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Commit ed7d6cbf authored by Laurent Aimar's avatar Laurent Aimar
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Fixed libmpeg2 wrapper picture handling. 

It should fix lost some picture errors that were critical with dvd menus.
It also seems to fix #2803 but I don't really understand why.
parent 641da394
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Showing with 324 additions and 253 deletions
modules/codec/libmpeg2.c
View file @ ed7d6cbf
......@@ -28,6 +28,7 @@
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include <vlc_common.h>
#include <vlc_plugin.h>
......@@ -42,6 +43,14 @@
/*****************************************************************************
* decoder_sys_t : libmpeg2 decoder descriptor
*****************************************************************************/
#define DPB_COUNT (3+1)
typedef struct
{
picture_t *p_picture;
bool b_linked;
bool b_displayed;
} picture_dpb_t;
struct decoder_sys_t
{
/*
......@@ -58,7 +67,6 @@ struct decoder_sys_t
mtime_t i_current_pts;
mtime_t i_previous_dts;
mtime_t i_current_dts;
picture_t * p_picture_to_destroy;
bool b_garbage_pic;
bool b_after_sequence_header; /* is it the next frame after
* the sequence header ? */
......@@ -67,6 +75,9 @@ struct decoder_sys_t
bool b_preroll;
/* */
picture_dpb_t p_dpb[DPB_COUNT];
/*
* Output properties
*/
......@@ -94,9 +105,18 @@ static void CloseDecoder( vlc_object_t * );
static picture_t *DecodeBlock( decoder_t *, block_t ** );
static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] );
static picture_t *GetNewPicture( decoder_t *, uint8_t ** );
static picture_t *GetNewPicture( decoder_t * );
static void PutPicture( decoder_t *, picture_t * );
static void GetAR( decoder_t *p_dec );
/* */
static void DpbInit( decoder_t * );
static void DpbClean( decoder_t * );
static picture_t *DpbNewPicture( decoder_t * );
static void DpbUnlinkPicture( decoder_t *, picture_t * );
static void DpbDisplayPicture( decoder_t *, picture_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
......@@ -148,12 +168,12 @@ static int OpenDecoder( vlc_object_t *p_this )
p_sys->i_previous_pts = 0;
p_sys->i_current_dts = 0;
p_sys->i_previous_dts = 0;
p_sys->p_picture_to_destroy = NULL;
p_sys->b_garbage_pic = 0;
p_sys->b_slice_i = 0;
p_sys->b_second_field = 0;
p_sys->b_skip = 0;
p_sys->b_garbage_pic = false;
p_sys->b_slice_i = false;
p_sys->b_second_field = false;
p_sys->b_skip = false;
p_sys->b_preroll = false;
DpbInit( p_dec );
p_sys->i_cc_pts = 0;
p_sys->i_cc_dts = 0;
......@@ -225,9 +245,16 @@ static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
block_t *p_block;
if( !pp_block || !*pp_block ) return NULL;
if( !pp_block || !*pp_block )
return NULL;
p_block = *pp_block;
if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY | BLOCK_FLAG_CORRUPTED) )
{
cc_Flush( &p_sys->cc );
mpeg2_reset( p_sys->p_mpeg2dec, p_sys->p_info->sequence != NULL );
DpbClean( p_dec );
}
while( 1 )
{
......@@ -235,163 +262,77 @@ static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
switch( state )
{
case STATE_BUFFER:
if( !p_block->i_buffer )
{
block_Release( p_block );
