mirror of https://code.videolan.org/videolan/vlc
* Implementation of a frame-dropping algorithm for the libmpeg2 plug-in
(incomplete).
This commit is contained in:
parent
899ac5e221
commit
dd521c469b
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@ -203,6 +203,7 @@ HEADERS_include = \
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include/vlc_playlist.h \
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include/vlc_threads.h \
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include/vlc_threads_funcs.h \
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include/vout_synchro.h \
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include/win32_specific.h \
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include/osd.h \
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$(NULL)
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@ -387,6 +388,7 @@ SOURCES_libvlc_common = \
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src/video_output/video_text.c \
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src/video_output/video_text.h \
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src/video_output/vout_subpictures.c \
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src/video_output/vout_synchro.c \
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src/audio_output/common.c \
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src/audio_output/dec.c \
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src/audio_output/filters.c \
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@ -3,7 +3,7 @@
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* Collection of useful common types and macros definitions
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*****************************************************************************
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* Copyright (C) 1998, 1999, 2000 VideoLAN
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* $Id: vlc_common.h,v 1.60 2003/04/13 20:00:20 fenrir Exp $
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* $Id: vlc_common.h,v 1.61 2003/04/14 22:22:32 massiot Exp $
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*
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* Authors: Samuel Hocevar <sam@via.ecp.fr>
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* Vincent Seguin <seguin@via.ecp.fr>
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@ -242,6 +242,7 @@ typedef struct picture_sys_t picture_sys_t;
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typedef struct picture_heap_t picture_heap_t;
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typedef struct subpicture_t subpicture_t;
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typedef struct subpicture_sys_t subpicture_sys_t;
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typedef struct vout_synchro_t vout_synchro_t;
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/* Stream output */
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typedef struct sout_instance_t sout_instance_t;
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@ -0,0 +1,89 @@
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/*****************************************************************************
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* vout_synchro.h: frame-dropping structures
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*****************************************************************************
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* Copyright (C) 1999-2003 VideoLAN
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* $Id: vout_synchro.h,v 1.1 2003/04/14 22:22:32 massiot Exp $
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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* Jean-Marc Dressler <polux@via.ecp.fr>
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* Stéphane Borel <stef@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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* vout_synchro_t : timers for the video synchro
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*****************************************************************************/
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#define MAX_PIC_AVERAGE 8
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/* Read the discussion on top of vout_synchro.c for more information. */
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struct vout_synchro_t
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{
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VLC_COMMON_MEMBERS
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vout_thread_t * p_vout;
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int i_frame_rate;
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int i_current_rate;
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/* date of the beginning of the decoding of the current picture */
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mtime_t decoding_start;
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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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vlc_bool_t i_nb_ref; /* Number of reference pictures */
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unsigned int i_eta_p, i_eta_b;
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mtime_t backward_pts, current_pts;
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int i_current_period; /* period to add to the next picture */
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int i_backward_period; /* period to add after the next
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* reference picture
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* (backward_period * period / 2) */
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/* statistics */
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unsigned int i_trashed_pic, i_not_chosen_pic, i_pic;
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};
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/* Pictures types */
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#define I_CODING_TYPE 1
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#define P_CODING_TYPE 2
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#define B_CODING_TYPE 3
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#define D_CODING_TYPE 4 /* MPEG-1 ONLY */
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/* other values are reserved */
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/* Structures */
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#define TOP_FIELD 1
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#define BOTTOM_FIELD 2
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#define FRAME_STRUCTURE 3
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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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#define vout_SynchroInit(a,b,c) __vout_SynchroInit(VLC_OBJECT(a),b,c)
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VLC_EXPORT( vout_synchro_t *, __vout_SynchroInit, ( vlc_object_t *, vout_thread_t *, int ) );
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VLC_EXPORT( void, vout_SynchroRelease, ( vout_synchro_t * ) );
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VLC_EXPORT( void, vout_SynchroReset, ( vout_synchro_t * ) );
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VLC_EXPORT( vlc_bool_t, vout_SynchroChoose, ( vout_synchro_t *, int ) );
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VLC_EXPORT( void, vout_SynchroTrash, ( vout_synchro_t * ) );
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VLC_EXPORT( void, vout_SynchroDecode, ( vout_synchro_t * ) );
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VLC_EXPORT( void, vout_SynchroEnd, ( vout_synchro_t *, int, vlc_bool_t ) );
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VLC_EXPORT( mtime_t, vout_SynchroDate, ( vout_synchro_t * ) );
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VLC_EXPORT( void, vout_SynchroNewPicture, ( vout_synchro_t *, int, int, mtime_t, mtime_t, int ) );
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@ -2,7 +2,7 @@
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* libmpeg2.c: mpeg2 video decoder module making use of libmpeg2.
