Commit ba8d1d4c authored by Sam Hocevar's avatar Sam Hocevar

. nouvelle synchro. �a devrait d�j� fonctionner correctement en monothread

parent 82c00619
......@@ -43,15 +43,12 @@ typedef struct video_synchro_s
/* mean decoding time */
mtime_t i_mean_decode_time;
/* tells whether we accumulated delay */
mtime_t i_delay;
/* dates */
mtime_t i_last_display_pts;
mtime_t i_last_decode_pts;
mtime_t i_last_i_pts;
mtime_t i_last_display_pts; /* pts of the last displayed image */
mtime_t i_last_decode_pts; /* pts of the last decoded image */
mtime_t i_last_i_pts; /* pts of the last I image */
mtime_t i_last_nondropped_i_pts; /* pts of last non-dropped I image */
unsigned int i_images_since_pts;
/* last pts of non-dropped I image */
mtime_t i_last_nondropped_i_pts;
/* il manquait un compteur */
unsigned int modulo;
......@@ -65,6 +62,13 @@ typedef struct video_synchro_s
unsigned int nondropped_b_count;
double b_count_predict;
/* can we display pictures ? */
unsigned int can_display_i;
unsigned int can_display_p;
double displayable_p;
unsigned int can_display_b;
double displayable_b;
/* 1 for linear count, 2 for binary count, 3 for ternary count */
video_synchro_tab_t tab_p[6];
video_synchro_tab_t tab_b[6];
......
......@@ -242,6 +242,7 @@ static int InitThread( vpar_thread_t *p_vpar )
vpar_InitCodedPattern( p_vpar );
vpar_InitDCTTables( p_vpar );
/*
* Initialize the synchro properties
*/
......@@ -260,8 +261,12 @@ static int InitThread( vpar_thread_t *p_vpar )
p_vpar->synchro.modulo = 0;
/* mean decoding time - at least 200 ms for a slow machine */
p_vpar->synchro.i_mean_decode_time = 200000;
/* suppose we have no delay */
p_vpar->synchro.i_delay = 0;
/* assume we can display all Is and 2 Ps */
p_vpar->synchro.can_display_i = 1;
p_vpar->synchro.can_display_p = 0;
p_vpar->synchro.displayable_p = 2;
p_vpar->synchro.can_display_b = 0;
p_vpar->synchro.displayable_b = 0;
/* assume there were about 3 P and 6 B images between I's */
p_vpar->synchro.current_p_count = 1;
p_vpar->synchro.nondropped_p_count = 1;
......@@ -273,7 +278,6 @@ static int InitThread( vpar_thread_t *p_vpar )
{
p_vpar->synchro.tab_p[i_dummy].mean = 3;
p_vpar->synchro.tab_p[i_dummy].deviation = .5;
p_vpar->synchro.tab_b[i_dummy].mean = 6;
p_vpar->synchro.tab_b[i_dummy].deviation = .5;
}
......
......@@ -66,6 +66,7 @@ void vpar_SynchroUpdateStructures( vpar_thread_t * p_vpar,
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;
......@@ -93,10 +94,11 @@ void vpar_SynchroUpdateStructures( vpar_thread_t * p_vpar,
+ 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);
/* 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;
......@@ -136,9 +138,6 @@ void vpar_SynchroUpdateStructures( vpar_thread_t * p_vpar,
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;
}
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;
}
......@@ -205,7 +204,61 @@ void vpar_SynchroUpdateStructures( vpar_thread_t * p_vpar,
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 )
{
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;
}
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;
}
break;
}
p_vpar->synchro.modulo++;
......@@ -218,41 +271,50 @@ void vpar_SynchroUpdateStructures( vpar_thread_t * p_vpar,
boolean_t vpar_SynchroChoose( vpar_thread_t * p_vpar, int i_coding_type,
int i_structure )
{
mtime_t i_delay;
int keep;
mtime_t i_delay = p_vpar->synchro.i_last_decode_pts - mdate();
i_delay = p_vpar->synchro.i_last_decode_pts - mdate();
//fprintf( stderr, "delay is %lli - ", i_delay);
#if 1
/*if ( i_coding_type == B_CODING_TYPE )
return (0);*/
//return( i_coding_type == I_CODING_TYPE || i_coding_type == P_CODING_TYPE );
if( i_delay > 120000 )
{
keep = 1;
}
else if( i_delay > 100000 )
switch( i_coding_type )
{
keep = ( i_coding_type == I_CODING_TYPE
|| i_coding_type == P_CODING_TYPE );
}
else if( i_delay > 50000 )
{
keep = ( i_coding_type == I_CODING_TYPE );
}
else
{
keep = 0;
}
#endif
case I_CODING_TYPE:
return( p_vpar->synchro.can_display_i );
case P_CODING_TYPE:
if( p_vpar->synchro.can_display_p )
return( 1 );
if( p_vpar->synchro.displayable_p * i_delay
< p_vpar->synchro.i_mean_decode_time )
{
//fprintf( stderr, "trashed a P\n");
return( 0 );
}
p_vpar->synchro.displayable_p--;
return( 1 );
case B_CODING_TYPE:
if( p_vpar->synchro.can_display_b )
return( 1 );
//if (!keep) fprintf( stderr, "trashing a type %i with delay %lli\n", i_coding_type, i_delay);
// else fprintf( stderr, "chooser : ok - displaying a %i \n", i_coding_type);
/* modulo & 0x3 is here to add some randomness */
if( i_delay < (1 + (p_vpar->synchro.modulo & 0x3))
* p_vpar->synchro.i_mean_decode_time )
{
//fprintf( stderr, "trashed a B\n");
return( 0 );
}
if( p_vpar->synchro.displayable_b <= 0 )
return( 0 );
p_vpar->synchro.displayable_b--;
return( 1 );
}
return (keep);
return( 0 );
}
......@@ -296,7 +358,9 @@ void vpar_SynchroEnd( vpar_thread_t * p_vpar )
p_vpar->synchro.i_mean_decode_time =
( 7 * p_vpar->synchro.i_mean_decode_time + i_decode_time ) / 8;
//fprintf (stderr, "decoding time is %lli\n", p_vpar->synchro.i_mean_decode_time);
/* fprintf (stderr,
"decoding time was %lli\n",
p_vpar->synchro.i_mean_decode_time); */
p_vpar->synchro.i_fifo_start = (p_vpar->synchro.i_fifo_start + 1) & 0xf;
......@@ -308,12 +372,23 @@ void vpar_SynchroEnd( vpar_thread_t * p_vpar )
mtime_t vpar_SynchroDate( vpar_thread_t * p_vpar )
{
mtime_t i_displaydate = p_vpar->synchro.i_last_display_pts;
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);
#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;
#endif
return i_displaydate;
}
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment