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 ES selected for the es category (audio/video/spu) */
  39     ES_OUT_SET_ES,      /* arg1= es_out_id_t*                   */
  40     ES_OUT_RESTART_ES,  /* arg1= es_out_id_t*                   */
  41
  42     /* set 'default' tag on ES (copied across from container) */
  43     ES_OUT_SET_ES_DEFAULT, /* arg1= es_out_id_t*                */
  44
  45     /* force selection/unselection of the ES (bypass current mode) */
  46     ES_OUT_SET_ES_STATE,/* arg1= es_out_id_t* arg2=bool   */
  47     ES_OUT_GET_ES_STATE,/* arg1= es_out_id_t* arg2=bool*  */
  48
  49     /* sets es selection policy when in auto mode */
  50     ES_OUT_SET_ES_CAT_POLICY, /* arg1=es_format_category_e arg2=es_out_policy_e */
  51
  52     /* */
  53     ES_OUT_SET_GROUP,   /* arg1= int                            */
  54
  55     /* PCR handling, DTS/PTS will be automatically computed using thoses PCR
  56      * XXX: SET_PCR(_GROUP) are in charge of the pace control. They will wait
  57      * to slow down the demuxer so that it reads at the right speed.
  58      * XXX: if you want PREROLL just call ES_OUT_SET_NEXT_DISPLAY_TIME and send
  59      * as you would normally do.
  60      */
  61     ES_OUT_SET_PCR,             /* arg1=int64_t i_pcr(microsecond!) (using default group 0)*/
  62     ES_OUT_SET_GROUP_PCR,       /* arg1= int i_group, arg2=int64_t i_pcr(microsecond!)*/
  63     ES_OUT_RESET_PCR,           /* no arg */
  64
  65     /* Try not to use this one as it is a bit hacky */
  66     ES_OUT_SET_ES_FMT,         /* arg1= es_out_id_t* arg2=es_format_t* */
  67
  68     /* Allow preroll of data (data with dts/pts < i_pts for all ES will be decoded but not displayed */
  69     ES_OUT_SET_NEXT_DISPLAY_TIME,       /* arg1=int64_t i_pts(microsecond) */
  70     /* Set meta data for group (dynamic) (The vlc_meta_t is not modified nor released) */
  71     ES_OUT_SET_GROUP_META,  /* arg1=int i_group arg2=const vlc_meta_t */
  72     /* Set epg for group (dynamic) (The vlc_epg_t is not modified nor released) */
  73     ES_OUT_SET_GROUP_EPG,   /* arg1=int i_group arg2=const vlc_epg_t */
  74     /* */
  75     ES_OUT_DEL_GROUP,       /* arg1=int i_group */
  76
  77     /* Set scrambled state for one es */
  78     ES_OUT_SET_ES_SCRAMBLED_STATE,  /* arg1=int i_group arg2=es_out_id_t* */
  79
  80     /* Stop any buffering being done, and ask if es_out has no more data to
  81      * play.
  82      * It will not block and so MUST be used carrefully. The only good reason
  83      * is for interactive playback (like for DVD menu).
  84      * XXX You SHALL call ES_OUT_RESET_PCR before any other es_out_Control/Send calls. */
  85     ES_OUT_GET_EMPTY,       /* arg1=bool*   res=cannot fail */
  86
  87     /* Set global meta data (The vlc_meta_t is not modified nor released) */
  88     ES_OUT_SET_META, /* arg1=const vlc_meta_t * */
  89
  90     /* PCR system clock manipulation for external clock synchronization */
  91     ES_OUT_GET_PCR_SYSTEM, /* arg1=mtime_t *, arg2=mtime_t * res=can fail */
  92     ES_OUT_MODIFY_PCR_SYSTEM, /* arg1=int is_absolute, arg2=mtime_t, res=can fail */
  93
  94     /* First value usable for private control */
  95     ES_OUT_PRIVATE_START = 0x10000,
  96 };
  97
  98 enum es_out_policy_e
  99 {
 100     ES_OUT_ES_POLICY_EXCLUSIVE = 0,/* Enforces single ES selection only */
 101     ES_OUT_ES_POLICY_SIMULTANEOUS, /* Allows multiple ES per cat */
 102 };
 103
 104 struct es_out_t
 105 {
 106     es_out_id_t *(*pf_add)    ( es_out_t *, const es_format_t * );
 107     int          (*pf_send)   ( es_out_t *, es_out_id_t *, block_t * );
 108     void         (*pf_del)    ( es_out_t *, es_out_id_t * );
 109     int          (*pf_control)( es_out_t *, int i_query, va_list );
 110     void         (*pf_destroy)( es_out_t * );
 111
 112     es_out_sys_t    *p_sys;
 113 };
 114
 115 VLC_USED
 116 static inline es_out_id_t * es_out_Add( es_out_t *out, const es_format_t *fmt )
 117 {
 118     return out->pf_add( out, fmt );
 119 }
 120
 121 static inline void es_out_Del( es_out_t *out, es_out_id_t *id )
 122 {
 123     out->pf_del( out, id );
 124 }
 125
 126 static inline int es_out_Send( es_out_t *out, es_out_id_t *id,
 127                                block_t *p_block )
 128 {
 129     return out->pf_send( out, id, p_block );
 130 }
 131
 132 static inline int es_out_vaControl( es_out_t *out, int i_query, va_list args )
 133 {
 134     return out->pf_control( out, i_query, args );
 135 }
 136
 137 static inline int es_out_Control( es_out_t *out, int i_query, ... )
 138 {
 139     va_list args;
 140     int     i_result;
 141
 142     va_start( args, i_query );
 143     i_result = es_out_vaControl( out, i_query, args );
 144     va_end( args );
 145     return i_result;
 146 }
 147
 148 static inline void es_out_Delete( es_out_t *p_out )
 149 {
 150     p_out->pf_destroy( p_out );
 151 }
 152
 153 static inline int es_out_ControlSetMeta( es_out_t *out, const vlc_meta_t *p_meta )
 154 {
 155     return es_out_Control( out, ES_OUT_SET_META, p_meta );
 156 }
 157
 158 static inline int es_out_ControlGetPcrSystem( es_out_t *out, mtime_t *pi_system, mtime_t *pi_delay )
 159 {
 160     return es_out_Control( out, ES_OUT_GET_PCR_SYSTEM, pi_system, pi_delay );
 161 }
 162 static inline int es_out_ControlModifyPcrSystem( es_out_t *out, bool b_absolute, mtime_t i_system )
 163 {
 164     return es_out_Control( out, ES_OUT_MODIFY_PCR_SYSTEM, b_absolute, i_system );
 165 }
 166
 167 /**
 168  * @}
 169  */
 170
 171 #endif