Commit 3a3f1725 authored by Christophe Massiot's avatar Christophe Massiot

* Finally fixed repeat_first_field and co. (pas encore tout compris...)

parent 4bcf1bae
......@@ -2,7 +2,7 @@
* vpar_headers.h : video parser : headers parsing
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
* $Id: vpar_headers.h,v 1.2 2001/01/15 13:25:09 massiot Exp $
* $Id: vpar_headers.h,v 1.3 2001/01/15 18:02:48 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Stphane Borel <stef@via.ecp.fr>
......@@ -110,7 +110,7 @@ typedef struct picture_parsing_s
int i_intra_dc_precision;
boolean_t b_frame_pred_frame_dct, b_q_scale_type;
boolean_t b_intra_vlc_format;
boolean_t b_alternate_scan, b_progressive_frame;
boolean_t b_alternate_scan, b_progressive;
boolean_t b_top_field_first, b_concealment_mv;
boolean_t b_repeat_first_field;
/* Relative to the current field */
......
......@@ -2,7 +2,7 @@
* vpar_synchro.h : video parser blocks management
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
* $Id: vpar_synchro.h,v 1.4 2000/12/29 12:49:29 massiot Exp $
* $Id: vpar_synchro.h,v 1.5 2001/01/15 18:02:49 massiot Exp $
*
* Author: Christophe Massiot <massiot@via.ecp.fr>
*
......@@ -64,6 +64,7 @@ typedef struct video_synchro_s
unsigned int i_eta_p, i_eta_b;
boolean_t b_dropped_last; /* for special synchros below */
mtime_t backward_pts, current_pts;
mtime_t next_period; /* period to add to the next picture */
#ifdef STATS
unsigned int i_trashed_pic, i_not_chosen_pic, i_pic;
......
......@@ -2,7 +2,7 @@
* vpar_headers.c : headers parsing
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
* $Id: vpar_headers.c,v 1.68 2001/01/13 12:57:21 sam Exp $
* $Id: vpar_headers.c,v 1.69 2001/01/15 18:02:49 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Stphane Borel <stef@via.ecp.fr>
......@@ -542,11 +542,9 @@ static void PictureHeader( vpar_thread_t * p_vpar )
p_vpar->picture.b_intra_vlc_format = GetBits( &p_vpar->bit_stream, 1 );
p_vpar->picture.b_alternate_scan = GetBits( &p_vpar->bit_stream, 1 );
p_vpar->picture.b_repeat_first_field = GetBits( &p_vpar->bit_stream, 1 );
/* repeat_first_field (ISO/IEC 13818-2 6.3.10 is necessary to know
* the length of the picture_display_extension structure.
* chroma_420_type (obsolete) */
/* chroma_420_type (obsolete) */
RemoveBits( &p_vpar->bit_stream, 1 );
p_vpar->picture.b_progressive_frame = GetBits( &p_vpar->bit_stream, 1 );
p_vpar->picture.b_progressive = GetBits( &p_vpar->bit_stream, 1 );
/* composite_display_flag */
if( GetBits( &p_vpar->bit_stream, 1 ) )
......@@ -561,13 +559,14 @@ static void PictureHeader( vpar_thread_t * p_vpar )
/* MPEG-1 compatibility flags */
p_vpar->picture.i_intra_dc_precision = 0; /* 8 bits */
i_structure = FRAME_STRUCTURE;
p_vpar->picture.b_top_field_first = 0;
p_vpar->picture.b_frame_pred_frame_dct = 1;
p_vpar->picture.b_concealment_mv = 0;
p_vpar->picture.b_q_scale_type = 0;
p_vpar->picture.b_intra_vlc_format = 0;
p_vpar->picture.b_alternate_scan = 0; /* zigzag */
p_vpar->picture.b_repeat_first_field = 0;
p_vpar->picture.b_progressive_frame = 1;
p_vpar->picture.b_repeat_first_field = 1;
p_vpar->picture.b_progressive = 1;
}
#ifdef STATS
......@@ -619,9 +618,30 @@ static void PictureHeader( vpar_thread_t * p_vpar )
}
else
{
int i_repeat_field;
