/*****************************************************************************
- * vpar_motion.c : motion vectors parsing
- * (c)1999 VideoLAN
+ * vpar_synchro.c : frame dropping routines
+ *****************************************************************************
+ * Copyright (C) 1999, 2000 VideoLAN
+ * $Id: vpar_synchro.c,v 1.78 2001/01/18 05:13:23 sam 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.
+ *
+ * FIXME: write a few words about stream structure changes.
+ *
+ * 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 <errno.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include <sys/uio.h>
+#include "defs.h"
#include "config.h"
#include "common.h"
+#include "threads.h"
#include "mtime.h"
-#include "vlc_thread.h"
+#include "plugins.h"
#include "intf_msg.h"
-#include "debug.h" /* ?? temporaire, requis par netlist.h */
-#include "input.h"
-#include "input_netlist.h"
-#include "decoder_fifo.h"
+#include "stream_control.h"
+#include "input_ext-dec.h"
+
#include "video.h"
#include "video_output.h"
-#include "vdec_idct.h"
#include "video_decoder.h"
#include "vdec_motion.h"
+#include "../video_decoder/vdec_idct.h"
#include "vpar_blocks.h"
-#include "vpar_headers.h"
-#include "vpar_synchro.h"
-#include "video_parser.h"
-#include "video_fifo.h"
+#include "../video_decoder/vpar_headers.h"
+#include "../video_decoder/vpar_synchro.h"
+#include "../video_decoder/video_parser.h"
-#define MAX_COUNT 3
+#include "main.h"
/*
* Local prototypes
*/
+static int SynchroType( void );
+
+/* Error margins */
+#define DELTA (int)(0.040*CLOCK_FREQ)
+
+#define DEFAULT_NB_P 5
+#define DEFAULT_NB_B 1
/*****************************************************************************
- * vpar_SynchroUpdateTab : Update a mean table in the synchro structure
+ * vpar_SynchroInit : You know what ?
*****************************************************************************/
-float vpar_SynchroUpdateTab( video_synchro_tab_t * tab, int count )
+void vpar_SynchroInit( vpar_thread_t * p_vpar )
{
-
- tab->mean = ( tab->mean + MAX_COUNT * count ) / ( MAX_COUNT + 1 );
- tab->deviation = ( tab->deviation + MAX_COUNT * abs (tab->mean - count) )
- / ( MAX_COUNT + 1 );
-
- return tab->deviation;
+ p_vpar->synchro.i_type = SynchroType();
+ p_vpar->synchro.i_start = p_vpar->synchro.i_end = 0;
+ vlc_mutex_init( &p_vpar->synchro.fifo_lock );
+
+ /* We use a fake stream pattern, which is often right. */
+ p_vpar->synchro.i_n_p = p_vpar->synchro.i_eta_p = DEFAULT_NB_P;
+ p_vpar->synchro.i_n_b = p_vpar->synchro.i_eta_b = DEFAULT_NB_B;
+ memset( p_vpar->synchro.p_tau, 0, 4 * sizeof(mtime_t) );
+ memset( p_vpar->synchro.pi_meaningful, 0, 4 * sizeof(unsigned int) );
+ p_vpar->synchro.b_dropped_last = 0;
+ p_vpar->synchro.current_pts = mdate() + DEFAULT_PTS_DELAY;
+ p_vpar->synchro.backward_pts = 0;
+ p_vpar->synchro.i_current_period = p_vpar->synchro.i_backward_period = 0;
