1 /*****************************************************************************
2 * vlc_codec.h: Definition of the decoder and encoder structures
3 *****************************************************************************
4 * Copyright (C) 1999-2003 the VideoLAN team
7 * Authors: Gildas Bazin <gbazin@netcourrier.com>
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.
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.
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 *****************************************************************************/
24 #if !defined( __LIBVLC__ )
25 #error You are not libvlc or one of its plugins. You cannot include this file
29 #define _VLC_CODEC_H 1
31 #include <vlc_block.h>
36 * This file defines the structure and types used by decoders and encoders
39 typedef struct decoder_owner_sys_t decoder_owner_sys_t;
42 * \defgroup decoder Decoder
44 * The structure describing a decoder
50 * BIG FAT WARNING : the code relies in the first 4 members of filter_t
51 * and decoder_t to be the same, so if you have anything to add, do it
52 * at the end of the structure.
58 /* Module properties */
60 decoder_sys_t * p_sys;
62 /* Input format ie from demuxer (XXX: a lot of field could be invalid) */
65 /* Output format of decoder/packetizer */
68 /* Some decoders only accept packetized data (ie. not truncated) */
69 vlc_bool_t b_need_packetized;
71 /* Tell the decoder if it is allowed to drop frames */
72 vlc_bool_t b_pace_control;
75 picture_t * ( * pf_decode_video )( decoder_t *, block_t ** );
76 aout_buffer_t * ( * pf_decode_audio )( decoder_t *, block_t ** );
77 subpicture_t * ( * pf_decode_sub) ( decoder_t *, block_t ** );
78 block_t * ( * pf_packetize ) ( decoder_t *, block_t ** );
80 /* Closed Caption (CEA 608/708) extraction.
81 * If set, it *may* be called after pf_decode_video/pf_packetize
82 * returned data. It should return CC for the pictures returned by the
83 * last pf_packetize/pf_decode_video call only,
84 * pb_present will be used to known which cc channel are present (but
85 * globaly, not necessary for the current packet */
86 block_t * ( * pf_get_cc ) ( decoder_t *, vlc_bool_t pb_present[4] );
92 /* Audio output callbacks */
93 aout_buffer_t * ( * pf_aout_buffer_new) ( decoder_t *, int );
94 void ( * pf_aout_buffer_del) ( decoder_t *, aout_buffer_t * );
96 /* Video output callbacks */
97 picture_t * ( * pf_vout_buffer_new) ( decoder_t * );
98 void ( * pf_vout_buffer_del) ( decoder_t *, picture_t * );
99 void ( * pf_picture_link) ( decoder_t *, picture_t * );
100 void ( * pf_picture_unlink) ( decoder_t *, picture_t * );
102 /* SPU output callbacks */
103 subpicture_t * ( * pf_spu_buffer_new) ( decoder_t * );
104 void ( * pf_spu_buffer_del) ( decoder_t *, subpicture_t * );
106 /* Private structure for the owner of the decoder */
107 decoder_owner_sys_t *p_owner;
115 * \defgroup decoder Encoder
117 * The structure describing a Encoder
126 /* Module properties */
128 encoder_sys_t * p_sys;
130 /* Properties of the input data fed to the encoder */
133 /* Properties of the output of the encoder */
136 block_t * ( * pf_encode_video )( encoder_t *, picture_t * );
137 block_t * ( * pf_encode_audio )( encoder_t *, aout_buffer_t * );
138 block_t * ( * pf_encode_sub )( encoder_t *, subpicture_t * );
140 /* Common encoder options */
141 int i_threads; /* Number of threads to use during encoding */
142 int i_iframes; /* One I frame per i_iframes */
143 int i_bframes; /* One B frame per i_bframes */
144 int i_tolerance; /* Bitrate tolerance */
147 config_chain_t *p_cfg;
154 VLC_EXPORT( input_attachment_t *, decoder_GetInputAttachment, ( decoder_t *, const char *psz_name ) );
155 VLC_EXPORT( int, decoder_GetInputAttachments, ( decoder_t *p_dec, input_attachment_t ***ppp_attachment, int *pi_attachment ) );
156 VLC_EXPORT( mtime_t, decoder_GetDisplayDate, ( decoder_t *, mtime_t ) );
158 #endif /* _VLC_CODEC_H */