--- /dev/null
+/*****************************************************************************
+ * vlc_codec_synchro.h: frame-dropping structures
+ *****************************************************************************
+ * Copyright (C) 1999-2005 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Christophe Massiot <massiot@via.ecp.fr>
+ * Jean-Marc Dressler <polux@via.ecp.fr>
+ * Stéphane Borel <stef@via.ecp.fr>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#if !defined( __LIBVLC__ )
+ #error You are not libvlc or one of its plugins. You cannot include this file
+#endif
+
+/*****************************************************************************
+ * decoder_synchro_t : timers for the video synchro
+ *****************************************************************************/
+/* Read the discussion on top of decoder_synchro.c for more information. */
+/* Pictures types */
+#define I_CODING_TYPE 1
+#define P_CODING_TYPE 2
+#define B_CODING_TYPE 3
+#define D_CODING_TYPE 4 /* MPEG-1 ONLY */
+/* other values are reserved */
+
+/*****************************************************************************
+ * Prototypes
+ *****************************************************************************/
+VLC_EXPORT( decoder_synchro_t *, decoder_SynchroInit, ( decoder_t *, int ) );
+VLC_EXPORT( void, decoder_SynchroRelease, ( decoder_synchro_t * ) );
+VLC_EXPORT( void, decoder_SynchroReset, ( decoder_synchro_t * ) );
+VLC_EXPORT( vlc_bool_t, decoder_SynchroChoose, ( decoder_synchro_t *, int, int, vlc_bool_t ) );
+VLC_EXPORT( void, decoder_SynchroTrash, ( decoder_synchro_t * ) );
+VLC_EXPORT( void, decoder_SynchroDecode, ( decoder_synchro_t * ) );
+VLC_EXPORT( void, decoder_SynchroEnd, ( decoder_synchro_t *, int, vlc_bool_t ) );
+VLC_EXPORT( mtime_t, decoder_SynchroDate, ( decoder_synchro_t * ) );
+VLC_EXPORT( void, decoder_SynchroNewPicture, ( decoder_synchro_t *, int, int, mtime_t, mtime_t, int, vlc_bool_t ) );
+
+++ /dev/null
-/*****************************************************************************
- * vout_synchro.h: frame-dropping structures
- * Only used in libmpeg2 decoder at the moment
- *****************************************************************************
- * Copyright (C) 1999-2005 the VideoLAN team
- * $Id$
- *
- * Authors: Christophe Massiot <massiot@via.ecp.fr>
- * Jean-Marc Dressler <polux@via.ecp.fr>
- * Stéphane Borel <stef@via.ecp.fr>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
-
-#if !defined( __LIBVLC__ )
- #error You are not libvlc or one of its plugins. You cannot include this file
-#endif
-
-/*****************************************************************************
- * vout_synchro_t : timers for the video synchro
- *****************************************************************************/
-/* Read the discussion on top of vout_synchro.c for more information. */
-/* Pictures types */
-#define I_CODING_TYPE 1
-#define P_CODING_TYPE 2
-#define B_CODING_TYPE 3
-#define D_CODING_TYPE 4 /* MPEG-1 ONLY */
-/* other values are reserved */
-
-/*****************************************************************************
- * Prototypes