return NULL;
}
if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY
| BLOCK_FLAG_CORRUPTED))
cc_Flush( &p_sys->cc );
if( (p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY
| BLOCK_FLAG_CORRUPTED)) &&
p_sys->p_synchro &&
p_sys->p_info->sequence &&
p_sys->p_info->sequence->width != (unsigned)-1 )
{
decoder_SynchroReset( p_sys->p_synchro );
if( p_sys->p_info->current_fbuf != NULL
&& p_sys->p_info->current_fbuf->id != NULL )
{
p_sys->b_garbage_pic = 1;
p_pic = p_sys->p_info->current_fbuf->id;
}
else
{
uint8_t *buf[3];
buf[0] = buf[1] = buf[2] = NULL;
if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
{
p_block->i_buffer = 0;
break;
}
mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
mpeg2_stride( p_sys->p_mpeg2dec, p_pic->p[Y_PLANE].i_pitch );
}
p_sys->p_picture_to_destroy = p_pic;
if ( p_sys->b_slice_i )
{
decoder_SynchroNewPicture( p_sys->p_synchro,
I_CODING_TYPE, 2, 0, 0,
p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
decoder_SynchroDecode( p_sys->p_synchro );
decoder_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
}
}
if( p_block->i_flags & BLOCK_FLAG_PREROLL )
{
p_sys->b_preroll = true;
}
else if( p_sys->b_preroll )
{
p_sys->b_preroll = false;
/* Reset synchro */
decoder_SynchroReset( p_sys->p_synchro );
}
#ifdef PIC_FLAG_PTS
if( p_block->i_pts )
{
mpeg2_pts( p_sys->p_mpeg2dec, (uint32_t)p_block->i_pts );
#else /* New interface */
if( p_block->i_pts || p_block->i_dts )
{
mpeg2_tag_picture( p_sys->p_mpeg2dec,
(uint32_t)p_block->i_pts,
(uint32_t)p_block->i_dts );
#endif
p_sys->i_previous_pts = p_sys->i_current_pts;
p_sys->i_current_pts = p_block->i_pts;
p_sys->i_previous_dts = p_sys->i_current_dts;
p_sys->i_current_dts = p_block->i_dts;
}
mpeg2_buffer( p_sys->p_mpeg2dec, p_block->p_buffer,
p_block->p_buffer + p_block->i_buffer );
p_block->i_buffer = 0;
break;
#if MPEG2_RELEASE >= MPEG2_VERSION (0, 5, 0)
case STATE_SEQUENCE_MODIFIED:
GetAR( p_dec );
break;
#endif
case STATE_SEQUENCE:
{
/* Initialize video output */
uint8_t *buf[3];
buf[0] = buf[1] = buf[2] = NULL;
GetAR( p_dec );
/* */
DpbClean( p_dec );
/* */
mpeg2_custom_fbuf( p_sys->p_mpeg2dec, 1 );
/* Set the first 2 reference frames */
mpeg2_set_buf( p_sys->p_mpeg2dec, buf, NULL );
if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
GetAR( p_dec );
for( int i = 0; i < 2; i++ )
{
block_Release( p_block );
return NULL;
picture_t *p_picture = DpbNewPicture( p_dec );
if( !p_picture )
{
/* Is it ok ? or do we need a reset ? */
block_Release( p_block );
return NULL;
}
PutPicture( p_dec, p_picture );
}
mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
mpeg2_stride( p_sys->p_mpeg2dec, p_pic->p[Y_PLANE].i_pitch );
/* This picture will never go through display_picture. */
p_pic->date = 0;
/* For some reason, libmpeg2 will put this pic twice in
* discard_picture. This can be considered a bug in libmpeg2. */
decoder_LinkPicture( p_dec, p_pic );
if( p_sys->p_synchro )
{
decoder_SynchroRelease( p_sys->p_synchro );
}
p_sys->p_synchro = decoder_SynchroInit( p_dec,
(uint32_t)((uint64_t)1001000000 * 27 /
p_sys->p_info->sequence->frame_period) );
p_sys->b_after_sequence_header = 1;
p_sys->p_synchro =