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*****************************************************************************
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* Copyright (C) 1999-2001 VideoLAN
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* $Id: libmpeg2.c,v 1.8 2003/04/07 17:35:01 gbazin Exp $
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* $Id: libmpeg2.c,v 1.9 2003/04/14 22:22:32 massiot Exp $
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*
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* Authors: Gildas Bazin <gbazin@netcourrier.com>
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*
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@ -34,6 +34,8 @@
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#include <mpeg2dec/mpeg2.h>
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#include "vout_synchro.h"
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/* Aspect ratio (ISO/IEC 13818-2 section 6.3.3, table 6-3) */
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#define AR_SQUARE_PICTURE 1 /* square pixels */
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#define AR_3_4_PICTURE 2 /* 3:4 picture (TV) */
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mtime_t i_previous_pts;
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mtime_t i_current_pts;
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mtime_t i_period_remainder;
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int i_current_rate;
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picture_t * p_picture_to_destroy;
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/*
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* Output properties
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*/
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vout_thread_t *p_vout;
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vout_synchro_t *p_synchro;
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} dec_thread_t;
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@ -102,6 +107,7 @@ static int OpenDecoder( vlc_object_t *p_this )
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p_fifo->pf_run = RunDecoder;
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* RunDecoder: the libmpeg2 decoder
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*****************************************************************************/
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p_dec->i_current_pts = 0;
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p_dec->i_previous_pts = 0;
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p_dec->i_period_remainder = 0;
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p_dec->p_picture_to_destroy = NULL;
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/* Initialize decoder */
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p_dec->p_mpeg2dec = mpeg2_init();
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break;
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}
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if( p_dec->p_pes->b_discontinuity )
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{
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vout_SynchroReset( p_dec->p_synchro );
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if ( p_dec->p_info->current_fbuf != NULL )
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p_dec->p_picture_to_destroy
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= p_dec->p_info->current_fbuf->id;
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}
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if( p_dec->p_pes->i_pts )
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{
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mpeg2_pts( p_dec->p_mpeg2dec,
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p_dec->i_previous_pts = p_dec->i_current_pts;
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p_dec->i_current_pts = p_dec->p_pes->i_pts;
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}
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p_dec->i_current_rate = p_dec->p_pes->i_rate;
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p_data = p_dec->p_pes->p_first;
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}
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{
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/* Initialize video output */
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uint8_t *buf[3];
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buf[0] = buf[1] = buf[2] = NULL;
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/* Check whether the input gives a particular aspect ratio */
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if( p_dec->p_fifo->p_demux_data
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mpeg2_custom_fbuf( p_dec->p_mpeg2dec, 1 );
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/* Set the first 2 reference frames */
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if( (p_pic = GetNewPicture( p_dec, buf )) == NULL ) break;
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mpeg2_set_buf( p_dec->p_mpeg2dec, buf, p_pic );
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if( (p_pic = GetNewPicture( p_dec, buf )) == NULL ) break;
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mpeg2_set_buf( p_dec->p_mpeg2dec, buf, p_pic );
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mpeg2_set_buf( p_dec->p_mpeg2dec, buf, NULL );
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mpeg2_set_buf( p_dec->p_mpeg2dec, buf, NULL );
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p_dec->p_synchro = vout_SynchroInit( p_dec->p_fifo, p_dec->p_vout,
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1000000 * 27 / p_dec->p_info->sequence->frame_period * 1001 );
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}
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break;
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case STATE_PICTURE:
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{
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uint8_t *buf[3];
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buf[0] = buf[1] = buf[2] = NULL;
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if( (p_pic = GetNewPicture( p_dec, buf )) == NULL ) break;
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mpeg2_set_buf( p_dec->p_mpeg2dec, buf, p_pic );
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vout_SynchroNewPicture( p_dec->p_synchro,
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p_dec->p_info->current_picture->flags & PIC_MASK_CODING_TYPE,
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p_dec->p_info->current_picture->nb_fields,
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(p_dec->p_info->current_picture->flags & PIC_FLAG_PTS) ?
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( (p_dec->p_info->current_picture->pts ==
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(uint32_t)p_dec->i_current_pts) ?
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p_dec->i_current_pts : p_dec->i_previous_pts ) : 0,
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0,
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p_dec->i_current_rate );
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/* Store the date for the picture */
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if( p_dec->p_info->current_picture->flags & PIC_FLAG_PTS )
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if ( !vout_SynchroChoose( p_dec->p_synchro,
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p_dec->p_info->current_picture->flags & PIC_MASK_CODING_TYPE ) )
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{
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p_pic->date = ( p_dec->p_info->current_picture->pts ==
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(uint32_t)p_dec->i_current_pts ) ?