/* Compute the number of times the frame will be emitted by the
* decoder (number of periods). */
if( p_vpar->sequence.b_progressive )
{
i_repeat_field = 1 + p_vpar->picture.b_repeat_first_field
+ p_vpar->picture.b_top_field_first;
}
else
{
if( p_vpar->picture.b_progressive )
{
i_repeat_field = 2 + p_vpar->picture.b_repeat_first_field;
}
else
{
i_repeat_field = 2;
}
}
/* Warn synchro we have a new picture (updates pictures index). */
vpar_SynchroNewPicture( p_vpar, p_vpar->picture.i_coding_type,
p_vpar->picture.b_repeat_first_field );
i_repeat_field );
if( b_parsable )
{
......@@ -751,7 +771,6 @@ static void PictureHeader( vpar_thread_t * p_vpar )
if( p_vpar->picture.b_error )
{
/* Trash picture. */
//fprintf(stderr, "Image trashee\n");
#ifdef VDEC_SMP
for( i_mb = 1; p_vpar->picture.pp_mb[i_mb] != NULL; i_mb++ )
{
......@@ -778,7 +797,6 @@ static void PictureHeader( vpar_thread_t * p_vpar )
}
else if( p_vpar->picture.i_current_structure == FRAME_STRUCTURE )
{
//fprintf(stderr, "Image parsee (%d)\n", p_vpar->picture.i_coding_type);
/* Frame completely parsed. */
#ifdef VDEC_SMP
for( i_mb = 1; p_vpar->picture.pp_mb[i_mb] != NULL; i_mb++ )
......
......@@ -2,7 +2,7 @@
* vpar_synchro.c : frame dropping routines
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
* $Id: vpar_synchro.c,v 1.72 2001/01/15 13:25:09 massiot Exp $
* $Id: vpar_synchro.c,v 1.73 2001/01/15 18:02:49 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Samuel Hocevar <sam@via.ecp.fr>
......@@ -130,7 +130,6 @@ static int SynchroType( void );
/* Error margins */
#define DELTA (int)(0.040*CLOCK_FREQ)
#define PTS_THRESHOLD (int)(0.030*CLOCK_FREQ)
#define DEFAULT_NB_P 5
#define DEFAULT_NB_B 1
......@@ -151,7 +150,7 @@ void vpar_SynchroInit( vpar_thread_t * p_vpar )
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.backward_pts = p_vpar->synchro.next_period = 0;
#ifdef STATS
p_vpar->synchro.i_trashed_pic = p_vpar->synchro.i_not_chosen_pic =
p_vpar->synchro.i_pic = 0;
......@@ -419,7 +418,7 @@ mtime_t vpar_SynchroDate( vpar_thread_t * p_vpar )
* vpar_SynchroNewPicture: Update stream structure and PTS
*****************************************************************************/
void vpar_SynchroNewPicture( vpar_thread_t * p_vpar, int i_coding_type,
boolean_t b_repeat_field )
int i_repeat_field )
{
mtime_t period = 1000000 / (p_vpar->sequence.i_frame_rate) * 1001;
......@@ -469,18 +468,14 @@ void vpar_SynchroNewPicture( vpar_thread_t * p_vpar, int i_coding_type,
break;
}
if( b_repeat_field )
{
/* MPEG-2 repeat_first_field */
/* FIXME : this is not exactly what we should do, repeat_first_field
* only regards the next picture */
p_vpar->synchro.current_pts += period + (period >> 1);
}
else
{
p_vpar->synchro.current_pts += period;
}
p_vpar->synchro.current_pts += p_vpar->synchro.next_period;
/* 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.next_period = i_repeat_field * (period >> 1);
#define PTS_THRESHOLD (period >> 2)
if( i_coding_type == B_CODING_TYPE )
{
if( p_vpar->sequence.next_pts )
......@@ -551,6 +546,7 @@ void vpar_SynchroNewPicture( vpar_thread_t * p_vpar, int i_coding_type,
p_vpar->sequence.next_pts = 0;
}
}
#undef PTS_THRESHOLD
#ifdef STATS
p_vpar->synchro.i_pic++;
......
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