decoder_SynchroInit( p_dec, (uint32_t)((uint64_t)1001000000 * 27 /
p_sys->p_info->sequence->frame_period) );
p_sys->b_after_sequence_header = true;
break;
}
break;
case STATE_PICTURE_2ND:
p_sys->b_second_field = 1;
case STATE_GOP:
/* There can be userdata in a GOP. It needs to be remembered for the next picture. */
if( p_sys->p_info->user_data_len > 2 )
{
free( p_sys->p_gop_user_data );
p_sys->p_gop_user_data = calloc( p_sys->p_info->user_data_len, sizeof(uint8_t) );
if( p_sys->p_gop_user_data )
{
p_sys->i_gop_user_data = p_sys->p_info->user_data_len;
memcpy( p_sys->p_gop_user_data, p_sys->p_info->user_data, p_sys->p_info->user_data_len );
}
}
break;
case STATE_PICTURE:
{
uint8_t *buf[3];
const mpeg2_info_t *p_info = p_sys->p_info;
const mpeg2_picture_t *p_current = p_info->current_picture;
mtime_t i_pts, i_dts;
buf[0] = buf[1] = buf[2] = NULL;
if ( p_sys->b_after_sequence_header &&
((p_sys->p_info->current_picture->flags &
PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_P) )
if( p_sys->b_after_sequence_header &&
(p_current->flags &
PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_P )
{
/* Intra-slice refresh. Simulate a blank I picture. */
msg_Dbg( p_dec, "intra-slice refresh stream" );
decoder_SynchroNewPicture( p_sys->p_synchro,
I_CODING_TYPE, 2, 0, 0,
p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
I_CODING_TYPE, 2, 0, 0,
p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
decoder_SynchroDecode( p_sys->p_synchro );
decoder_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
p_sys->b_slice_i = 1;
p_sys->b_slice_i = true;
}
p_sys->b_after_sequence_header = 0;
p_sys->b_after_sequence_header = false;
#ifdef PIC_FLAG_PTS
i_pts = p_sys->p_info->current_picture->flags & PIC_FLAG_PTS ?
( ( p_sys->p_info->current_picture->pts ==
i_pts = p_current->flags & PIC_FLAG_PTS ?
( ( p_current->pts ==
(uint32_t)p_sys->i_current_pts ) ?
p_sys->i_current_pts : p_sys->i_previous_pts ) : 0;
i_dts = 0;
......@@ -399,8 +340,8 @@ static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
/* Hack to handle demuxers which only have DTS timestamps */
if( !i_pts && !p_block->i_pts && p_block->i_dts > 0 )
{
if( p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY ||
(p_sys->p_info->current_picture->flags &
if( p_info->sequence->flags & SEQ_FLAG_LOW_DELAY ||
(p_current->flags &
PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_B )
{
i_pts = p_block->i_dts;
......@@ -411,14 +352,12 @@ static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
#else /* New interface */
i_pts = p_sys->p_info->current_picture->flags & PIC_FLAG_TAGS ?
( ( p_sys->p_info->current_picture->tag ==
(uint32_t)p_sys->i_current_pts ) ?
p_sys->i_current_pts : p_sys->i_previous_pts ) : 0;
i_dts = p_sys->p_info->current_picture->flags & PIC_FLAG_TAGS ?
( ( p_sys->p_info->current_picture->tag2 ==
(uint32_t)p_sys->i_current_dts ) ?
p_sys->i_current_dts : p_sys->i_previous_dts ) : 0;
i_pts = p_current->flags & PIC_FLAG_TAGS ?
( ( p_current->tag == (uint32_t)p_sys->i_current_pts ) ?
p_sys->i_current_pts : p_sys->i_previous_pts ) : 0;
i_dts = p_current->flags & PIC_FLAG_TAGS ?
( ( p_current->tag2 == (uint32_t)p_sys->i_current_dts ) ?