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p_dec->i_current_pts : p_dec->i_previous_pts;
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mpeg2_skip( p_dec->p_mpeg2dec, 1 );
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vout_SynchroTrash( p_dec->p_synchro );
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mpeg2_set_buf( p_dec->p_mpeg2dec, buf, NULL );
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}
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else
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{
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mpeg2_skip( p_dec->p_mpeg2dec, 0 );
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vout_SynchroDecode( p_dec->p_synchro );
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if( (p_pic = GetNewPicture( p_dec, buf )) == NULL ) break;
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mpeg2_set_buf( p_dec->p_mpeg2dec, buf, p_pic );
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}
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}
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break;
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/* pass-through */
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case STATE_END:
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case STATE_SLICE:
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if( p_dec->p_info->display_fbuf
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&& p_dec->p_info->display_fbuf->id )
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{
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p_pic = (picture_t *)p_dec->p_info->display_fbuf->id;
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/* Date the new picture */
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if( p_dec->p_info->display_picture->flags & PIC_FLAG_PTS )
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if ( p_pic != NULL )
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{
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p_dec->i_pts = p_pic->date;
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p_dec->i_period_remainder = 0;
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if ( p_dec->p_picture_to_destroy != p_pic )
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{
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vout_SynchroEnd( p_dec->p_synchro,
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p_dec->p_info->display_picture->flags
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& PIC_MASK_CODING_TYPE,
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0 );
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vout_DatePicture( p_dec->p_vout, p_pic,
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vout_SynchroDate( p_dec->p_synchro ) );
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vout_DisplayPicture( p_dec->p_vout, p_pic );
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}
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else
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{
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p_dec->p_picture_to_destroy = NULL;
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vout_SynchroEnd( p_dec->p_synchro,
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p_dec->p_info->display_picture->flags
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& PIC_MASK_CODING_TYPE,
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1 );
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vout_DestroyPicture( p_dec->p_vout, p_pic );
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}
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}
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else
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if( p_dec->p_info->discard_fbuf &&
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p_dec->p_info->discard_fbuf->id )
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{
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p_dec->i_pts += ( (p_dec->p_info->sequence->frame_period +
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p_dec->i_period_remainder) / 27 );
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p_dec->i_period_remainder =
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p_dec->p_info->sequence->frame_period +
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p_dec->i_period_remainder -
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( p_dec->p_info->sequence->frame_period +
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p_dec->i_period_remainder ) / 27 * 27;
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}
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vout_DatePicture( p_dec->p_vout, p_pic, p_dec->i_pts );
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vout_DisplayPicture( p_dec->p_vout, p_pic );
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/* Handle pulldown by adding some delay to the pts of the next
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* picture. */
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if( p_dec->p_info->display_picture->nb_fields > 2 )
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{
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int i_repeat_fields =
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p_dec->p_info->display_picture->nb_fields - 2;
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p_dec->i_pts += ( (p_dec->p_info->sequence->frame_period +
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p_dec->i_period_remainder)
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/ 27 / 2 * i_repeat_fields );
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p_dec->i_period_remainder =
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p_dec->p_info->sequence->frame_period +
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p_dec->i_period_remainder -
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( p_dec->p_info->sequence->frame_period +
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p_dec->i_period_remainder ) / 27 / 2 * 27 * 2;
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vout_UnlinkPicture( p_dec->p_vout, p_pic );
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}
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}
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break;
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case STATE_INVALID:
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msg_Warn( p_dec->p_fifo, "Received STATE_INVALID" );
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break;
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default:
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break;
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}
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@ -357,6 +385,9 @@ static void CloseDecoder( dec_thread_t * p_dec )
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vout_Request( p_dec->p_fifo, p_dec->p_vout, 0, 0, 0, 0 );
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}
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if( p_dec->p_synchro )
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vout_SynchroRelease( p_dec->p_synchro );
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if( p_dec->p_mpeg2dec ) mpeg2_close( p_dec->p_mpeg2dec );
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free( p_dec );
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@ -380,6 +411,7 @@ static picture_t *GetNewPicture( dec_thread_t *p_dec, uint8_t **pp_buf )
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}
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if( p_pic == NULL )
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return NULL;
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vout_LinkPicture( p_dec->p_vout, p_pic );
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pp_buf[0] = p_pic->p[0].p_pixels;
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pp_buf[1] = p_pic->p[1].p_pixels;
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@ -2,7 +2,7 @@
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* modules.c : Builtin and plugin modules management functions
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*****************************************************************************
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* Copyright (C) 2001 VideoLAN
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* $Id: modules.c,v 1.117 2003/03/25 15:38:14 gbazin Exp $
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* $Id: modules.c,v 1.118 2003/04/14 22:22:32 massiot Exp $
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*
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* Authors: Samuel Hocevar <sam@zoy.org>
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* Ethan C. Baldridge <BaldridgeE@cadmus.com>
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@ -81,6 +81,7 @@
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#include "video.h"
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#include "video_output.h"
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#include "vout_synchro.h"
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#include "audio_output.h"
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#include "aout_internal.h"
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@ -5,7 +5,7 @@
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* thread, and destroy a previously oppened video output thread.
