason
  88      * is for interactive playback (like for DVD menu).
  89      * XXX You SHALL call ES_OUT_RESET_PCR before any other es_out_Control/Send calls. */
  90     ES_OUT_GET_EMPTY,       /* arg1=bool*   res=cannot fail */
  91
  92     /* Set global meta data (The vlc_meta_t is not modified nor released) */
  93     ES_OUT_SET_META, /* arg1=const vlc_meta_t * */
  94
  95     /* PCR system clock manipulation for external clock synchronization */
  96     ES_OUT_GET_PCR_SYSTEM, /* arg1=vlc_tick_t *, arg2=vlc_tick_t * res=can fail */
  97     ES_OUT_MODIFY_PCR_SYSTEM, /* arg1=int is_absolute, arg2=vlc_tick_t, res=can fail */
  98
  99     ES_OUT_POST_SUBNODE, /* arg1=input_item_node_t *, res=can fail */
 100
 101     /* First value usable for private control */
 102     ES_OUT_PRIVATE_START = 0x10000,
 103 };
 104
 105 enum es_out_policy_e
 106 {
 107     ES_OUT_ES_POLICY_EXCLUSIVE = 0,/* Enforces single ES selection only */
 108     ES_OUT_ES_POLICY_SIMULTANEOUS, /* Allows multiple ES per cat */
 109 };
 110
 111 struct es_out_callbacks
 112 {
 113     es_out_id_t *(*add)(es_out_t *, const es_format_t *);
 114     int          (*send)(es_out_t *, es_out_id_t *, block_t *);
 115     void         (*del)(es_out_t *, es_out_id_t *);
 116     int          (*control)(es_out_t *, int query, va_list);
 117     void         (*destroy)(es_out_t *);
 118 };
 119
 120 struct es_out_t
 121 {
 122     const struct es_out_callbacks *cbs;
 123 };
 124
 125 VLC_USED
 126 static inline es_out_id_t * es_out_Add( es_out_t *out, const es_format_t *fmt )
 127 {
 128     return out->cbs->add( out, fmt );
 129 }
 130
 131 static inline void es_out_Del( es_out_t *out, es_out_id_t *id )
 132 {
 133     out->cbs->del( out, id );
 134 }
 135
 136 static inline int es_out_Send( es_out_t *out, es_out_id_t *id,
 137                                block_t *p_block )
 138 {
 139     return out->cbs->send( out, id, p_block );
 140 }
 141
 142 static inline int es_out_vaControl( es_out_t *out, int i_query, va_list args )
 143 {
 144     return out->cbs->control( out, i_query, args );
 145 }
 146
 147 static inline int es_out_Control( es_out_t *out, int i_query, ... )
 148 {
 149     va_list args;
 150     int     i_result;
 151
 152     va_start( args, i_query );
 153     i_result = es_out_vaControl( out, i_query, args );
 154     va_end( args );
 155     return i_result;
 156 }
 157
 158 static inline void es_out_Delete( es_out_t *p_out )
 159 {
 160     p_out->cbs->destroy( p_out );
 161 }
 162
 163 static inline int es_out_SetPCR( es_out_t *out, vlc_tick_t pcr )
 164 {
 165     return es_out_Control( out, ES_OUT_SET_PCR, pcr );
 166 }
 167
 168 static inline int es_out_ControlSetMeta( es_out_t *out, const vlc_meta_t *p_meta )
 169 {
 170     return es_out_Control( out, ES_OUT_SET_META, p_meta );
 171 }
 172
 173 static inline int es_out_ControlGetPcrSystem( es_out_t *out, vlc_tick_t *pi_system, vlc_tick_t *pi_delay )
 174 {
 175     return es_out_Control( out, ES_OUT_GET_PCR_SYSTEM, pi_system, pi_delay );
 176 }
 177 static inline int es_out_ControlModifyPcrSystem( es_out_t *out, bool b_absolute, vlc_tick_t i_system )
 178 {
 179     return es_out_Control( out, ES_OUT_MODIFY_PCR_SYSTEM, b_absolute, i_system );
 180 }
 181
 182 /**
 183  * @}
 184  */
 185
 186 #endif