/*****************************************************************************
* input_clock.c: Clock/System date convertions, stream management
*****************************************************************************
- * Copyright (C) 1999-2004 VideoLAN
+ * Copyright (C) 1999-2004 the VideoLAN team
* $Id$
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
* 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.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdlib.h>
-#include <vlc/vlc.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
-#include <vlc/input.h>
#include "input_internal.h"
/*
* in all the FIFOs, but it may be not enough.
*/
-/* p_input->i_cr_average : Maximum number of samples used to compute the
+/* p_input->p->i_cr_average : Maximum number of samples used to compute the
* dynamic average value.
* We use the following formula :
* new_average = (old_average * c_average + new_sample_value) / (c_average +1)
*****************************************************************************/
/* Maximum gap allowed between two CRs. */
-#define CR_MAX_GAP 2000000
+#define CR_MAX_GAP (INT64_C(2000000)*100/9)
/* Latency introduced on DVDs with CR == 0 on chapter change - this is from
* my dice --Meuuh */
/*****************************************************************************
* ClockToSysdate: converts a movie clock to system date
*****************************************************************************/
-static mtime_t ClockToSysdate( input_thread_t *p_input,
- input_clock_t *cl, mtime_t i_clock )
+static mtime_t ClockToSysdate( input_clock_t *cl, mtime_t i_clock )
{
- mtime_t i_sysdate = 0;
-
- if( cl->i_synchro_state == SYNCHRO_OK )
- {
- i_sysdate = (mtime_t)(i_clock - cl->cr_ref)
- * (mtime_t)p_input->i_rate
- * (mtime_t)300;
- i_sysdate /= 27;
- i_sysdate /= 1000;
- i_sysdate += (mtime_t)cl->sysdate_ref;
- }
+ if( cl->i_synchro_state != SYNCHRO_OK )
+ return 0;
- return( i_sysdate );
+ return (i_clock - cl->cr_ref) * cl->i_rate / INPUT_RATE_DEFAULT +
+ cl->sysdate_ref;
}
/*****************************************************************************
*****************************************************************************
* Caution : the synchro state must be SYNCHRO_OK for this to operate.
*****************************************************************************/
-static mtime_t ClockCurrent( input_thread_t *p_input,
- input_clock_t *cl )
+static mtime_t ClockCurrent( input_clock_t *cl )
{
- return( (mdate() - cl->sysdate_ref) * 27 * INPUT_RATE_DEFAULT
- / p_input->i_rate / 300
- + cl->cr_ref );
+ return (mdate() - cl->sysdate_ref) * INPUT_RATE_DEFAULT / cl->i_rate +
+ cl->cr_ref;
}
/*****************************************************************************
* input_ClockInit: reinitializes the clock reference after a stream
* discontinuity
*****************************************************************************/
-void input_ClockInit( input_clock_t *cl, vlc_bool_t b_master, int i_cr_average )
+void input_ClockInit( input_clock_t *cl, bool b_master, int i_cr_average, int i_rate )
{
cl->i_synchro_state = SYNCHRO_START;
cl->last_cr = 0;
cl->last_pts = 0;
+ cl->last_sysdate = 0;
cl->cr_ref = 0;
cl->sysdate_ref = 0;
cl->delta_cr = 0;
- cl->c_average_count = 0;
+ cl->i_delta_cr_residue = 0;
+ cl->i_rate = i_rate;
cl->i_cr_average = i_cr_average;
cl->b_master = b_master;
}
-#if 0
-/*****************************************************************************
- * input_ClockManageControl: handles the messages from the interface
- *****************************************************************************
- * Returns UNDEF_S if nothing happened, PAUSE_S if the stream was paused
- *****************************************************************************/
-int input_ClockManageControl( input_thread_t * p_input,
- input_clock_t *cl, mtime_t i_clock )
-{
-#if 0
- vlc_value_t val;
- int i_return_value = UNDEF_S;
-
- vlc_mutex_lock( &p_input->stream.stream_lock );
-
- if( p_input->stream.i_new_status == PAUSE_S )
- {
- int i_old_status;
-
- vlc_mutex_lock( &p_input->stream.control.control_lock );
- i_old_status = p_input->stream.control.i_status;
- p_input->stream.control.i_status = PAUSE_S;
- vlc_mutex_unlock( &p_input->stream.control.control_lock );
-
- vlc_cond_wait( &p_input->stream.stream_wait,
- &p_input->stream.stream_lock );
- ClockNewRef( p_pgrm, i_clock, p_pgrm->last_pts > mdate() ?
