--- /dev/null
+/*****************************************************************************
+ * vout_synchro.h: frame-dropping structures
+ *****************************************************************************
+ * Copyright (C) 1999-2003 VideoLAN
+ * $Id: vout_synchro.h,v 1.1 2003/04/14 22:22:32 massiot Exp $
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * vout_synchro_t : timers for the video synchro
+ *****************************************************************************/
+#define MAX_PIC_AVERAGE 8
+
+/* Read the discussion on top of vout_synchro.c for more information. */
+struct vout_synchro_t
+{
+ VLC_COMMON_MEMBERS
+
+ vout_thread_t * p_vout;
+ int i_frame_rate;
+ int i_current_rate;
+
+ /* 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 */
+ /* and p_vout->render_time (read with p_vout->change_lock) */
+
+ /* stream context */
+ vlc_bool_t i_nb_ref; /* Number of reference pictures */
+ 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;
+};
+
+/* 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 */
+
+/* Structures */
+#define TOP_FIELD 1
+#define BOTTOM_FIELD 2
+#define FRAME_STRUCTURE 3
+
+/*****************************************************************************
+ * Prototypes
+ *****************************************************************************/
+#define vout_SynchroInit(a,b,c) __vout_SynchroInit(VLC_OBJECT(a),b,c)
+VLC_EXPORT( vout_synchro_t *, __vout_SynchroInit, ( vlc_object_t *, vout_thread_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 ) );
+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 ) );
+
* libmpeg2.c: mpeg2 video decoder module making use of libmpeg2.
*****************************************************************************
* Copyright (C) 1999-2001 VideoLAN
- * $Id: libmpeg2.c,v 1.8 2003/04/07 17:35:01 gbazin Exp $
+ * $Id: libmpeg2.c,v 1.9 2003/04/14 22:22:32 massiot Exp $
*
* Authors: Gildas Bazin <gbazin@netcourrier.com>
*
#include <mpeg2dec/mpeg2.h>
+#include "vout_synchro.h"
+
/* Aspect ratio (ISO/IEC 13818-2 section 6.3.3, table 6-3) */
#define AR_SQUARE_PICTURE 1 /* square pixels */
#define AR_3_4_PICTURE 2 /* 3:4 picture (TV) */
mtime_t i_previous_pts;
mtime_t i_current_pts;
mtime_t i_period_remainder;
+ int i_current_rate;
+ picture_t * p_picture_to_destroy;
/*
* Output properties
*/
vout_thread_t *p_vout;
+ vout_synchro_t *p_synchro;
} dec_thread_t;
p_fifo->pf_run = RunDecoder;
return VLC_SUCCESS;
}
+
/*****************************************************************************
* RunDecoder: the libmpeg2 decoder
*****************************************************************************/
p_dec->i_current_pts = 0;
p_dec->i_previous_pts = 0;
p_dec->i_period_remainder = 0;
+ p_dec->p_picture_to_destroy = NULL;
/* Initialize decoder */
p_dec->p_mpeg2dec = mpeg2_init();
break;
}
+ if( p_dec->p_pes->b_discontinuity )
+ {
+ vout_SynchroReset( p_dec->p_synchro );
+ if ( p_dec->p_info->current_fbuf != NULL )
+ p_dec->p_picture_to_destroy
+ = p_dec->p_info->current_fbuf->id;
+ }
+
if( p_dec->p_pes->i_pts )
{
mpeg2_pts( p_dec->p_mpeg2dec,
p_dec->i_previous_pts = p_dec->i_current_pts;
p_dec->i_current_pts = p_dec->p_pes->i_pts;
}
+
+ p_dec->i_current_rate = p_dec->p_pes->i_rate;
p_data = p_dec->p_pes->p_first;
}
{
/* Initialize video output */
uint8_t *buf[3];
+ buf[0] = buf[1] = buf[2] = NULL;
/* Check whether the input gives a particular aspect ratio */
if( p_dec->p_fifo->p_demux_data
mpeg2_custom_fbuf( p_dec->p_mpeg2dec, 1 );
/* Set the first 2 reference frames */
- if( (p_pic = GetNewPicture( p_dec, buf )) == NULL ) break;
- mpeg2_set_buf( p_dec->p_mpeg2dec, buf, p_pic );
- if( (p_pic = GetNewPicture( p_dec, buf )) == NULL ) break;
- mpeg2_set_buf( p_dec->p_mpeg2dec, buf, p_pic );
+ mpeg2_set_buf( p_dec->p_mpeg2dec, buf, NULL );
+ mpeg2_set_buf( p_dec->p_mpeg2dec, buf, NULL );
+
+ p_dec->p_synchro = vout_SynchroInit( p_dec->p_fifo, p_dec->p_vout,
+ 1000000 * 27 / p_dec->p_info->sequence->frame_period * 1001 );
}
break;
case STATE_PICTURE:
{
uint8_t *buf[3];
-
- if( (p_pic = GetNewPicture( p_dec, buf )) == NULL ) break;
- mpeg2_set_buf( p_dec->p_mpeg2dec, buf, p_pic );
-
- /* Store the date for the picture */
- if( p_dec->p_info->current_picture->flags & PIC_FLAG_PTS )
+ buf[0] = buf[1] = buf[2] = NULL;
+
+ vout_SynchroNewPicture( p_dec->p_synchro,
+ p_dec->p_info->current_picture->flags & PIC_MASK_CODING_TYPE,
+ p_dec->p_info->current_picture->nb_fields,
+ (p_dec->p_info->current_picture->flags & PIC_FLAG_PTS) ?