p_sys->i_current_dts : p_sys->i_previous_dts ) : 0;
#endif
/* If nb_fields == 1, it is a field picture, and it will be
......@@ -428,36 +367,37 @@ static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
* This kind of sucks, but I didn't think better. --Meuuh
*/
decoder_SynchroNewPicture( p_sys->p_synchro,
p_sys->p_info->current_picture->flags & PIC_MASK_CODING_TYPE,
p_sys->p_info->current_picture->nb_fields == 1 ? 2 :
p_sys->p_info->current_picture->nb_fields, i_pts, i_dts,
p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
p_current->flags & PIC_MASK_CODING_TYPE,
p_current->nb_fields == 1 ? 2 :
p_current->nb_fields, i_pts, i_dts,
p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
bool b_skip = false;
if( !p_dec->b_pace_control && !p_sys->b_preroll &&
!(p_sys->b_slice_i
&& ((p_sys->p_info->current_picture->flags
&& ((p_current->flags
& PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_P))
&& !decoder_SynchroChoose( p_sys->p_synchro,
p_sys->p_info->current_picture->flags
p_current->flags
& PIC_MASK_CODING_TYPE,
/*p_sys->p_vout->render_time*/ 0 /*FIXME*/,
p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY ) )
p_info->sequence->flags & SEQ_FLAG_LOW_DELAY ) )
{
b_skip = true;
}
p_pic = NULL;
if( !b_skip )
p_pic = GetNewPicture( p_dec, buf );
p_pic = DpbNewPicture( p_dec );
if( b_skip || !p_pic )
{
mpeg2_skip( p_sys->p_mpeg2dec, 1 );
p_sys->b_skip = 1;
p_sys->b_skip = true;
decoder_SynchroTrash( p_sys->p_synchro );
mpeg2_set_buf( p_sys->p_mpeg2dec, buf, NULL );
PutPicture( p_dec, NULL );
if( !b_skip )
{
......@@ -468,20 +408,19 @@ static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
else
{
mpeg2_skip( p_sys->p_mpeg2dec, 0 );
p_sys->b_skip = 0;
p_sys->b_skip = false;
decoder_SynchroDecode( p_sys->p_synchro );
mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
mpeg2_stride( p_sys->p_mpeg2dec, p_pic->p[Y_PLANE].i_pitch );
PutPicture( p_dec, p_pic );
}
if( p_sys->p_info->user_data_len > 2 || p_sys->i_gop_user_data > 2 )
if( p_info->user_data_len > 2 || p_sys->i_gop_user_data > 2 )
{
p_sys->i_cc_pts = i_pts;
p_sys->i_cc_dts = i_dts;
if( (p_sys->p_info->current_picture->flags
if( (p_current->flags
& PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_P )
p_sys->i_cc_flags = BLOCK_FLAG_TYPE_P;
else if( (p_sys->p_info->current_picture->flags
else if( (p_current->flags
& PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_B )
p_sys->i_cc_flags = BLOCK_FLAG_TYPE_B;
else p_sys->i_cc_flags = BLOCK_FLAG_TYPE_I;
......@@ -494,125 +433,135 @@ static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
}
/* Extract the CC from the user_data of the picture */
if( p_sys->p_info->user_data_len > 2 )
cc_Extract( &p_sys->cc, &p_sys->p_info->user_data[0], p_sys->p_info->user_data_len );
if( p_info->user_data_len > 2 )
cc_Extract( &p_sys->cc, &p_info->user_data[0], p_info->user_data_len );
}
}
break;
case STATE_GOP:
/* There can be userdata in a GOP. It needs to be remembered for the next picture. */
if( p_sys->p_info->user_data_len > 2 )
case STATE_BUFFER:
if( !p_block->i_buffer )
{
free( p_sys->p_gop_user_data );
p_sys->p_gop_user_data = calloc( p_sys->p_info->user_data_len, sizeof(uint8_t) );
if( p_sys->p_gop_user_data )
block_Release( p_block );
return NULL;
}
if( (p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY
| BLOCK_FLAG_CORRUPTED)) &&
p_sys->p_synchro &&
p_sys->p_info->sequence &&
p_sys->p_info->sequence->width != (unsigned)-1 )
{
decoder_SynchroReset( p_sys->p_synchro );
if( p_sys->p_info->current_fbuf != NULL &&
p_sys->p_info->current_fbuf->id != NULL )
