include/vlc_codec.h

   1 /*****************************************************************************
   2  * vlc_codec.h: Definition of the decoder and encoder structures
   3  *****************************************************************************
   4  * Copyright (C) 1999-2003 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@netcourrier.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 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 General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifndef VLC_CODEC_H
  25 #define VLC_CODEC_H 1
  26
  27 #include <vlc_block.h>
  28 #include <vlc_es.h>
  29
  30 /**
  31  * \file
  32  * This file defines the structure and types used by decoders and encoders
  33  */
  34
  35 typedef struct decoder_owner_sys_t decoder_owner_sys_t;
  36
  37 /**
  38  * \defgroup decoder Decoder
  39  *
  40  * The structure describing a decoder
  41  *
  42  * @{
  43  */
  44
  45 /*
  46  * BIG FAT WARNING : the code relies in the first 4 members of filter_t
  47  * and decoder_t to be the same, so if you have anything to add, do it
  48  * at the end of the structure.
  49  */
  50 struct decoder_t
  51 {
  52     VLC_COMMON_MEMBERS
  53
  54     /* Module properties */
  55     module_t *          p_module;
  56     decoder_sys_t *     p_sys;
  57
  58     /* Input format ie from demuxer (XXX: a lot of field could be invalid) */
  59     es_format_t         fmt_in;
  60
  61     /* Output format of decoder/packetizer */
  62     es_format_t         fmt_out;
  63
  64     /* Some decoders only accept packetized data (ie. not truncated) */
  65     bool          b_need_packetized;
  66
  67     /* Tell the decoder if it is allowed to drop frames */
  68     bool          b_pace_control;
  69
  70     /* */
  71     picture_t *         ( * pf_decode_video )( decoder_t *, block_t ** );
  72     aout_buffer_t *     ( * pf_decode_audio )( decoder_t *, block_t ** );
  73     subpicture_t *      ( * pf_decode_sub)   ( decoder_t *, block_t ** );
  74     block_t *           ( * pf_packetize )   ( decoder_t *, block_t ** );
  75
  76     /* Closed Caption (CEA 608/708) extraction.
  77      * If set, it *may* be called after pf_decode_video/pf_packetize
  78      * returned data. It should return CC for the pictures returned by the
  79      * last pf_packetize/pf_decode_video call only,
  80      * pb_present will be used to known which cc channel are present (but
  81      * globaly, not necessary for the current packet */
  82     block_t *           ( * pf_get_cc )      ( decoder_t *, bool pb_present[4] );
  83
  84     /*
  85      * Buffers allocation
  86      */
  87
  88     /* Audio output callbacks */
  89     aout_buffer_t * ( * pf_aout_buffer_new) ( decoder_t *, int );
  90     void            ( * pf_aout_buffer_del) ( decoder_t *, aout_buffer_t * );
  91
  92     /* Video output callbacks */
  93     picture_t     * ( * pf_vout_buffer_new) ( decoder_t * );
  94     void            ( * pf_vout_buffer_del) ( decoder_t *, picture_t * );
  95     void            ( * pf_picture_link)    ( decoder_t *, picture_t * );
  96     void            ( * pf_picture_unlink)  ( decoder_t *, picture_t * );
  97
  98     /* SPU output callbacks */
  99     subpicture_t *  ( * pf_spu_buffer_new) ( decoder_t * );
 100     void            ( * pf_spu_buffer_del) ( decoder_t *, subpicture_t * );
 101
 102     /* Private structure for the owner of the decoder */
 103     decoder_owner_sys_t *p_owner;
 104 };
 105
 106 /**
 107  * @}
 108  */
 109
 110 /**
 111  * \defgroup decoder Encoder
 112  *
 113  * The structure describing a Encoder
 114  *
 115  * @{
 116  */
 117
 118 struct encoder_t
 119 {
 120     VLC_COMMON_MEMBERS
 121
 122     /* Module properties */
 123     module_t *          p_module;
 124     encoder_sys_t *     p_sys;
 125
 126     /* Properties of the input data fed to the encoder */
 127     es_format_t         fmt_in;
 128
 129     /* Properties of the output of the encoder */
 130     es_format_t         fmt_out;
 131
 132     block_t *           ( * pf_encode_video )( encoder_t *, picture_t * );
 133     block_t *           ( * pf_encode_audio )( encoder_t *, aout_buffer_t * );
 134     block_t *           ( * pf_encode_sub )( encoder_t *, subpicture_t * );
 135
 136     /* Common encoder options */
 137     int i_threads;               /* Number of threads to use during encoding */
 138     int i_iframes;               /* One I frame per i_iframes */
 139     int i_bframes;               /* One B frame per i_bframes */
 140     int i_tolerance;             /* Bitrate tolerance */
 141
 142     /* Encoder config */
 143     config_chain_t *p_cfg;
 144 };
 145
 146 /**
 147  * @}
 148  */
 149
 150 VLC_EXPORT( input_attachment_t *, decoder_GetInputAttachment, ( decoder_t *, const char *psz_name ) );
 151 VLC_EXPORT( int, decoder_GetInputAttachments, ( decoder_t *p_dec, input_attachment_t ***ppp_attachment, int *pi_attachment ) );
 152 VLC_EXPORT( mtime_t, decoder_GetDisplayDate, ( decoder_t *, mtime_t ) );
 153
 154 #endif /* _VLC_CODEC_H */