+#ifdef STATS
+ p_vpar->synchro.i_trashed_pic = p_vpar->synchro.i_not_chosen_pic =
+ p_vpar->synchro.i_pic = 0;
+#endif
}
/*****************************************************************************
- * vpar_SynchroUpdateStructures : Update the synchro structures
+ * vpar_SynchroChoose : Decide whether we will decode a picture or not
*****************************************************************************/
-void vpar_SynchroUpdateStructures( vpar_thread_t * p_vpar,
- int i_coding_type, int dropped )
+boolean_t vpar_SynchroChoose( vpar_thread_t * p_vpar, int i_coding_type,
+ int i_structure )
{
- float candidate_deviation;
- float optimal_deviation;
- float predict;
- mtime_t i_current_pts;
- mtime_t i_delay;
- mtime_t i_displaydate;
- decoder_fifo_t * decoder_fifo = p_vpar->bit_stream.p_decoder_fifo;
-
- /* interpolate the current _decode_ PTS */
- i_current_pts = decoder_fifo->buffer[decoder_fifo->i_start]->i_pts;
- if( !i_current_pts )
- {
- i_current_pts = p_vpar->synchro.i_last_decode_pts
- + 1000000.0 / (1 + p_vpar->synchro.actual_fps);
- }
- p_vpar->synchro.i_last_decode_pts = i_current_pts;
-
- /* see if the current image has a pts - if not, set to 0 */
- p_vpar->synchro.fifo[p_vpar->synchro.i_fifo_stop].i_pts
- = i_current_pts;
-
- /* update display time */
- i_displaydate = decoder_fifo->buffer[decoder_fifo->i_start]->i_pts;
- if( !i_displaydate || i_coding_type != I_CODING_TYPE )
- {
- if (!p_vpar->synchro.i_images_since_pts )
- p_vpar->synchro.i_images_since_pts = 10;
-
- i_displaydate = p_vpar->synchro.i_last_display_pts
- + 1000000.0 / (p_vpar->synchro.theorical_fps);
- //fprintf (stderr, " ");
- }
-
- /* else fprintf (stderr, "R ");
- if (dropped) fprintf (stderr, " "); else fprintf (stderr, "* ");
- fprintf (stderr, "%i ", i_coding_type);
- fprintf (stderr, "pts %lli delta %lli\n", i_displaydate, i_displaydate - p_vpar->synchro.i_last_display_pts); */
-
- p_vpar->synchro.i_images_since_pts--;
- p_vpar->synchro.i_last_display_pts = i_displaydate;
-
+ /* For clarity reasons, we separated the special synchros code from the
+ * mathematical synchro */
-
- /* update structures */
- switch(i_coding_type)
+ if( p_vpar->synchro.i_type != VPAR_SYNCHRO_DEFAULT )
{
- case P_CODING_TYPE:
-
- p_vpar->synchro.current_p_count++;
- if( !dropped ) p_vpar->synchro.nondropped_p_count++;
- break;
-
- case B_CODING_TYPE:
- p_vpar->synchro.current_b_count++;
- if( !dropped ) p_vpar->synchro.nondropped_b_count++;
- break;
-
+ switch( i_coding_type )
+ {
case I_CODING_TYPE:
+ /* I, IP, IP+, IPB */
+ if( p_vpar->synchro.i_type == VPAR_SYNCHRO_Iplus )
+ {
+ p_vpar->synchro.b_dropped_last = 1;
+ }
+ return( 1 );
- /* update information about images we can decode */
- if (i_current_pts != p_vpar->synchro.i_last_i_pts)
+ case P_CODING_TYPE:
+ if( p_vpar->synchro.i_type == VPAR_SYNCHRO_I ) /* I */