- *****************************************************************************/
-#define vout_SynchroInit(a,b) __vout_SynchroInit(VLC_OBJECT(a),b)
-VLC_EXPORT( vout_synchro_t *, __vout_SynchroInit, ( vlc_object_t *, int ) );
-VLC_EXPORT( void, vout_SynchroRelease, ( vout_synchro_t * ) );
-VLC_EXPORT( void, vout_SynchroReset, ( vout_synchro_t * ) );
-VLC_EXPORT( vlc_bool_t, vout_SynchroChoose, ( vout_synchro_t *, int, int, vlc_bool_t ) );
-VLC_EXPORT( void, vout_SynchroTrash, ( vout_synchro_t * ) );
-VLC_EXPORT( void, vout_SynchroDecode, ( vout_synchro_t * ) );
-VLC_EXPORT( void, vout_SynchroEnd, ( vout_synchro_t *, int, vlc_bool_t ) );
-VLC_EXPORT( mtime_t, vout_SynchroDate, ( vout_synchro_t * ) );
-VLC_EXPORT( void, vout_SynchroNewPicture, ( vout_synchro_t *, int, int, mtime_t, mtime_t, int, vlc_bool_t ) );
-
#include <mpeg2dec/mpeg2.h>
-#include <vlc_vout_synchro.h>
+#include <vlc_codec_synchro.h>
/* Aspect ratio (ISO/IEC 13818-2 section 6.3.3, table 6-3) */
#define AR_SQUARE_PICTURE 1 /* square pixels */
/*
* Output properties
*/
- vout_synchro_t *p_synchro;
+ decoder_synchro_t *p_synchro;
int i_aspect;
int i_sar_num;
int i_sar_den;
p_sys->p_info->sequence &&
p_sys->p_info->sequence->width != (unsigned)-1 )
{
- vout_SynchroReset( p_sys->p_synchro );
+ decoder_SynchroReset( p_sys->p_synchro );
if( p_sys->p_info->current_fbuf != NULL
&& p_sys->p_info->current_fbuf->id != NULL )
{
if ( p_sys->b_slice_i )
{
- vout_SynchroNewPicture( p_sys->p_synchro,
+ decoder_SynchroNewPicture( p_sys->p_synchro,
I_CODING_TYPE, 2, 0, 0, p_sys->i_current_rate,
p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
- vout_SynchroDecode( p_sys->p_synchro );
- vout_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
+ decoder_SynchroDecode( p_sys->p_synchro );
+ decoder_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
}
}
{
p_sys->b_preroll = VLC_FALSE;
/* Reset synchro */
- vout_SynchroReset( p_sys->p_synchro );
+ decoder_SynchroReset( p_sys->p_synchro );
}
#ifdef PIC_FLAG_PTS
if( p_sys->p_synchro )
{
- vout_SynchroRelease( p_sys->p_synchro );
+ decoder_SynchroRelease( p_sys->p_synchro );
}
- p_sys->p_synchro = vout_SynchroInit( p_dec,
+ p_sys->p_synchro = decoder_SynchroInit( p_dec,
(uint32_t)((uint64_t)1001000000 * 27 /
p_sys->p_info->sequence->frame_period) );
p_sys->b_after_sequence_header = 1;
{
/* Intra-slice refresh. Simulate a blank I picture. */
msg_Dbg( p_dec, "intra-slice refresh stream" );
- vout_SynchroNewPicture( p_sys->p_synchro,
+ decoder_SynchroNewPicture( p_sys->p_synchro,
I_CODING_TYPE, 2, 0, 0, p_sys->i_current_rate,
p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
- vout_SynchroDecode( p_sys->p_synchro );
- vout_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
+ decoder_SynchroDecode( p_sys->p_synchro );
+ decoder_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
p_sys->b_slice_i = 1;
}
p_sys->b_after_sequence_header = 0;
/* If nb_fields == 1, it is a field picture, and it will be
* followed by another field picture for which we won't call
- * vout_SynchroNewPicture() because this would have other
+ * decoder_SynchroNewPicture() because this would have other
* problems, so we take it into account here.