- p_pgrm->last_pts : mdate() );
-
- if( p_input->stream.i_new_status == PAUSE_S )
- {
- /* PAUSE_S undoes the pause state: Return to old state. */
- vlc_mutex_lock( &p_input->stream.control.control_lock );
- p_input->stream.control.i_status = i_old_status;
- vlc_mutex_unlock( &p_input->stream.control.control_lock );
-
- p_input->stream.i_new_status = UNDEF_S;
- p_input->stream.i_new_rate = UNDEF_S;
- }
-
- /* We handle i_new_status != PAUSE_S below... */
-
- i_return_value = PAUSE_S;
- }
-
- if( p_input->stream.i_new_status != UNDEF_S )
- {
- vlc_mutex_lock( &p_input->stream.control.control_lock );
-
- p_input->stream.control.i_status = p_input->stream.i_new_status;
-
- ClockNewRef( p_pgrm, i_clock,
- ClockToSysdate( p_input, p_pgrm, i_clock ) );
-
- if( p_input->stream.control.i_status == PLAYING_S )
- {
- p_input->stream.control.i_rate = DEFAULT_RATE;
- p_input->stream.control.b_mute = 0;
- }
- else
- {
- p_input->stream.control.i_rate = p_input->stream.i_new_rate;
- p_input->stream.control.b_mute = 1;
-
- /* Feed the audio decoders with a NULL packet to avoid
- * discontinuities. */
- input_EscapeAudioDiscontinuity( p_input );
- }
-
- val.i_int = p_input->stream.control.i_rate;
- var_Change( p_input, "rate", VLC_VAR_SETVALUE, &val, NULL );
-
- val.i_int = p_input->stream.control.i_status;
- var_Change( p_input, "state", VLC_VAR_SETVALUE, &val, NULL );
-
- p_input->stream.i_new_status = UNDEF_S;
- p_input->stream.i_new_rate = UNDEF_S;
-
- vlc_mutex_unlock( &p_input->stream.control.control_lock );
- }
-
- vlc_mutex_unlock( &p_input->stream.stream_lock );
-
- return( i_return_value );
-#endif
- return UNDEF_S;
-}
-#endif
-
/*****************************************************************************
* input_ClockSetPCR: manages a clock reference
*****************************************************************************/
void input_ClockSetPCR( input_thread_t *p_input,
input_clock_t *cl, mtime_t i_clock )
{
+ const bool b_synchronize = p_input->b_can_pace_control && cl->b_master;
+ const mtime_t i_mdate = mdate();
+
if( ( cl->i_synchro_state != SYNCHRO_OK ) ||
( i_clock == 0 && cl->last_cr != 0 ) )
{
/* Feed synchro with a new reference point. */
ClockNewRef( cl, i_clock,
- cl->last_pts + CR_MEAN_PTS_GAP > mdate() ?
- cl->last_pts + CR_MEAN_PTS_GAP : mdate() );
+ __MAX( cl->last_pts + CR_MEAN_PTS_GAP, i_mdate ) );
cl->i_synchro_state = SYNCHRO_OK;
- if( p_input->b_can_pace_control && cl->b_master )
+ if( !b_synchronize )
{
- cl->last_cr = i_clock;
- if( !p_input->b_out_pace_control )
- {
- mtime_t i_wakeup = ClockToSysdate( p_input, cl, i_clock );
- while( (i_wakeup - mdate()) / CLOCK_FREQ > 1 )
- {
- msleep( CLOCK_FREQ );
- if( p_input->b_die ) i_wakeup = mdate();
- }
- mwait( i_wakeup );
- }
- }
- else
- {
- cl->last_cr = 0;
cl->delta_cr = 0;
- cl->c_average_count = 0;
+ cl->i_delta_cr_residue = 0;
+ cl->last_update = 0;
}
}
- else
+ else if ( cl->last_cr != 0 &&
+ ( (cl->last_cr - i_clock) > CR_MAX_GAP ||
+ (cl->last_cr - i_clock) < - CR_MAX_GAP ) )
{
- if ( cl->last_cr != 0 &&
- ( (cl->last_cr - i_clock) > CR_MAX_GAP
- || (cl->last_cr - i_clock) < - CR_MAX_GAP ) )
- {
- /* Stream discontinuity, for which we haven't received a
- * warning from the stream control facilities (dd-edited
- * stream ?). */
- msg_Warn( p_input, "clock gap, unexpected stream discontinuity" );
- input_ClockInit( cl, cl->b_master, cl->i_cr_average );
- /* FIXME needed ? */
-#if 0
- input_EscapeDiscontinuity( p_input );
-#endif
- }
+ /* Stream discontinuity, for which we haven't received a
+ * warning from the stream control facilities (dd-edited
+ * stream ?). */
+ msg_Warn( p_input, "clock gap, unexpected stream discontinuity" );
+ input_ClockInit( cl, cl->b_master, cl->i_cr_average, cl->i_rate );
+ /* Feed synchro with a new reference point. */
+ msg_Warn( p_input, "feeding synchro with a new reference point trying to recover from clock gap" );
+ ClockNewRef( cl, i_clock,
+ __MAX( cl->last_pts + CR_MEAN_PTS_GAP, i_mdate ) );
+ cl->i_synchro_state = SYNCHRO_OK;
+ }
- cl->last_cr = i_clock;
+ cl->last_cr = i_clock;
+ cl->last_sysdate = i_mdate;
- if( p_input->b_can_pace_control && cl->b_master )
+ if( b_synchronize )
+ {
+ /* Wait a while before delivering the packets to the decoder.
