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- Do not resample if delta is short enough

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This commit is contained in:
Cyril Deguet 2001-11-01 00:29:54 +00:00
parent 6ac2aafab2
commit 6d117d04fb
1 changed files with 20 additions and 2 deletions
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22
src/audio_output/aout_common.h
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@ -2,7 +2,7 @@
* aout_common.h: audio output inner functions
*****************************************************************************
* Copyright (C) 1999, 2000, 2001 VideoLAN
* $Id: aout_common.h,v 1.4 2001/05/01 04:18:18 sam Exp $
* $Id: aout_common.h,v 1.5 2001/11/01 00:29:54 asmax Exp $
*
* Authors: Michel Kaempf <maxx@via.ecp.fr>
*
@ -21,6 +21,12 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/* Biggest difference allowed between scheduled playing date and actual date
(in microseconds) */
#define MAX_DELTA 10000
/* Creating as many aout_Thread functions as configurations was one solution,
* examining the different cases in the Thread loop of an unique function was
* another. I chose the first solution. */
@ -73,6 +79,7 @@ static __inline__ int NextFrame( aout_thread_t * p_aout, aout_fifo_t * p_fifo,
mtime_t aout_date )
{
long l_units, l_rate;
long long l_delta;
/* We take the lock */
vlc_mutex_lock( &p_fifo->data_lock );
@ -126,7 +133,18 @@ static __inline__ int NextFrame( aout_thread_t * p_aout, aout_fifo_t * p_fifo,
l_units = ((p_fifo->l_next_frame - p_fifo->l_start_frame) & AOUT_FIFO_SIZE) * (p_fifo->l_frame_size >> (p_fifo->b_stereo));
l_rate = p_fifo->l_rate + ((aout_date - p_fifo->date[p_fifo->l_start_frame]) / 256);
l_delta = aout_date - p_fifo->date[p_fifo->l_start_frame];
/* Resample if delta is too long */
if( abs(l_delta) > MAX_DELTA )
{
l_rate = p_fifo->l_rate + (l_delta / 256);
}
else
{
l_rate = p_fifo->l_rate;
}
intf_DbgMsg( "aout debug: %lli (%li);", aout_date - p_fifo->date[p_fifo->l_start_frame], l_rate );
InitializeIncrement( &p_fifo->unit_increment, l_rate, p_aout->l_rate );