* This kind of sucks, but I didn't think better. --Meuuh
*/
- vout_SynchroNewPicture( p_sys->p_synchro,
+ decoder_SynchroNewPicture( p_sys->p_synchro,
p_sys->p_info->current_picture->flags & PIC_MASK_CODING_TYPE,
p_sys->p_info->current_picture->nb_fields == 1 ? 2 :
p_sys->p_info->current_picture->nb_fields, i_pts, i_dts,
!(p_sys->b_slice_i
&& ((p_sys->p_info->current_picture->flags
& PIC_MASK_CODING_TYPE) == P_CODING_TYPE))
- && !vout_SynchroChoose( p_sys->p_synchro,
+ && !decoder_SynchroChoose( p_sys->p_synchro,
p_sys->p_info->current_picture->flags
& PIC_MASK_CODING_TYPE,
/*p_sys->p_vout->render_time*/ 0 /*FIXME*/,
{
mpeg2_skip( p_sys->p_mpeg2dec, 1 );
p_sys->b_skip = 1;
- vout_SynchroTrash( p_sys->p_synchro );
+ decoder_SynchroTrash( p_sys->p_synchro );
mpeg2_set_buf( p_sys->p_mpeg2dec, buf, NULL );
}
else
{
mpeg2_skip( p_sys->p_mpeg2dec, 0 );
p_sys->b_skip = 0;
- vout_SynchroDecode( p_sys->p_synchro );
+ decoder_SynchroDecode( p_sys->p_synchro );
if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
{
{
p_pic = (picture_t *)p_sys->p_info->display_fbuf->id;
- vout_SynchroEnd( p_sys->p_synchro,
+ decoder_SynchroEnd( p_sys->p_synchro,
p_sys->p_info->display_picture->flags
& PIC_MASK_CODING_TYPE,
p_sys->b_garbage_pic );
if ( p_sys->p_picture_to_destroy != p_pic )
{
- p_pic->date = vout_SynchroDate( p_sys->p_synchro );
+ p_pic->date = decoder_SynchroDate( p_sys->p_synchro );
}
else
{
( ( p_sys->p_info->current_picture->flags &
PIC_MASK_CODING_TYPE) != B_CODING_TYPE ) )
{
- if( p_sys->p_synchro ) vout_SynchroReset( p_sys->p_synchro );
+ if( p_sys->p_synchro ) decoder_SynchroReset( p_sys->p_synchro );
}
mpeg2_skip( p_sys->p_mpeg2dec, 1 );
p_sys->b_skip = 1;
if( p_sys->b_slice_i )
{
- vout_SynchroNewPicture( p_sys->p_synchro,
+ decoder_SynchroNewPicture( p_sys->p_synchro,
I_CODING_TYPE, 2, 0, 0, p_sys->i_current_rate,
p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
- vout_SynchroDecode( p_sys->p_synchro );
- vout_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
+ decoder_SynchroDecode( p_sys->p_synchro );
+ decoder_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
}
break;
}
decoder_t *p_dec = (decoder_t *)p_this;
decoder_sys_t *p_sys = p_dec->p_sys;
- if( p_sys->p_synchro ) vout_SynchroRelease( p_sys->p_synchro );
+ if( p_sys->p_synchro ) decoder_SynchroRelease( p_sys->p_synchro );
if( p_sys->p_mpeg2dec ) mpeg2_close( p_sys->p_mpeg2dec );
#include <vlc/vlc.h>
#include <vlc_vout.h>
#include <vlc_codec.h>
-#include <vlc_vout_synchro.h>
+#include <vlc_codec_synchro.h>
#include <unistd.h>
#include <mcheck.h>
/*
* Output properties
*/
- vout_synchro_t *p_synchro;
+ decoder_synchro_t *p_synchro;
int i_aspect;
mtime_t i_last_frame_pts;
p_sys->p_info->sequence &&
p_sys->p_info->sequence->width != (unsigned int)-1 )
{
- vout_SynchroReset( p_sys->p_synchro );
+ decoder_SynchroReset( p_sys->p_synchro );
if( p_sys->p_info->current_fbuf != NULL
&& p_sys->p_info->current_fbuf->id != NULL )
{
if ( p_sys->b_slice_i )
{
- vout_SynchroNewPicture( p_sys->p_synchro,
+ decoder_SynchroNewPicture( p_sys->p_synchro,
I_CODING_TYPE, 2, 0, 0, p_sys->i_current_rate,
p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
- vout_SynchroDecode( p_sys->p_synchro );
- vout_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
+ decoder_SynchroDecode( p_sys->p_synchro );
+ decoder_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
}
}
if( p_sys->p_synchro )
{
- vout_SynchroRelease( p_sys->p_synchro );
+ decoder_SynchroRelease( p_sys->p_synchro );
}
- p_sys->p_synchro = vout_SynchroInit( p_dec,