{
- if ( p_vpar->synchro.i_last_i_pts && i_current_pts != p_vpar->synchro.i_last_i_pts)
- {
- p_vpar->synchro.theorical_fps = (p_vpar->synchro.theorical_fps + 1000000.0 * (1 + p_vpar->synchro.current_b_count + p_vpar->synchro.current_p_count) / (i_current_pts - p_vpar->synchro.i_last_i_pts)) / 2;
- }
- p_vpar->synchro.i_last_i_pts = i_current_pts;
+ return( 0 );
}
- if( !dropped )
+ if( p_vpar->synchro.i_type == VPAR_SYNCHRO_Iplus ) /* I+ */
{
- if ( p_vpar->synchro.i_last_nondropped_i_pts && i_current_pts != p_vpar->synchro.i_last_nondropped_i_pts)
+ if( p_vpar->synchro.b_dropped_last )
+ {
+ p_vpar->synchro.b_dropped_last = 0;
+ return( 1 );
+ }
+ else
{
- p_vpar->synchro.actual_fps = (p_vpar->synchro.actual_fps + 1000000.0 * (1 + p_vpar->synchro.nondropped_b_count + p_vpar->synchro.nondropped_p_count) / (i_current_pts - p_vpar->synchro.i_last_nondropped_i_pts)) / 2;
+ return( 0 );
}
-
}
+ return( 1 ); /* IP, IP+, IPB */
- /* update all the structures for P images */
-
- /* period == 1 */
- optimal_deviation = vpar_SynchroUpdateTab(
- &p_vpar->synchro.tab_p[0],
- p_vpar->synchro.current_p_count);
- predict = p_vpar->synchro.tab_p[0].mean;
-
- /* period == 2 */
- candidate_deviation = vpar_SynchroUpdateTab(
- &p_vpar->synchro.tab_p[1 + (p_vpar->synchro.modulo & 0x1)],
- p_vpar->synchro.current_p_count);
- if (candidate_deviation < optimal_deviation)
- {
- optimal_deviation = candidate_deviation;
- predict = p_vpar->synchro.tab_p[1 + (p_vpar->synchro.modulo & 0x1)].mean;
+ case B_CODING_TYPE:
+ if( p_vpar->synchro.i_type <= VPAR_SYNCHRO_IP ) /* I, IP */
+ {
+ return( 0 );
}
-
- /* period == 3 */
- candidate_deviation = vpar_SynchroUpdateTab(
- &p_vpar->synchro.tab_p[3 + (p_vpar->synchro.modulo % 3)],
- p_vpar->synchro.current_p_count);
- if (candidate_deviation < optimal_deviation)
- {
- optimal_deviation = candidate_deviation;
- predict = p_vpar->synchro.tab_p[1 + (p_vpar->synchro.modulo % 3)].mean;
+ else if( p_vpar->synchro.i_type == VPAR_SYNCHRO_IPB ) /* IPB */
+ {
+ return( 1 );
}
- p_vpar->synchro.p_count_predict = predict;
- p_vpar->synchro.current_p_count = 0;
+ p_vpar->synchro.b_dropped_last ^= 1; /* IP+ */
+ return( !p_vpar->synchro.b_dropped_last );
+ }
+ return( 0 ); /* never reached but gcc yells at me */
+ }
+ else
+ {
+#define TAU_PRIME( coding_type ) (p_vpar->synchro.p_tau[(coding_type)] \
+ + (p_vpar->synchro.p_tau[(coding_type)] >> 1) \
+ + tau_yuv)
+#define S p_vpar->synchro
+ /* VPAR_SYNCHRO_DEFAULT */
+ mtime_t now, pts, period, tau_yuv;
+ boolean_t b_decode = 0;
+#ifdef DEBUG_VPAR
+ char p_date[MSTRTIME_MAX_SIZE];
+#endif
+ now = mdate();
+ period = 1000000 * 1001 / p_vpar->sequence.i_frame_rate;
- /* update all the structures for B images */
+ vlc_mutex_lock( &p_vpar->p_vout->change_lock );
+ tau_yuv = p_vpar->p_vout->render_time;
+ vlc_mutex_unlock( &p_vpar->p_vout->change_lock );