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*****************************************************************************
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* Copyright (C) 2000-2001 VideoLAN
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* $Id: video_output.c,v 1.217 2003/03/28 17:02:25 gbazin Exp $
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* $Id: video_output.c,v 1.218 2003/04/14 22:22:32 massiot Exp $
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*
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* Authors: Vincent Seguin <seguin@via.ecp.fr>
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*
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@ -638,7 +638,7 @@ static void RunThread( vout_thread_t *p_vout)
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display_date = 0;
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current_date = mdate();
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#ifdef STATS
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#if 0
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p_vout->c_loops++;
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if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
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{
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|
|
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@ -0,0 +1,522 @@
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/*****************************************************************************
|
||||
* vout_synchro.c : frame dropping routines
|
||||
*****************************************************************************
|
||||
* Copyright (C) 1999-2001 VideoLAN
|
||||
* $Id: vout_synchro.c,v 1.1 2003/04/14 22:22:32 massiot Exp $
|
||||
*
|
||||
* Authors: Christophe Massiot <massiot@via.ecp.fr>
|
||||
* Samuel Hocevar <sam@via.ecp.fr>
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||||
* Jean-Marc Dressler <polux@via.ecp.fr>
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||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
|
||||
*****************************************************************************/
|
||||
|
||||
/*
|
||||
* DISCUSSION : How to Write an efficient Frame-Dropping Algorithm
|
||||
* ==========
|
||||
*
|
||||
* This implementation is based on mathematical and statistical
|
||||
* developments. Older implementations used an enslavement, considering
|
||||
* that if we're late when reading an I picture, we will decode one frame
|
||||
* less. It had a tendancy to derive, and wasn't responsive enough, which
|
||||
* would have caused trouble with the stream control stuff.
|
||||
*
|
||||
* 1. Structure of a picture stream
|
||||
* =============================
|
||||
* Between 2 I's, we have for instance :
|
||||
* I B P B P B P B P B P B I
|
||||
* t0 t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 t11 t12
|
||||
* Please bear in mind that B's and IP's will be inverted when displaying
|
||||
* (decoding order != presentation order). Thus, t1 < t0.
|
||||
*
|
||||
* 2. Definitions
|
||||
* ===========
|
||||
* t[0..12] : Presentation timestamps of pictures 0..12.
|
||||
* t : Current timestamp, at the moment of the decoding.
|
||||
* T : Picture period, T = 1/frame_rate.
|
||||
* tau[I,P,B] : Mean time to decode an [I,P,B] picture.
|
||||
* tauYUV : Mean time to render a picture (given by the video_output).
|
||||
* tau´[I,P,B] = 2 * tau[I,P,B] + tauYUV
|
||||
* : Mean time + typical difference (estimated to tau/2, that
|
||||
* needs to be confirmed) + render time.
|
||||
* DELTA : A given error margin.
|
||||
*
|
||||
* 3. General considerations
|
||||
* ======================
|
||||
* We define three types of machines :
|
||||
* 14T > tauI : machines capable of decoding all I pictures
|
||||
* 2T > tauP : machines capable of decoding all P pictures
|
||||
* T > tauB : machines capable of decoding all B pictures
|
||||
*
|
||||
* 4. Decoding of an I picture
|
||||
* ========================
|
||||
* On fast machines, we decode all I's.
|
||||
* Otherwise :
|
||||
* We can decode an I picture if we simply have enough time to decode it
|
||||
* before displaying :
|
||||
* t0 - t > tau´I + DELTA
|
||||
*
|
||||
* 5. Decoding of a P picture
|
||||
* =======================
|
||||
* On fast machines, we decode all P's.
|
||||
* Otherwise :
|
||||
* First criterion : have time to decode it.
|
||||
* t2 - t > tau´P + DELTA
|
||||
*
|
||||
* Second criterion : it shouldn't prevent us from displaying the forthcoming
|
||||
* I picture, which is more important.