+ p_sys->p_synchro = decoder_SynchroInit( p_dec,
(uint32_t)((uint64_t)1001000000 * 27 /
p_sys->p_info->sequence->frame_period) );
p_sys->b_after_sequence_header = 1;
break;
case STATE_PICTURE_2ND:
- vout_SynchroNewPicture( p_sys->p_synchro,
+ decoder_SynchroNewPicture( p_sys->p_synchro,
p_sys->p_info->current_picture->flags & PIC_MASK_CODING_TYPE,
p_sys->p_info->current_picture->nb_fields,
0, 0, p_sys->i_current_rate,
if( p_sys->b_skip )
{
- vout_SynchroTrash( p_sys->p_synchro );
+ decoder_SynchroTrash( p_sys->p_synchro );
}
else
{
- vout_SynchroDecode( p_sys->p_synchro );
+ decoder_SynchroDecode( p_sys->p_synchro );
}
break;
{
/* Intra-slice refresh. Simulate a blank I picture. */
msg_Dbg( p_dec, "intra-slice refresh stream" );
- vout_SynchroNewPicture( p_sys->p_synchro,
+ decoder_SynchroNewPicture( p_sys->p_synchro,
I_CODING_TYPE, 2, 0, 0, p_sys->i_current_rate,
p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
- vout_SynchroDecode( p_sys->p_synchro );
- vout_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
+ decoder_SynchroDecode( p_sys->p_synchro );
+ decoder_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
p_sys->b_slice_i = 1;
}
p_sys->b_after_sequence_header = 0;
p_block->i_pts = p_block->i_dts = 0;
/* End hack */
- vout_SynchroNewPicture( p_sys->p_synchro,
+ decoder_SynchroNewPicture( p_sys->p_synchro,
p_sys->p_info->current_picture->flags & PIC_MASK_CODING_TYPE,
p_sys->p_info->current_picture->nb_fields, i_pts,
0, p_sys->i_current_rate,
if ( !(p_sys->b_slice_i
&& ((p_sys->p_info->current_picture->flags
& PIC_MASK_CODING_TYPE) == P_CODING_TYPE))
- && !vout_SynchroChoose( p_sys->p_synchro,
+ && !decoder_SynchroChoose( p_sys->p_synchro,
p_sys->p_info->current_picture->flags
& PIC_MASK_CODING_TYPE,
/*FindVout(p_dec)->render_time*/ 0 /*FIXME*/,
{
mpeg2_skip( p_sys->p_mpeg2dec, 1 );
p_sys->b_skip = 1;
- vout_SynchroTrash( p_sys->p_synchro );
+ decoder_SynchroTrash( p_sys->p_synchro );
mpeg2_set_buf( p_sys->p_mpeg2dec, buf, NULL );
}
else
{
mpeg2_skip( p_sys->p_mpeg2dec, 0 );
p_sys->b_skip = 0;
- vout_SynchroDecode( p_sys->p_synchro );
+ decoder_SynchroDecode( p_sys->p_synchro );
if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
{
{
p_pic = (picture_t *)p_sys->p_info->display_fbuf->id;
- vout_SynchroEnd( p_sys->p_synchro,
+ decoder_SynchroEnd( p_sys->p_synchro,
p_sys->p_info->display_picture->flags
& PIC_MASK_CODING_TYPE,
p_sys->b_garbage_pic );
if ( p_sys->p_picture_to_destroy != p_pic )
{
- p_pic->date = vout_SynchroDate( p_sys->p_synchro );
+ p_pic->date = decoder_SynchroDate( p_sys->p_synchro );
}
else
{
( ( p_sys->p_info->current_picture->flags &
PIC_MASK_CODING_TYPE) != B_CODING_TYPE ) )
{
- if( p_sys->p_synchro ) vout_SynchroReset( p_sys->p_synchro );
+ if( p_sys->p_synchro ) decoder_SynchroReset( p_sys->p_synchro );
}
mpeg2_skip( p_sys->p_mpeg2dec, 1 );
p_sys->b_skip = 1;
if( p_sys->b_slice_i )
{
- vout_SynchroNewPicture( p_sys->p_synchro,
+ decoder_SynchroNewPicture( p_sys->p_synchro,
I_CODING_TYPE, 2, 0, 0, p_sys->i_current_rate,
p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
- vout_SynchroDecode( p_sys->p_synchro );
- vout_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
+ decoder_SynchroDecode( p_sys->p_synchro );
+ decoder_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
}
break;
}
decoder_sys_t *p_sys = p_dec->p_sys;
FILE *f_wd_dec;
- if( p_sys->p_synchro ) vout_SynchroRelease( p_sys->p_synchro );
+ if( p_sys->p_synchro ) decoder_SynchroRelease( p_sys->p_synchro );
if( p_sys->p_mpeg2dec ) mpeg2_close( p_sys->p_mpeg2dec );
f_wd_dec = fopen("/vlc/dec_pid", "w");
