1 /*****************************************************************************
2 * vout_synchro.h: frame-dropping structures
3 * Only used in libmpeg2 decoder at the moment
4 *****************************************************************************
5 * Copyright (C) 1999-2005 the VideoLAN team
8 * Authors: Christophe Massiot <massiot@via.ecp.fr>
9 * Jean-Marc Dressler <polux@via.ecp.fr>
10 * Stéphane Borel <stef@via.ecp.fr>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
27 /*****************************************************************************
28 * vout_synchro_t : timers for the video synchro
29 *****************************************************************************/
30 #define MAX_PIC_AVERAGE 8
32 /* Read the discussion on top of vout_synchro.c for more information. */
37 vout_thread_t * p_vout;
43 /* date of the beginning of the decoding of the current picture */
44 mtime_t decoding_start;
46 /* stream properties */
47 unsigned int i_n_p, i_n_b;
50 mtime_t p_tau[4]; /* average decoding durations */
51 unsigned int pi_meaningful[4]; /* number of durations read */
53 /* render_time filled by SynchroChoose() */
57 int i_nb_ref; /* Number of reference pictures */
58 int i_dec_nb_ref; /* Number of reference pictures we'll *
59 * have if we decode the current pic */
60 int i_trash_nb_ref; /* Number of reference pictures we'll *
61 * have if we trash the current pic */
62 unsigned int i_eta_p, i_eta_b;
63 mtime_t backward_pts, current_pts;
64 int i_current_period; /* period to add to the next picture */
65 int i_backward_period; /* period to add after the next
67 * (backward_period * period / 2) */
70 unsigned int i_trashed_pic, i_not_chosen_pic, i_pic;
74 #define I_CODING_TYPE 1
75 #define P_CODING_TYPE 2
76 #define B_CODING_TYPE 3
77 #define D_CODING_TYPE 4 /* MPEG-1 ONLY */
78 /* other values are reserved */
82 #define BOTTOM_FIELD 2
83 #define FRAME_STRUCTURE 3
85 /*****************************************************************************
87 *****************************************************************************/
88 #define vout_SynchroInit(a,b) __vout_SynchroInit(VLC_OBJECT(a),b)
89 VLC_EXPORT( vout_synchro_t *, __vout_SynchroInit, ( vlc_object_t *, int ) );
90 VLC_EXPORT( void, vout_SynchroRelease, ( vout_synchro_t * ) );
91 VLC_EXPORT( void, vout_SynchroReset, ( vout_synchro_t * ) );
92 VLC_EXPORT( vlc_bool_t, vout_SynchroChoose, ( vout_synchro_t *, int, int, vlc_bool_t ) );
93 VLC_EXPORT( void, vout_SynchroTrash, ( vout_synchro_t * ) );
94 VLC_EXPORT( void, vout_SynchroDecode, ( vout_synchro_t * ) );
95 VLC_EXPORT( void, vout_SynchroEnd, ( vout_synchro_t *, int, vlc_bool_t ) );
96 VLC_EXPORT( mtime_t, vout_SynchroDate, ( vout_synchro_t * ) );
97 VLC_EXPORT( void, vout_SynchroNewPicture, ( vout_synchro_t *, int, int, mtime_t, mtime_t, int, vlc_bool_t ) );