- /* period == 1 */
- optimal_deviation = vpar_SynchroUpdateTab(
- &p_vpar->synchro.tab_b[0],
- p_vpar->synchro.current_b_count);
- predict = p_vpar->synchro.tab_b[0].mean;
+ vlc_mutex_lock( &p_vpar->synchro.fifo_lock );
- /* period == 2 */
- candidate_deviation = vpar_SynchroUpdateTab(
- &p_vpar->synchro.tab_b[1 + (p_vpar->synchro.modulo & 0x1)],
- p_vpar->synchro.current_b_count);
- if (candidate_deviation < optimal_deviation)
- {
- optimal_deviation = candidate_deviation;
- predict = p_vpar->synchro.tab_b[1 + (p_vpar->synchro.modulo & 0x1)].mean;
+ switch( i_coding_type )
+ {
+ case I_CODING_TYPE:
+ if( S.backward_pts )
+ {
+ pts = S.backward_pts;
}
-
- /* period == 3 */
- candidate_deviation = vpar_SynchroUpdateTab(
- &p_vpar->synchro.tab_b[3 + (p_vpar->synchro.modulo % 3)],
- p_vpar->synchro.current_b_count);
- if (candidate_deviation < optimal_deviation)
- {
- optimal_deviation = candidate_deviation;
- predict = p_vpar->synchro.tab_b[1 + (p_vpar->synchro.modulo % 3)].mean;
+ else
+ {
+ /* displaying order : B B P B B I
+ * ^ ^
+ * | +- current picture
+ * +- current PTS
+ */
+ pts = S.current_pts + period * (S.i_n_b + 2);
}
- p_vpar->synchro.b_count_predict = predict;
- p_vpar->synchro.current_b_count = 0;
-
- /* now we calculated all statistics, it's time to
- * decide what we have the time to display
- */
- i_delay = i_current_pts - p_vpar->synchro.i_last_nondropped_i_pts;
-
- p_vpar->synchro.can_display_i
- = ( p_vpar->synchro.i_mean_decode_time < i_delay );
-
- p_vpar->synchro.can_display_p
- = ( p_vpar->synchro.i_mean_decode_time
- * (1 + p_vpar->synchro.p_count_predict) < i_delay );
-
- if( !p_vpar->synchro.can_display_p )
+ if( (1 + S.i_n_p * (S.i_n_b + 1)) * period >
+ S.p_tau[I_CODING_TYPE] )
{
- p_vpar->synchro.displayable_p
- = -1 + i_delay / p_vpar->synchro.i_mean_decode_time;
- if( p_vpar->synchro.displayable_p < 0 )
- p_vpar->synchro.displayable_p = 0;
- }
- else
- p_vpar->synchro.displayable_p = 0;
-
- if( p_vpar->synchro.can_display_p
- && !(p_vpar->synchro.can_display_b
- = ( p_vpar->synchro.i_mean_decode_time
- * (1 + p_vpar->synchro.b_count_predict
- + p_vpar->synchro.p_count_predict)) < i_delay) )
- {
- p_vpar->synchro.displayable_b
- = -2.0 + i_delay / p_vpar->synchro.i_mean_decode_time
- - p_vpar->synchro.can_display_p;
+ b_decode = 1;
}
else
- p_vpar->synchro.displayable_b = 0;
-
-#if 0
- fprintf( stderr,
- "I %i P %i (%f) B %i (%f)\n",
- p_vpar->synchro.can_display_i,
- p_vpar->synchro.can_display_p,
- p_vpar->synchro.displayable_p,
- p_vpar->synchro.can_display_b,
- p_vpar->synchro.displayable_b );
-#endif
-
- /* update some values */
- if( !dropped )
{
- p_vpar->synchro.i_last_nondropped_i_pts = i_current_pts;
- p_vpar->synchro.nondropped_p_count = 0;
- p_vpar->synchro.nondropped_b_count = 0;
+ b_decode = (pts - now) > (TAU_PRIME(I_CODING_TYPE) + DELTA);
}
-