../include/vlc_block_helper.h \
../include/vlc_charset.h \
../include/vlc_codec.h \
+ ../include/vlc_codec_synchro.h \
../include/vlc_codecs.h \
../include/vlc_common.h \
../include/vlc_config.h \
../include/vlc_vlm.h \
../include/vlc_vod.h \
../include/vlc_vout.h \
- ../include/vlc_vout_synchro.h \
../include/vlc_xml.h \
$(NULL)
input/clock.c \
input/control.c \
input/decoder.c \
+ input/decoder_synchro.c \
input/demux.c \
input/es_out.c \
input/input.c \
video_output/video_text.c \
video_output/video_widgets.c \
video_output/vout_subpictures.c \
- video_output/vout_synchro.c \
video_output/vout_intf.c \
audio_output/aout_internal.h \
audio_output/common.c \
--- /dev/null
+/*****************************************************************************
+ * decoder_synchro.c : frame dropping routines
+ *****************************************************************************
+ * Copyright (C) 1999-2005 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Christophe Massiot <massiot@via.ecp.fr>
+ * Samuel Hocevar <sam@via.ecp.fr>
+ * Jean-Marc Dressler <polux@via.ecp.fr>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, 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 <vlc/vlc.h>
+#include <vlc_input.h>
+#include <vlc_codec_synchro.h>
+
+/*
+ * Local prototypes
+ */
+
+#define MAX_PIC_AVERAGE 8
+
+struct decoder_synchro_t
+{
+ VLC_COMMON_MEMBERS
+
+ int i_frame_rate;
+ int i_current_rate;
+ vlc_bool_t b_no_skip;
+ vlc_bool_t b_quiet;
+
+ /* date of the beginning of the decoding of the current picture */
+ mtime_t decoding_start;
+
+ /* stream properties */
+ unsigned int i_n_p, i_n_b;
+
+ /* decoding values */
+ mtime_t p_tau[4]; /* average decoding durations */
+ unsigned int pi_meaningful[4]; /* number of durations read */
+
+ /* render_time filled by SynchroChoose() */
+ int i_render_time;
+
+ /* stream context */
+ int i_nb_ref; /* Number of reference pictures */
+ int i_dec_nb_ref; /* Number of reference pictures we'll *
+ * have if we decode the current pic */
+ int i_trash_nb_ref; /* Number of reference pictures we'll *
+ * have if we trash the current pic */
+ unsigned int i_eta_p, i_eta_b;
+ mtime_t backward_pts, current_pts;
+ int i_current_period; /* period to add to the next picture */
+ int i_backward_period; /* period to add after the next
+ * reference picture
+ * (backward_period * period / 2) */
+
+ /* statistics */
+ unsigned int i_trashed_pic, i_not_chosen_pic, i_pic;
+};
+
+/* Error margins */
+#define DELTA (int)(0.075*CLOCK_FREQ)
+#define MAX_VALID_TAU (int)(0.3*CLOCK_FREQ)
+
+#define DEFAULT_NB_P 5
+#define DEFAULT_NB_B 1
+
+/*****************************************************************************
+ * decoder_SynchroInit : You know what ?
+ *****************************************************************************/
+decoder_synchro_t * decoder_SynchroInit( decoder_t *p_dec,
+ int i_frame_rate )
+{
+ decoder_synchro_t * p_synchro = vlc_object_create( p_dec,
+ sizeof(decoder_synchro_t) );
+ if ( p_synchro == NULL )
+ {
+ msg_Err( p_dec, "out of memory" );
+ return NULL;
+ }
+ vlc_object_attach( p_synchro, p_dec );
+
+ p_synchro->b_no_skip = !config_GetInt( p_dec, "skip-frames" );
+ p_synchro->b_quiet = config_GetInt( p_dec, "quiet-synchro" );
+
+ /* 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->i_trash_nb_ref = p_synchro->i_dec_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;
+
+ return p_synchro;
+}
+
+/*****************************************************************************
+ * decoder_SynchroRelease : You know what ?