|
||||
* t12 - t > tau´P + tau´I + DELTA
|
||||
*
|
||||
* 6. Decoding of a B picture
|
||||
* =======================
|
||||
* On fast machines, we decode all B's. Otherwise :
|
||||
* t1 - t > tau´B + DELTA
|
||||
* Since the next displayed I or P is already decoded, we don't have to
|
||||
* worry about it.
|
||||
*
|
||||
* I hope you will have a pleasant flight and do not forget your life
|
||||
* jacket.
|
||||
* --Meuuh (2000-12-29)
|
||||
*/
|
||||
|
||||
/*****************************************************************************
|
||||
* Preamble
|
||||
*****************************************************************************/
|
||||
#include <stdlib.h> /* free() */
|
||||
#include <string.h> /* memcpy(), memset() */
|
||||
|
||||
#include <vlc/vlc.h>
|
||||
#include <vlc/vout.h>
|
||||
|
||||
#include "vout_synchro.h"
|
||||
#include "stream_control.h"
|
||||
|
||||
/*
|
||||
* Local prototypes
|
||||
*/
|
||||
|
||||
/* Error margins */
|
||||
#define DELTA (int)(0.075*CLOCK_FREQ)
|
||||
|
||||
#define DEFAULT_NB_P 5
|
||||
#define DEFAULT_NB_B 1
|
||||
|
||||
/*****************************************************************************
|
||||
* vout_SynchroInit : You know what ?
|
||||
*****************************************************************************/
|
||||
vout_synchro_t * __vout_SynchroInit( vlc_object_t * p_object,
|
||||
vout_thread_t * p_vout, int i_frame_rate )
|
||||
{
|
||||
vout_synchro_t * p_synchro = vlc_object_create( p_object,
|
||||
sizeof(vout_synchro_t) );
|
||||
if ( p_synchro == NULL )
|
||||
{
|
||||
msg_Err( p_object, "out of memory" );
|
||||
return NULL;
|
||||
}
|
||||
vlc_object_attach( p_synchro, p_vout );
|
||||
|
||||
/* We use a fake stream pattern, which is often right. */
|
||||
p_synchro->i_n_p = p_synchro->i_eta_p = DEFAULT_NB_P;
|
||||
p_synchro->i_n_b = p_synchro->i_eta_b = DEFAULT_NB_B;
|
||||
memset( p_synchro->p_tau, 0, 4 * sizeof(mtime_t) );
|
||||
memset( p_synchro->pi_meaningful, 0, 4 * sizeof(unsigned int) );
|
||||
p_synchro->i_nb_ref = 0;
|
||||
p_synchro->current_pts = mdate() + DEFAULT_PTS_DELAY;
|
||||
p_synchro->backward_pts = 0;
|
||||
p_synchro->i_current_period = p_synchro->i_backward_period = 0;
|
||||
p_synchro->i_trashed_pic = p_synchro->i_not_chosen_pic =
|
||||
p_synchro->i_pic = 0;
|
||||
|
||||
p_synchro->i_frame_rate = i_frame_rate;
|
||||
p_synchro->p_vout = p_vout;
|
||||
|
||||
return p_synchro;
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
* vout_SynchroRelease : You know what ?
|
||||
*****************************************************************************/
|
||||
void vout_SynchroRelease( vout_synchro_t * p_synchro )
|
||||
{
|
||||
vlc_object_detach( p_synchro );
|
||||
vlc_object_destroy( p_synchro );
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
* vout_SynchroReset : Reset the reference picture counter
|
||||
*****************************************************************************/
|
||||
void vout_SynchroReset( vout_synchro_t * p_synchro )
|
||||
{
|
||||
p_synchro->i_nb_ref = 0;
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
* vout_SynchroChoose : Decide whether we will decode a picture or not
|
||||
*****************************************************************************/
|
||||
vlc_bool_t vout_SynchroChoose( vout_synchro_t * p_synchro, int i_coding_type )
|
||||
{
|
||||
#define TAU_PRIME( coding_type ) (p_synchro->p_tau[(coding_type)] \
|
||||