+ if( !b_decode )
+ intf_WarnMsg( 3, "vpar synchro warning: trashing I" );
break;
- }
-
- p_vpar->synchro.modulo++;
-
-}
-
-/*****************************************************************************
- * vpar_SynchroChoose : Decide whether we will decode a picture or not
- *****************************************************************************/
-boolean_t vpar_SynchroChoose( vpar_thread_t * p_vpar, int i_coding_type,
- int i_structure )
-{
- mtime_t i_delay = p_vpar->synchro.i_last_decode_pts - mdate();
-
- switch( i_coding_type )
- {
- case I_CODING_TYPE:
-
- return( p_vpar->synchro.can_display_i );
-
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_vpar->synchro.can_display_p )
- return( 1 );
-
- if( p_vpar->synchro.displayable_p * i_delay
- < p_vpar->synchro.i_mean_decode_time )
+ if( (1 + S.i_n_p * (S.i_n_b + 1)) * period >
+ S.p_tau[I_CODING_TYPE] )
{
- //fprintf( stderr, "trashed a P\n");
- return( 0 );
+ 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;
- p_vpar->synchro.displayable_p--;
- return( 1 );
-
case B_CODING_TYPE:
+ pts = S.current_pts;
- if( p_vpar->synchro.can_display_b )
- return( 1 );
-
- /* modulo & 0x3 is here to add some randomness */
- if( i_delay < (1 + (p_vpar->synchro.modulo & 0x3))
- * p_vpar->synchro.i_mean_decode_time )
+ if( (S.i_n_b + 1) * period > S.p_tau[P_CODING_TYPE] )
{
- //fprintf( stderr, "trashed a B\n");
- return( 0 );
+ b_decode = (pts - now) > (TAU_PRIME(B_CODING_TYPE) + DELTA);
}
-
- if( p_vpar->synchro.displayable_b <= 0 )
- return( 0 );
-
- p_vpar->synchro.displayable_b--;
- return( 1 );
+ else
+ {
+ b_decode = 0;
+ }
+ }
+
+ vlc_mutex_unlock( &p_vpar->synchro.fifo_lock );
+#ifdef DEBUG_VPAR
+ intf_DbgMsg("vpar synchro debug: %s picture scheduled for %s, %s (%lld)",
+ i_coding_type == B_CODING_TYPE ? "B" :
+ (i_coding_type == P_CODING_TYPE ? "P" : "I"),
+ mstrtime(p_date, pts), b_decode ? "decoding" : "trashed",
+ S.p_tau[i_coding_type]);
+#endif
+#ifdef STATS
+ if( !b_decode )
+ {
+ S.i_not_chosen_pic++;
+ }
+#endif
+ return( b_decode );
+#undef S
+#undef TAU_PRIME
}
-
- return( 0 );
-
}
/*****************************************************************************
- * vpar_SynchroTrash : Update timers when we trash a picture
+ * vpar_SynchroTrash : Update counters when we trash a picture
*****************************************************************************/
void vpar_SynchroTrash( vpar_thread_t * p_vpar, int i_coding_type,
int i_structure )
{
- vpar_SynchroUpdateStructures (p_vpar, i_coding_type, 1);
-
+#ifdef STATS
+ p_vpar->synchro.i_trashed_pic++;
+#endif
}
/*****************************************************************************
* vpar_SynchroDecode : Update timers when we decide to decode a picture
*****************************************************************************/
void vpar_SynchroDecode( vpar_thread_t * p_vpar, int i_coding_type,
