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96 lines
3.9 KiB
96 lines
3.9 KiB
/*****************************************************************************
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* vpar_synchro.h : video parser blocks management
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*****************************************************************************
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* Copyright (C) 1999, 2000 VideoLAN
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* $Id: vpar_synchro.h,v 1.2 2000/12/26 19:14:47 massiot Exp $
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*
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* Author: Christophe Massiot <massiot@via.ecp.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Requires:
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* "config.h"
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* "common.h"
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* "mtime.h"
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* "threads.h"
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* "input.h"
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* "video.h"
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* "video_output.h"
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* "decoder_fifo.h"
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* "video_fifo.h"
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*****************************************************************************/
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/*****************************************************************************
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* video_synchro_t and video_synchro_tab_s : timers for the video synchro
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*****************************************************************************/
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#define MAX_DECODING_PIC 16
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#define MAX_PIC_AVERAGE 8
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/* Read the discussion on top of vpar_synchro.c for more information. */
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typedef struct video_synchro_s
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{
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/* synchro algorithm */
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int i_type;
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/* fifo containing decoding dates */
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mtime_t p_date_fifo[MAX_DECODING_PIC];
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int pi_coding_types[MAX_DECODING_PIC];
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unsigned int i_start, i_end;
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vlc_mutex_t fifo_lock;
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/* stream properties */
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unsigned int i_n_p, i_n_b;
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/* decoding values */
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mtime_t p_tau[4]; /* average decoding durations */
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unsigned int pi_meaningful[4]; /* number of durations read */
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/* and p_vout->render_time (read with p_vout->change_lock) */
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/* stream context */
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unsigned int i_eta_p, i_eta_b;
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boolean_t b_dropped_last; /* for special synchros below */
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mtime_t backward_pts, current_pts;
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#ifdef STATS
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unsigned int i_trashed_pic, i_pic;
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#endif
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} video_synchro_t;
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#define FIFO_INCREMENT( i_counter ) \
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p_vpar->synchro.i_counter = \
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(p_vpar->synchro.i_counter + 1) % MAX_DECODING_PIC;
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/* Synchro algorithms */
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#define VPAR_SYNCHRO_DEFAULT 0
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#define VPAR_SYNCHRO_I 1
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#define VPAR_SYNCHRO_Iplus 2
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#define VPAR_SYNCHRO_IP 3
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#define VPAR_SYNCHRO_IPplus 4
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#define VPAR_SYNCHRO_IPB 5
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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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void vpar_SynchroInit ( struct vpar_thread_s * p_vpar );
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boolean_t vpar_SynchroChoose ( struct vpar_thread_s * p_vpar,
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int i_coding_type, int i_structure );
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void vpar_SynchroTrash ( struct vpar_thread_s * p_vpar,
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int i_coding_type, int i_structure );
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void vpar_SynchroDecode ( struct vpar_thread_s * p_vpar,
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int i_coding_type, int i_structure );
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void vpar_SynchroEnd ( struct vpar_thread_s * p_vpar, int i_garbage );
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mtime_t vpar_SynchroDate ( struct vpar_thread_s * p_vpar );
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