+ (p_synchro->p_tau[(coding_type)] >> 1) \
|
||||
+ tau_yuv)
|
||||
#define S (*p_synchro)
|
||||
/* VPAR_SYNCHRO_DEFAULT */
|
||||
mtime_t now, period, tau_yuv;
|
||||
mtime_t pts = 0;
|
||||
vlc_bool_t b_decode = 0;
|
||||
|
||||
now = mdate();
|
||||
period = 1000000 * 1001 / p_synchro->i_frame_rate
|
||||
* p_synchro->i_current_rate / DEFAULT_RATE;
|
||||
|
||||
vlc_mutex_lock( &p_synchro->p_vout->change_lock );
|
||||
tau_yuv = p_synchro->p_vout->render_time;
|
||||
vlc_mutex_unlock( &p_synchro->p_vout->change_lock );
|
||||
|
||||
switch( i_coding_type )
|
||||
{
|
||||
case I_CODING_TYPE:
|
||||
if( S.backward_pts )
|
||||
{
|
||||
pts = S.backward_pts;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* displaying order : B B P B B I
|
||||
* ^ ^
|
||||
* | +- current picture
|
||||
* +- current PTS
|
||||
*/
|
||||
pts = S.current_pts + period * (S.i_n_b + 2);
|
||||
}
|
||||
|
||||
if( (1 + S.i_n_p * (S.i_n_b + 1)) * period >
|
||||
S.p_tau[I_CODING_TYPE] )
|
||||
{
|
||||
b_decode = 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
b_decode = (pts - now) > (TAU_PRIME(I_CODING_TYPE) + DELTA);
|
||||
}
|
||||
if( !b_decode )
|
||||
{
|
||||
msg_Warn( p_synchro,
|
||||
"synchro trashing I ("I64Fd")", pts - now );
|
||||
p_synchro->i_nb_ref = 0;
|
||||
}
|
||||
else if( p_synchro->i_nb_ref < 2 )
|
||||
p_synchro->i_nb_ref++;
|
||||
break;
|
||||
|
||||
case P_CODING_TYPE:
|
||||
if( S.backward_pts )
|
||||
{
|
||||
pts = S.backward_pts;
|
||||
}
|
||||
else
|
||||
{
|
||||
pts = S.current_pts + period * (S.i_n_b + 1);
|
||||
}
|
||||
|
||||
if( p_synchro->i_nb_ref < 1 )
|
||||
{
|
||||
b_decode = 0;
|
||||
}
|
||||
else if( (1 + S.i_n_p * (S.i_n_b + 1)) * period >
|
||||
S.p_tau[I_CODING_TYPE] )
|
||||
{
|
||||
if( (S.i_n_b + 1) * period > S.p_tau[P_CODING_TYPE] )
|
||||
{
|
||||
/* Security in case we're _really_ late */
|
||||
b_decode = (pts - now > 0);
|
||||
}
|
||||
else
|
||||
{
|
||||
b_decode = (pts - now) > (TAU_PRIME(P_CODING_TYPE) + DELTA);
|
||||
/* next I */
|
||||
b_decode &= (pts - now
|
||||
+ period
|
||||
* ( (S.i_n_p - S.i_eta_p) * (1 + S.i_n_b) - 1 ))
|
||||
> (TAU_PRIME(P_CODING_TYPE)
|
||||
+ TAU_PRIME(I_CODING_TYPE) + DELTA);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
b_decode = 0;
|
||||
}
|
||||
if( b_decode )
|
||||
p_synchro->i_nb_ref = 2;
|
||||
else
|
||||
p_synchro->i_nb_ref = 0;
|
||||
break;
|
||||
|
||||
case B_CODING_TYPE:
|
||||
pts = S.current_pts;
|
||||
|
||||
if( p_synchro->i_nb_ref < 2 )
|
||||
{
|
||||
b_decode = 0;
|
||||
}
|
||||
else if( (S.i_n_b + 1) * period > S.p_tau[P_CODING_TYPE] )
|
||||
{
|
||||
b_decode = (pts - now) > (TAU_PRIME(B_CODING_TYPE) + DELTA);
|
||||
}
|
||||
else
|
||||
{
|
||||
b_decode = 0;
|
||||
}
|
||||
}
|
||||
|
||||
if( !b_decode )
|
||||
{
|
||||
S.i_not_chosen_pic++;
|
||||
}
|
||||
return( b_decode );
|
||||
#undef S
|
||||
#undef TAU_PRIME
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
* vout_SynchroTrash : Update counters when we trash a picture
|
||||
*****************************************************************************/
|
||||
void vout_SynchroTrash( vout_synchro_t * p_synchro )
|
||||
{
|
||||
p_synchro->i_trashed_pic++;
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
* vout_SynchroDecode : Update timers when we decide to decode a picture
|
||||
*****************************************************************************/
|
||||
void vout_SynchroDecode( vout_synchro_t * p_synchro )
|
||||
{
|
||||