+ *****************************************************************************/
+void decoder_SynchroRelease( decoder_synchro_t * p_synchro )
+{
+ vlc_object_detach( p_synchro );
+ vlc_object_destroy( p_synchro );
+}
+
+/*****************************************************************************
+ * decoder_SynchroReset : Reset the reference picture counter
+ *****************************************************************************/
+void decoder_SynchroReset( decoder_synchro_t * p_synchro )
+{
+ p_synchro->i_nb_ref = 0;
+ p_synchro->i_trash_nb_ref = p_synchro->i_dec_nb_ref = 0;
+}
+
+/*****************************************************************************
+ * decoder_SynchroChoose : Decide whether we will decode a picture or not
+ *****************************************************************************/
+vlc_bool_t decoder_SynchroChoose( decoder_synchro_t * p_synchro, int i_coding_type,
+ int i_render_time, vlc_bool_t b_low_delay )
+{
+#define TAU_PRIME( coding_type ) (p_synchro->p_tau[(coding_type)] \
+ + (p_synchro->p_tau[(coding_type)] >> 1) \
+ + p_synchro->i_render_time)
+#define S (*p_synchro)
+ mtime_t now, period;
+ mtime_t pts = 0;
+ vlc_bool_t b_decode = 0;
+
+ if ( p_synchro->b_no_skip )
+ return 1;
+
+ now = mdate();
+ period = 1000000 * 1001 / p_synchro->i_frame_rate
+ * p_synchro->i_current_rate / INPUT_RATE_DEFAULT;
+
+ p_synchro->i_render_time = i_render_time;
+
+ switch( i_coding_type )
+ {
+ case I_CODING_TYPE:
+ if( b_low_delay )
+ {
+ pts = S.current_pts;
+ }
+ else 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 && !p_synchro->b_quiet )
+ {
+ msg_Warn( p_synchro,
+ "synchro trashing I ("I64Fd")", pts - now );
+ }
+ break;
+
+ case P_CODING_TYPE:
+ if( b_low_delay )
+ {
+ pts = S.current_pts;
+ }
+ else 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;
+ }
+ 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
+}
+
+/*****************************************************************************
+ * decoder_SynchroTrash : Update counters when we trash a picture
+ *****************************************************************************/
+void decoder_SynchroTrash( decoder_synchro_t * p_synchro )
+{
+ p_synchro->i_trashed_pic++;
+ p_synchro->i_nb_ref = p_synchro->i_trash_nb_ref;
+}
+
+/*****************************************************************************
+ * decoder_SynchroDecode : Update timers when we decide to decode a picture
+ *****************************************************************************/
+void decoder_SynchroDecode( decoder_synchro_t * p_synchro )
+{
+ p_synchro->decoding_start = mdate();
+ p_synchro->i_nb_ref = p_synchro->i_dec_nb_ref;
+}
+
+/*****************************************************************************
+ * decoder_SynchroEnd : Called when the image is totally decoded
+ *****************************************************************************/
+void decoder_SynchroEnd( decoder_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]
+ && tau < MAX_VALID_TAU ) )
+ {
+ /* 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]++;
+ }
+ }
+ }
+}
+
+/*****************************************************************************
+ * decoder_SynchroDate : When an image has been decoded, ask for its date
+ *****************************************************************************/
+mtime_t decoder_SynchroDate( decoder_synchro_t * p_synchro )
+{
+ /* No need to lock, since PTS are only used by the video parser. */
+ return p_synchro->current_pts;
+}
+
+/*****************************************************************************
+ * decoder_SynchroNewPicture: Update stream structure and PTS
+ *****************************************************************************/
+void decoder_SynchroNewPicture( decoder_synchro_t * p_synchro, int i_coding_type,
+ int i_repeat_field, mtime_t next_pts,
+ mtime_t next_dts, int i_current_rate,