- int i_structure )
+ int i_structure )
{
- vpar_SynchroUpdateStructures (p_vpar, i_coding_type, 0);
+ vlc_mutex_lock( &p_vpar->synchro.fifo_lock );
- p_vpar->synchro.fifo[p_vpar->synchro.i_fifo_stop].i_decode_date = mdate();
- p_vpar->synchro.fifo[p_vpar->synchro.i_fifo_stop].i_image_type
- = i_coding_type;
-
- p_vpar->synchro.i_fifo_stop = (p_vpar->synchro.i_fifo_stop + 1) & 0xf;
+ if( ((p_vpar->synchro.i_end + 1 - p_vpar->synchro.i_start)
+ % MAX_DECODING_PIC) )
+ {
+ p_vpar->synchro.p_date_fifo[p_vpar->synchro.i_end] = mdate();
+ p_vpar->synchro.pi_coding_types[p_vpar->synchro.i_end] = i_coding_type;
+ FIFO_INCREMENT( i_end );
+ }
+ else
+ {
+ /* FIFO full, panic() */
+ intf_ErrMsg("vpar error: synchro fifo full, estimations will be biased");
+ }
+ vlc_mutex_unlock( &p_vpar->synchro.fifo_lock );
}
/*****************************************************************************
* vpar_SynchroEnd : Called when the image is totally decoded
*****************************************************************************/
-void vpar_SynchroEnd( vpar_thread_t * p_vpar )
+void vpar_SynchroEnd( vpar_thread_t * p_vpar, int i_garbage )
{
- mtime_t i_decode_time;
+ mtime_t tau;
+ int i_coding_type;
- i_decode_time = (mdate() -
- p_vpar->synchro.fifo[p_vpar->synchro.i_fifo_start].i_decode_date)
- / (p_vpar->synchro.i_fifo_stop - p_vpar->synchro.i_fifo_start & 0x0f);
+ vlc_mutex_lock( &p_vpar->synchro.fifo_lock );
- p_vpar->synchro.i_mean_decode_time =
- ( 7 * p_vpar->synchro.i_mean_decode_time + i_decode_time ) / 8;
-
- /* fprintf (stderr,
- "decoding time was %lli\n",
- p_vpar->synchro.i_mean_decode_time); */
+ if (!i_garbage)
+ {
+ tau = mdate() - p_vpar->synchro.p_date_fifo[p_vpar->synchro.i_start];
+ i_coding_type = p_vpar->synchro.pi_coding_types[p_vpar->synchro.i_start];
+
+ /* Mean with average tau, to ensure stability. */
+ p_vpar->synchro.p_tau[i_coding_type] =
+ (p_vpar->synchro.pi_meaningful[i_coding_type]
+ * p_vpar->synchro.p_tau[i_coding_type] + tau)
+ / (p_vpar->synchro.pi_meaningful[i_coding_type] + 1);
+ if( p_vpar->synchro.pi_meaningful[i_coding_type] < MAX_PIC_AVERAGE )
+ {
+ p_vpar->synchro.pi_meaningful[i_coding_type]++;
+ }
+#ifdef DEBUG_VPAR
+ intf_DbgMsg("vpar synchro debug: finished decoding %s (%lld)",
+ i_coding_type == B_CODING_TYPE ? "B" :
+ (i_coding_type == P_CODING_TYPE ? "P" : "I"), tau);
+#endif
+ }
- p_vpar->synchro.i_fifo_start = (p_vpar->synchro.i_fifo_start + 1) & 0xf;
+ FIFO_INCREMENT( i_start );
+ vlc_mutex_unlock( &p_vpar->synchro.fifo_lock );
}
/*****************************************************************************
*****************************************************************************/
mtime_t vpar_SynchroDate( vpar_thread_t * p_vpar )
{
- mtime_t i_displaydate = p_vpar->synchro.i_last_display_pts;
-
-#if 0
- static mtime_t i_delta = 0;
-