p_synchro->decoding_start = mdate();
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
* vout_SynchroEnd : Called when the image is totally decoded
|
||||
*****************************************************************************/
|
||||
void vout_SynchroEnd( vout_synchro_t * p_synchro, int i_coding_type,
|
||||
vlc_bool_t b_garbage )
|
||||
{
|
||||
mtime_t tau;
|
||||
|
||||
if( !b_garbage )
|
||||
{
|
||||
tau = mdate() - p_synchro->decoding_start;
|
||||
|
||||
/* If duration too high, something happened (pause ?), so don't
|
||||
* take it into account. */
|
||||
if( tau < 3 * p_synchro->p_tau[i_coding_type]
|
||||
|| !p_synchro->pi_meaningful[i_coding_type] )
|
||||
{
|
||||
/* Mean with average tau, to ensure stability. */
|
||||
p_synchro->p_tau[i_coding_type] =
|
||||
(p_synchro->pi_meaningful[i_coding_type]
|
||||
* p_synchro->p_tau[i_coding_type] + tau)
|
||||
/ (p_synchro->pi_meaningful[i_coding_type] + 1);
|
||||
if( p_synchro->pi_meaningful[i_coding_type] < MAX_PIC_AVERAGE )
|
||||
{
|
||||
p_synchro->pi_meaningful[i_coding_type]++;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
* vout_SynchroDate : When an image has been decoded, ask for its date
|
||||
*****************************************************************************/
|
||||
mtime_t vout_SynchroDate( vout_synchro_t * p_synchro )
|
||||
{
|
||||
/* No need to lock, since PTS are only used by the video parser. */
|
||||
return p_synchro->current_pts;
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
* vout_SynchroNewPicture: Update stream structure and PTS
|
||||
*****************************************************************************/
|
||||
void vout_SynchroNewPicture( vout_synchro_t * p_synchro, int i_coding_type,
|
||||
int i_repeat_field, mtime_t next_pts,
|
||||
mtime_t next_dts, int i_current_rate )
|
||||
{
|
||||
mtime_t period = 1000000 * 1001 / p_synchro->i_frame_rate
|
||||
* i_current_rate / DEFAULT_RATE;
|
||||
#if 0
|
||||
mtime_t now = mdate();
|
||||
#endif
|
||||
p_synchro->i_current_rate = i_current_rate;
|
||||
|
||||
switch( i_coding_type )
|
||||
{
|
||||
case I_CODING_TYPE:
|
||||
if( p_synchro->i_eta_p
|
||||
&& p_synchro->i_eta_p != p_synchro->i_n_p )
|
||||
{
|
||||
#if 0
|
||||
msg_Dbg( p_synchro,
|
||||
"stream periodicity changed from P[%d] to P[%d]",
|
||||
p_synchro->i_n_p, p_synchro->i_eta_p );
|
||||
#endif
|
||||
p_synchro->i_n_p = p_synchro->i_eta_p;
|
||||
}
|
||||
p_synchro->i_eta_p = p_synchro->i_eta_b = 0;
|
||||
|
||||
#if 0
|
||||
msg_Dbg( p_synchro, "I("I64Fd") P("I64Fd")[%d] B("I64Fd")"
|
||||
"[%d] YUV("I64Fd") : trashed %d:%d/%d",
|
||||
p_synchro->p_tau[I_CODING_TYPE],
|
||||
p_synchro->p_tau[P_CODING_TYPE],
|
||||
p_synchro->i_n_p,
|
||||
p_synchro->p_tau[B_CODING_TYPE],
|
||||
p_synchro->i_n_b,
|
||||
p_synchro->p_vout->render_time,
|
||||
p_synchro->i_not_chosen_pic,
|
||||
p_synchro->i_trashed_pic -
|
||||
p_synchro->i_not_chosen_pic,
|
||||
p_synchro->i_pic );
|
||||
p_synchro->i_trashed_pic = p_synchro->i_not_chosen_pic
|
||||
= p_synchro->i_pic = 0;
|
||||
#else
|
||||
if ( p_synchro->i_pic >= 100 )
|
||||
{
|
||||
msg_Dbg( p_synchro, "decoded %d/%d pictures",
|
||||
p_synchro->i_pic
|
||||
- p_synchro->i_trashed_pic,
|
||||
p_synchro->i_pic );
|
||||
p_synchro->i_trashed_pic = p_synchro->i_not_chosen_pic
|
||||
= p_synchro->i_pic = 0;
|
||||
}
|
||||
#endif
|
||||
break;
|
||||
|
||||
case P_CODING_TYPE:
|
||||
p_synchro->i_eta_p++;
|
||||
if( p_synchro->i_eta_b