+ * In case of multiple programs, we arbitrarily follow the
+ * clock of the selected program. */
+ if( !p_input->p->b_out_pace_control )
{
- /* Wait a while before delivering the packets to the decoder.
- * In case of multiple programs, we arbitrarily follow the
- * clock of the selected program. */
- if( !p_input->b_out_pace_control )
+ mtime_t i_wakeup = ClockToSysdate( cl, i_clock );
+ while( (i_wakeup - mdate()) / CLOCK_FREQ > 1 )
{
- mtime_t i_wakeup = ClockToSysdate( p_input, cl, i_clock );
- while( (i_wakeup - mdate()) / CLOCK_FREQ > 1 )
- {
- msleep( CLOCK_FREQ );
- if( p_input->b_die ) i_wakeup = mdate();
- }
- mwait( i_wakeup );
+ msleep( CLOCK_FREQ );
+ if( p_input->b_die ) i_wakeup = mdate();
}
- /* FIXME Not needed anymore ? */
-#if 0
- /* Now take into account interface changes. */
- input_ClockManageControl( p_input, cl, i_clock );
-#endif
+ mwait( i_wakeup );
}
- else
- {
- /* Smooth clock reference variations. */
- mtime_t i_extrapoled_clock = ClockCurrent( p_input, cl );
+ }
+ else if ( i_mdate - cl->last_update > 200000 )
+ {
+ /* Smooth clock reference variations. */
+ const mtime_t i_extrapoled_clock = ClockCurrent( cl );
+ /* Bresenham algorithm to smooth variations. */
+ const mtime_t i_tmp = cl->delta_cr * (cl->i_cr_average - 1) +
+ ( i_extrapoled_clock - i_clock ) * 1 +
+ cl->i_delta_cr_residue;
- /* Bresenham algorithm to smooth variations. */
- cl->delta_cr = ( cl->delta_cr * (cl->i_cr_average - 1)
- + ( i_extrapoled_clock - i_clock ) )
- / cl->i_cr_average;
- }
+ cl->i_delta_cr_residue = i_tmp % cl->i_cr_average;
+ cl->delta_cr = i_tmp / cl->i_cr_average;
+
+ cl->last_update = i_mdate;
}
}
+/*****************************************************************************
+ * input_ClockResetPCR:
+ *****************************************************************************/
+void input_ClockResetPCR( input_clock_t *cl )
+{
+ cl->i_synchro_state = SYNCHRO_REINIT;
+ cl->last_pts = 0;
+}
+
/*****************************************************************************
* input_ClockGetTS: manages a PTS or DTS
*****************************************************************************/
if( cl->i_synchro_state != SYNCHRO_OK )
return 0;
- cl->last_pts = ClockToSysdate( p_input, cl, i_ts + cl->delta_cr );
+ cl->last_pts = ClockToSysdate( cl, i_ts + cl->delta_cr );
return cl->last_pts + p_input->i_pts_delay;
}
+/*****************************************************************************
+ * input_ClockSetRate:
+ *****************************************************************************/
+void input_ClockSetRate( input_clock_t *cl, int i_rate )
+{
+ /* Move the reference point */
+ if( cl->i_synchro_state == SYNCHRO_OK )
+ ClockNewRef( cl, cl->last_cr, cl->last_sysdate );
+
+ cl->i_rate = i_rate;
+}
+
projects / vlc / blobdiff