+ vlc_bool_t b_low_delay )
+{
+ mtime_t period = 1000000 * 1001 / p_synchro->i_frame_rate
+ * i_current_rate / INPUT_RATE_DEFAULT;
+#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
+ if( !p_synchro->b_quiet )
+ 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;
+ p_synchro->i_trash_nb_ref = 0;
+ if( p_synchro->i_nb_ref < 2 )
+ p_synchro->i_dec_nb_ref = p_synchro->i_nb_ref + 1;
+ else
+ p_synchro->i_dec_nb_ref = p_synchro->i_nb_ref;
+
+#if 0
+ if( !p_synchro->b_quiet )
+ 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->i_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 )
+ {
+ if( !p_synchro->b_quiet && p_synchro->i_trashed_pic != 0 )
+ 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 )
+ {
+#if 0
+ if( !p_synchro->b_quiet )
+ msg_Dbg( p_synchro,
+ "stream periodicity changed from B[%d] to B[%d]",
+ p_synchro->i_n_b, p_synchro->i_eta_b );
+#endif
+ p_synchro->i_n_b = p_synchro->i_eta_b;
+ }
+ p_synchro->i_eta_b = 0;
+ p_synchro->i_dec_nb_ref = 2;
+ p_synchro->i_trash_nb_ref = 0;
+ break;
+
+ case B_CODING_TYPE:
+ p_synchro->i_eta_b++;
+ p_synchro->i_dec_nb_ref = p_synchro->i_trash_nb_ref
+ = p_synchro->i_nb_ref;
+ break;
+ }
+
+ p_synchro->current_pts += p_synchro->i_current_period
+ * (period >> 1);
+
+#define PTS_THRESHOLD (period >> 2)
+ if( i_coding_type == B_CODING_TYPE || b_low_delay )
+ {
+ /* 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) && !p_synchro->b_quiet )
+ {
+ msg_Warn( p_synchro, "decoder 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) && !p_synchro->b_quiet )
+ {
+ 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) && !p_synchro->b_quiet )
+ {
+ 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) && !p_synchro->b_quiet )
+ {
+ 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. */
+ if( !p_synchro->b_quiet )
+ 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++;
+}
+++ /dev/null
-/*****************************************************************************
- * vout_synchro.c : frame dropping routines
- *****************************************************************************
- * Copyright (C) 1999-2005 the VideoLAN team
- * $Id$
- *
- * Authors: Christophe Massiot <massiot@via.ecp.fr>
- * Samuel Hocevar <sam@via.ecp.fr>
- * Jean-Marc Dressler <polux@via.ecp.fr>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, 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 <vlc/vlc.h>
-#include <vlc_vout.h>
-#include <vlc_input.h>
-#include <vlc_vout_synchro.h>
-
-/*
- * Local prototypes
- */
-
-#define MAX_PIC_AVERAGE 8
-
-struct vout_synchro_t
-{
- VLC_COMMON_MEMBERS
-
- int i_frame_rate;
- int i_current_rate;
- vlc_bool_t b_no_skip;
- vlc_bool_t b_quiet;
-
- /* date of the beginning of the decoding of the current picture */
- mtime_t decoding_start;
-
- /* stream properties */
- unsigned int i_n_p, i_n_b;
-
- /* decoding values */
- mtime_t p_tau[4]; /* average decoding durations */
- unsigned int pi_meaningful[4]; /* number of durations read */
-
- /* render_time filled by SynchroChoose() */
- int i_render_time;
-
- /* stream context */
- int i_nb_ref; /* Number of reference pictures */
- int i_dec_nb_ref; /* Number of reference pictures we'll *
- * have if we decode the current pic */
- int i_trash_nb_ref; /* Number of reference pictures we'll *
- * have if we trash the current pic */
- unsigned int i_eta_p, i_eta_b;
- mtime_t backward_pts, current_pts;
- int i_current_period; /* period to add to the next picture */
- int i_backward_period; /* period to add after the next
- * reference picture
- * (backward_period * period / 2) */
-
- /* statistics */
- unsigned int i_trashed_pic, i_not_chosen_pic, i_pic;
-};
-
-/* Error margins */
-#define DELTA (int)(0.075*CLOCK_FREQ)
-#define MAX_VALID_TAU (int)(0.3*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,
- 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_object );
-
- p_synchro->b_no_skip = !config_GetInt( p_object, "skip-frames" );