|
||||
&& p_synchro->i_eta_b != p_synchro->i_n_b )
|
||||
{
|
||||
msg_Warn( p_synchro,
|
||||
"stream periodicity changed from B[%d] to B[%d]",
|
||||
p_synchro->i_n_b, p_synchro->i_eta_b );
|
||||
p_synchro->i_n_b = p_synchro->i_eta_b;
|
||||
}
|
||||
p_synchro->i_eta_b = 0;
|
||||
break;
|
||||
case B_CODING_TYPE:
|
||||
p_synchro->i_eta_b++;
|
||||
break;
|
||||
}
|
||||
|
||||
p_synchro->current_pts += p_synchro->i_current_period
|
||||
* (period >> 1);
|
||||
|
||||
#define PTS_THRESHOLD (period >> 2)
|
||||
if( i_coding_type == B_CODING_TYPE )
|
||||
{
|
||||
/* A video frame can be displayed 1, 2 or 3 times, according to
|
||||
* repeat_first_field, top_field_first, progressive_sequence and
|
||||
* progressive_frame. */
|
||||
p_synchro->i_current_period = i_repeat_field;
|
||||
|
||||
if( next_pts )
|
||||
{
|
||||
if( next_pts - p_synchro->current_pts
|
||||
> PTS_THRESHOLD
|
||||
|| p_synchro->current_pts - next_pts
|
||||
> PTS_THRESHOLD )
|
||||
{
|
||||
msg_Warn( p_synchro, "vout synchro warning: pts != "
|
||||
"current_date ("I64Fd")",
|
||||
p_synchro->current_pts
|
||||
- next_pts );
|
||||
}
|
||||
p_synchro->current_pts = next_pts;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
p_synchro->i_current_period = p_synchro->i_backward_period;
|
||||
p_synchro->i_backward_period = i_repeat_field;
|
||||
|
||||
if( p_synchro->backward_pts )
|
||||
{
|
||||
if( next_dts &&
|
||||
(next_dts - p_synchro->backward_pts
|
||||
> PTS_THRESHOLD
|
||||
|| p_synchro->backward_pts - next_dts
|
||||
> PTS_THRESHOLD) )
|
||||
{
|
||||
msg_Warn( p_synchro, "backward_pts != dts ("I64Fd")",
|
||||
next_dts
|
||||
- p_synchro->backward_pts );
|
||||
}
|
||||
if( p_synchro->backward_pts - p_synchro->current_pts
|
||||
> PTS_THRESHOLD
|
||||
|| p_synchro->current_pts - p_synchro->backward_pts
|
||||
> PTS_THRESHOLD )
|
||||
{
|
||||
msg_Warn( p_synchro,
|
||||
"backward_pts != current_pts ("I64Fd")",
|
||||
p_synchro->current_pts
|
||||
- p_synchro->backward_pts );
|
||||
}
|
||||
p_synchro->current_pts = p_synchro->backward_pts;
|
||||
p_synchro->backward_pts = 0;
|
||||
}
|
||||
else if( next_dts )
|
||||
{
|
||||
if( next_dts - p_synchro->current_pts
|
||||
> PTS_THRESHOLD
|
||||
|| p_synchro->current_pts - next_dts
|
||||
> PTS_THRESHOLD )
|
||||
{
|
||||
msg_Warn( p_synchro, "dts != current_pts ("I64Fd")",
|
||||
p_synchro->current_pts
|
||||
- next_dts );
|
||||
}
|
||||
/* By definition of a DTS. */
|
||||
p_synchro->current_pts = next_dts;
|
||||
next_dts = 0;
|
||||
}
|
||||
|
||||
if( next_pts )
|
||||
{
|
||||
/* Store the PTS for the next time we have to date an I picture. */
|
||||
p_synchro->backward_pts = next_pts;
|
||||
next_pts = 0;
|
||||
}
|
||||
}
|
||||
#undef PTS_THRESHOLD
|
||||
|
||||
#if 0
|
||||
/* Removed for incompatibility with slow motion */
|
||||
if( p_synchro->current_pts + DEFAULT_PTS_DELAY < now )
|
||||
{
|
||||
/* We cannot be _that_ late, something must have happened, reinit
|
||||
* the dates. */
|
||||
msg_Warn( p_synchro, "PTS << now ("I64Fd"), resetting",
|
||||
now - p_synchro->current_pts - DEFAULT_PTS_DELAY );
|
||||
p_synchro->current_pts = now + DEFAULT_PTS_DELAY;
|
||||
}
|
||||
if( p_synchro->backward_pts
|
||||
&& p_synchro->backward_pts + DEFAULT_PTS_DELAY < now )
|
||||
{
|
||||
/* The same. */
|
||||
p_synchro->backward_pts = 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
p_synchro->i_pic++;
|
||||
}
|
Loading…
Reference in New Issue