+ ( (p_dec->p_info->current_picture->pts ==
+ (uint32_t)p_dec->i_current_pts) ?
+ p_dec->i_current_pts : p_dec->i_previous_pts ) : 0,
+ 0,
+ p_dec->i_current_rate );
+
+ if ( !vout_SynchroChoose( p_dec->p_synchro,
+ p_dec->p_info->current_picture->flags & PIC_MASK_CODING_TYPE ) )
+ {
+ mpeg2_skip( p_dec->p_mpeg2dec, 1 );
+ vout_SynchroTrash( p_dec->p_synchro );
+ mpeg2_set_buf( p_dec->p_mpeg2dec, buf, NULL );
+ }
+ else
{
- p_pic->date = ( p_dec->p_info->current_picture->pts ==
- (uint32_t)p_dec->i_current_pts ) ?
- p_dec->i_current_pts : p_dec->i_previous_pts;
+ mpeg2_skip( p_dec->p_mpeg2dec, 0 );
+ vout_SynchroDecode( p_dec->p_synchro );
+ if( (p_pic = GetNewPicture( p_dec, buf )) == NULL ) break;
+ mpeg2_set_buf( p_dec->p_mpeg2dec, buf, p_pic );
}
}
- break;
+ /* pass-through */
case STATE_END:
- case STATE_SLICE:
if( p_dec->p_info->display_fbuf
&& p_dec->p_info->display_fbuf->id )
{
p_pic = (picture_t *)p_dec->p_info->display_fbuf->id;
- /* Date the new picture */
- if( p_dec->p_info->display_picture->flags & PIC_FLAG_PTS )
- {
- p_dec->i_pts = p_pic->date;
- p_dec->i_period_remainder = 0;
- }
- else
+ if ( p_pic != NULL )
{
- p_dec->i_pts += ( (p_dec->p_info->sequence->frame_period +
- p_dec->i_period_remainder) / 27 );
- p_dec->i_period_remainder =
- p_dec->p_info->sequence->frame_period +
- p_dec->i_period_remainder -
- ( p_dec->p_info->sequence->frame_period +
- p_dec->i_period_remainder ) / 27 * 27;
+ if ( p_dec->p_picture_to_destroy != p_pic )
+ {
+ vout_SynchroEnd( p_dec->p_synchro,
+ p_dec->p_info->display_picture->flags
+ & PIC_MASK_CODING_TYPE,
+ 0 );
+ vout_DatePicture( p_dec->p_vout, p_pic,
+ vout_SynchroDate( p_dec->p_synchro ) );
+ vout_DisplayPicture( p_dec->p_vout, p_pic );
+ }
+ else
+ {
+ p_dec->p_picture_to_destroy = NULL;
+ vout_SynchroEnd( p_dec->p_synchro,
+ p_dec->p_info->display_picture->flags
+ & PIC_MASK_CODING_TYPE,
+ 1 );
+ vout_DestroyPicture( p_dec->p_vout, p_pic );
+ }
}
- vout_DatePicture( p_dec->p_vout, p_pic, p_dec->i_pts );
-
- vout_DisplayPicture( p_dec->p_vout, p_pic );
-
- /* Handle pulldown by adding some delay to the pts of the next
- * picture. */
- if( p_dec->p_info->display_picture->nb_fields > 2 )
+ if( p_dec->p_info->discard_fbuf &&
+ p_dec->p_info->discard_fbuf->id )
{
- int i_repeat_fields =
- p_dec->p_info->display_picture->nb_fields - 2;
-
- p_dec->i_pts += ( (p_dec->p_info->sequence->frame_period +
- p_dec->i_period_remainder)
- / 27 / 2 * i_repeat_fields );
- p_dec->i_period_remainder =
- p_dec->p_info->sequence->frame_period +
- p_dec->i_period_remainder -
- ( p_dec->p_info->sequence->frame_period +
- p_dec->i_period_remainder ) / 27 / 2 * 27 * 2;
+ vout_UnlinkPicture( p_dec->p_vout, p_pic );
}
}
break;
+ case STATE_INVALID:
+ msg_Warn( p_dec->p_fifo, "Received STATE_INVALID" );
+ break;
+
default:
break;
}
vout_Request( p_dec->p_fifo, p_dec->p_vout, 0, 0, 0, 0 );
}
+ if( p_dec->p_synchro )
+ vout_SynchroRelease( p_dec->p_synchro );
+
if( p_dec->p_mpeg2dec ) mpeg2_close( p_dec->p_mpeg2dec );
free( p_dec );
}
if( p_pic == NULL )
return NULL;
+ vout_LinkPicture( p_dec->p_vout, p_pic );
pp_buf[0] = p_pic->p[0].p_pixels;
pp_buf[1] = p_pic->p[1].p_pixels;
--- /dev/null
+/*****************************************************************************
+ * 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>
+ * 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., 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++;
+}
projects / vlc / commitdiff