- fprintf( stderr,
- "displaying type %i with delay %lli and delta %lli\n",
- p_vpar->synchro.fifo[p_vpar->synchro.i_fifo_start].i_image_type,
- i_displaydate - mdate(),
- i_displaydate - i_delta );
-
- fprintf (stderr,
- "theorical fps: %f - actual fps: %f \n",
- p_vpar->synchro.theorical_fps, p_vpar->synchro.actual_fps );
-
- i_delta = i_displaydate;
+ /* No need to lock, since PTS are only used by the video parser. */
+ return( p_vpar->synchro.current_pts );
+}
+
+/*****************************************************************************
+ * vpar_SynchroNewPicture: Update stream structure and PTS
+ *****************************************************************************/
+void vpar_SynchroNewPicture( vpar_thread_t * p_vpar, int i_coding_type,
+ int i_repeat_field )
+{
+ mtime_t period = 1000000 * 1001 / p_vpar->sequence.i_frame_rate;
+
+ switch( i_coding_type )
+ {
+ case I_CODING_TYPE:
+ if( p_vpar->synchro.i_eta_p
+ && p_vpar->synchro.i_eta_p != p_vpar->synchro.i_n_p )
+ {
+ intf_WarnMsg( 1, "Stream periodicity changed from P[%d] to P[%d]",
+ p_vpar->synchro.i_n_p, p_vpar->synchro.i_eta_p );
+ p_vpar->synchro.i_n_p = p_vpar->synchro.i_eta_p;
+ }
+ p_vpar->synchro.i_eta_p = p_vpar->synchro.i_eta_b = 0;
+#ifdef STATS
+ if( p_vpar->synchro.i_type == VPAR_SYNCHRO_DEFAULT )
+ {
+ intf_Msg( "vpar synchro stats: I(%lld) P(%lld)[%d] B(%lld)[%d] YUV(%lld) : trashed %d:%d/%d",
+ p_vpar->synchro.p_tau[I_CODING_TYPE],
+ p_vpar->synchro.p_tau[P_CODING_TYPE],
+ p_vpar->synchro.i_n_p,
+ p_vpar->synchro.p_tau[B_CODING_TYPE],
+ p_vpar->synchro.i_n_b,
+ p_vpar->p_vout->render_time,
+ p_vpar->synchro.i_not_chosen_pic,
+ p_vpar->synchro.i_trashed_pic -
+ p_vpar->synchro.i_not_chosen_pic,
+ p_vpar->synchro.i_pic );
+ p_vpar->synchro.i_trashed_pic = p_vpar->synchro.i_not_chosen_pic
+ = p_vpar->synchro.i_pic = 0;
+ }
#endif
+ break;
+ case P_CODING_TYPE:
+ p_vpar->synchro.i_eta_p++;
+ if( p_vpar->synchro.i_eta_b
+ && p_vpar->synchro.i_eta_b != p_vpar->synchro.i_n_b )
+ {
+ intf_WarnMsg( 1, "Stream periodicity changed from B[%d] to B[%d]",
+ p_vpar->synchro.i_n_b, p_vpar->synchro.i_eta_b );
+ p_vpar->synchro.i_n_b = p_vpar->synchro.i_eta_b;
+ }
+ p_vpar->synchro.i_eta_b = 0;
+ break;
+ case B_CODING_TYPE:
+ p_vpar->synchro.i_eta_b++;
+ break;
+ }
+
+ p_vpar->synchro.current_pts += p_vpar->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_vpar->synchro.i_current_period = i_repeat_field;
+
+ if( p_vpar->sequence.next_pts )
+ {
+ if( p_vpar->sequence.next_pts - p_vpar->synchro.current_pts
+ > PTS_THRESHOLD
+ || p_vpar->synchro.current_pts - p_vpar->sequence.next_pts
+ > PTS_THRESHOLD )
+ {
+ intf_WarnMsg( 2,
+ "vpar synchro warning: pts != current_date (%lld)",
+ p_vpar->synchro.current_pts
+ - p_vpar->sequence.next_pts );
+ }
+ p_vpar->synchro.current_pts = p_vpar->sequence.next_pts;
+ p_vpar->sequence.next_pts = 0;
+ }