- p_synchro->b_quiet = config_GetInt( p_object, "quiet-synchro" );
-
- /* 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->i_trash_nb_ref = p_synchro->i_dec_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;
-
- 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;
- p_synchro->i_trash_nb_ref = p_synchro->i_dec_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,
- int i_render_time, vlc_bool_t b_low_delay )
-{
-#define TAU_PRIME( coding_type ) (p_synchro->p_tau[(coding_type)] \
- + (p_synchro->p_tau[(coding_type)] >> 1) \
- + p_synchro->i_render_time)
-#define S (*p_synchro)
- mtime_t now, period;
- mtime_t pts = 0;
- vlc_bool_t b_decode = 0;
-
- if ( p_synchro->b_no_skip )
- return 1;
-
- now = mdate();
- period = 1000000 * 1001 / p_synchro->i_frame_rate
- * p_synchro->i_current_rate / INPUT_RATE_DEFAULT;
-
- p_synchro->i_render_time = i_render_time;
-
- switch( i_coding_type )
- {
- case I_CODING_TYPE:
- if( b_low_delay )
- {
- pts = S.current_pts;
- }
- else 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 && !p_synchro->b_quiet )
- {
- msg_Warn( p_synchro,
- "synchro trashing I ("I64Fd")", pts - now );
- }
- break;
-
- case P_CODING_TYPE:
- if( b_low_delay )
- {
- pts = S.current_pts;
- }
- else 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;
- }
- 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++;
- p_synchro->i_nb_ref = p_synchro->i_trash_nb_ref;
-}
-
-/*****************************************************************************
- * vout_SynchroDecode : Update timers when we decide to decode a picture
- *****************************************************************************/
-void vout_SynchroDecode( vout_synchro_t * p_synchro )
-{
- p_synchro->decoding_start = mdate();
- p_synchro->i_nb_ref = p_synchro->i_dec_nb_ref;
-}
-
-/*****************************************************************************
- * 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]
- && tau < MAX_VALID_TAU ) )
- {
- /* 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,
- vlc_bool_t b_low_delay )
-{
- mtime_t period = 1000000 * 1001 / p_synchro->i_frame_rate
- * i_current_rate / INPUT_RATE_DEFAULT;
-#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
- if( !p_synchro->b_quiet )
- 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;
- p_synchro->i_trash_nb_ref = 0;
- if( p_synchro->i_nb_ref < 2 )
- p_synchro->i_dec_nb_ref = p_synchro->i_nb_ref + 1;
- else
- p_synchro->i_dec_nb_ref = p_synchro->i_nb_ref;
-
-#if 0
- if( !p_synchro->b_quiet )
- 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->i_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 )
- {
- if( !p_synchro->b_quiet && p_synchro->i_trashed_pic != 0 )
- 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 )
- {
-#if 0
- if( !p_synchro->b_quiet )
- msg_Dbg( p_synchro,
- "stream periodicity changed from B[%d] to B[%d]",
- p_synchro->i_n_b, p_synchro->i_eta_b );
-#endif
- p_synchro->i_n_b = p_synchro->i_eta_b;
- }
- p_synchro->i_eta_b = 0;
- p_synchro->i_dec_nb_ref = 2;
- p_synchro->i_trash_nb_ref = 0;
- break;
-
- case B_CODING_TYPE:
- p_synchro->i_eta_b++;
- p_synchro->i_dec_nb_ref = p_synchro->i_trash_nb_ref
- = p_synchro->i_nb_ref;
- break;
- }
-
- p_synchro->current_pts += p_synchro->i_current_period
- * (period >> 1);
-
-#define PTS_THRESHOLD (period >> 2)
- if( i_coding_type == B_CODING_TYPE || b_low_delay )
- {
- /* 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) && !p_synchro->b_quiet )
- {
- 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) && !p_synchro->b_quiet )
- {
- 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) && !p_synchro->b_quiet )
- {
- 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) && !p_synchro->b_quiet )
- {
- 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. */
- if( !p_synchro->b_quiet )
- 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++;
-}