+ }
+ else
+ {
+ p_vpar->synchro.i_current_period = p_vpar->synchro.i_backward_period;
+ p_vpar->synchro.i_backward_period = i_repeat_field;
+
+ if( p_vpar->synchro.backward_pts )
+ {
+ if( p_vpar->sequence.next_dts &&
+ (p_vpar->sequence.next_dts - p_vpar->synchro.backward_pts
+ > PTS_THRESHOLD
+ || p_vpar->synchro.backward_pts - p_vpar->sequence.next_dts
+ > PTS_THRESHOLD) )
+ {
+ intf_WarnMsg( 2,
+ "vpar synchro warning: backward_pts != dts (%lld)",
+ p_vpar->sequence.next_dts
+ - p_vpar->synchro.backward_pts );
+ }
+ if( p_vpar->synchro.backward_pts - p_vpar->synchro.current_pts
+ > PTS_THRESHOLD
+ || p_vpar->synchro.current_pts - p_vpar->synchro.backward_pts
+ > PTS_THRESHOLD )
+ {
+ intf_WarnMsg( 2,
+ "vpar synchro warning: backward_pts != current_pts (%lld)",
+ p_vpar->synchro.current_pts - p_vpar->synchro.backward_pts );
+ }
+ p_vpar->synchro.current_pts = p_vpar->synchro.backward_pts;
+ p_vpar->synchro.backward_pts = 0;
+ }
+ else if( p_vpar->sequence.next_dts )
+ {
+ if( p_vpar->sequence.next_dts - p_vpar->synchro.current_pts
+ > PTS_THRESHOLD
+ || p_vpar->synchro.current_pts - p_vpar->sequence.next_dts
+ > PTS_THRESHOLD )
+ {
+ intf_WarnMsg( 2,
+ "vpar synchro warning: dts != current_pts (%lld)",
+ p_vpar->synchro.current_pts
+ - p_vpar->sequence.next_dts );
+ }
+ /* By definition of a DTS. */
+ p_vpar->synchro.current_pts = p_vpar->sequence.next_dts;
+ p_vpar->sequence.next_dts = 0;
+ }
+
+ if( p_vpar->sequence.next_pts )
+ {
+ /* Store the PTS for the next time we have to date an I picture. */
+ p_vpar->synchro.backward_pts = p_vpar->sequence.next_pts;
+ p_vpar->sequence.next_pts = 0;
+ }
+ }
+#undef PTS_THRESHOLD
+
+#ifdef STATS
+ p_vpar->synchro.i_pic++;
+#endif
+}
+
+/*****************************************************************************
+ * SynchroType: Get the user's synchro type
+ *****************************************************************************
+ * This function is called at initialization.
+ *****************************************************************************/
+static int SynchroType( void )
+{
+ char * psz_synchro = main_GetPszVariable( VPAR_SYNCHRO_VAR, NULL );
+
+ if( psz_synchro == NULL )
+ {
+ return VPAR_SYNCHRO_DEFAULT;
+ }
+
+ switch( *psz_synchro++ )
+ {
+ case 'i':
+ case 'I':
+ switch( *psz_synchro++ )
+ {
+ case '\0':
+ return VPAR_SYNCHRO_I;
+
+ case '+':
+ if( *psz_synchro ) return 0;
+ return VPAR_SYNCHRO_Iplus;
+
+ case 'p':
+ case 'P':
+ switch( *psz_synchro++ )
+ {
+ case '\0':
+ return VPAR_SYNCHRO_IP;
+
+ case '+':
+ if( *psz_synchro ) return 0;
+ return VPAR_SYNCHRO_IPplus;
+
+ case 'b':
+ case 'B':
+ if( *psz_synchro ) return 0;
+ return VPAR_SYNCHRO_IPB;
+
+ default:
+ return VPAR_SYNCHRO_DEFAULT;
+
+ }
+
+ default:
+ return VPAR_SYNCHRO_DEFAULT;
+ }
+ }
- return i_displaydate;
+ return VPAR_SYNCHRO_DEFAULT;
}
projects / vlc / blobdiff