{
p_sys->i_gop_user_data = p_sys->p_info->user_data_len;
memcpy( p_sys->p_gop_user_data, p_sys->p_info->user_data, p_sys->p_info->user_data_len );
p_sys->b_garbage_pic = true;
}
if( p_sys->b_slice_i )
{
decoder_SynchroNewPicture( p_sys->p_synchro,
I_CODING_TYPE, 2, 0, 0,
p_sys->p_info->sequence->flags &
SEQ_FLAG_LOW_DELAY );
decoder_SynchroDecode( p_sys->p_synchro );
decoder_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
}
}
if( p_block->i_flags & BLOCK_FLAG_PREROLL )
{
p_sys->b_preroll = true;
}
else if( p_sys->b_preroll )
{
p_sys->b_preroll = false;
if( p_sys->p_synchro )
decoder_SynchroReset( p_sys->p_synchro );
}
#ifdef PIC_FLAG_PTS
if( p_block->i_pts )
{
mpeg2_pts( p_sys->p_mpeg2dec, (uint32_t)p_block->i_pts );
#else /* New interface */
if( p_block->i_pts || p_block->i_dts )
{
mpeg2_tag_picture( p_sys->p_mpeg2dec,
(uint32_t)p_block->i_pts,
(uint32_t)p_block->i_dts );
#endif
p_sys->i_previous_pts = p_sys->i_current_pts;
p_sys->i_current_pts = p_block->i_pts;
p_sys->i_previous_dts = p_sys->i_current_dts;
p_sys->i_current_dts = p_block->i_dts;
}
mpeg2_buffer( p_sys->p_mpeg2dec, p_block->p_buffer,
p_block->p_buffer + p_block->i_buffer );
p_block->i_buffer = 0;
break;
#if MPEG2_RELEASE >= MPEG2_VERSION (0, 5, 0)
case STATE_SEQUENCE_MODIFIED:
GetAR( p_dec );
break;
#endif
case STATE_PICTURE_2ND:
p_sys->b_second_field = true;
break;
case STATE_INVALID_END:
case STATE_END:
case STATE_SLICE:
p_pic = NULL;
if( p_sys->p_info->display_fbuf
&& p_sys->p_info->display_fbuf->id )
if( p_sys->p_info->display_fbuf &&
p_sys->p_info->display_fbuf->id )
{
p_pic = (picture_t *)p_sys->p_info->display_fbuf->id;
p_pic = p_sys->p_info->display_fbuf->id;
DpbDisplayPicture( p_dec, p_pic );
decoder_SynchroEnd( p_sys->p_synchro,
p_sys->p_info->display_picture->flags
& PIC_MASK_CODING_TYPE,
p_sys->b_garbage_pic );
p_sys->b_garbage_pic = 0;
p_sys->p_info->display_picture->flags & PIC_MASK_CODING_TYPE,
p_sys->b_garbage_pic );
if( p_sys->p_picture_to_destroy != p_pic )
{
p_pic->date = decoder_SynchroDate( p_sys->p_synchro );
}
else
{
p_sys->p_picture_to_destroy = NULL;
p_pic->date = 0;
}
p_pic->date = decoder_SynchroDate( p_sys->p_synchro );
if( p_sys->b_garbage_pic )
p_pic->date = 0; /* ??? */
p_sys->b_garbage_pic = false;
}
if( p_sys->p_info->discard_fbuf &&
p_sys->p_info->discard_fbuf->id )
{
decoder_UnlinkPicture( p_dec,
p_sys->p_info->discard_fbuf->id );
DpbUnlinkPicture( p_dec, p_sys->p_info->discard_fbuf->id );
}
/* For still frames */
if( state == STATE_END && p_pic ) p_pic->b_force = true;
if( state == STATE_END && p_pic )
p_pic->b_force = true;
if( p_pic )
{
/* Avoid frames with identical timestamps.
* Especially needed for still frames in DVD menus. */
if( p_sys->i_last_frame_pts == p_pic->date ) p_pic->date++;
if( p_sys->i_last_frame_pts == p_pic->date )
p_pic->date++;
p_sys->i_last_frame_pts = p_pic->date;
return p_pic;
}
break;
case STATE_INVALID:
{
uint8_t *buf[3];
buf[0] = buf[1] = buf[2] = NULL;
msg_Warn( p_dec, "invalid picture encountered" );
if ( ( p_sys->p_info->current_picture == NULL ) ||
( ( p_sys->p_info->current_picture->flags &
PIC_MASK_CODING_TYPE) != PIC_FLAG_CODING_TYPE_B ) )
{
if( p_sys->p_synchro ) decoder_SynchroReset( p_sys->p_synchro );
}
mpeg2_skip( p_sys->p_mpeg2dec, 1 );
p_sys->b_skip = 1;
cc_Flush( &p_sys->cc );
if( p_sys->p_info->current_fbuf &&
p_sys->p_info->current_fbuf->id )
{
p_sys->b_garbage_pic = 1;
p_pic = p_sys->p_info->current_fbuf->id;
}
else if( !p_sys->p_info->sequence )
{
break;
}
else
{
if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
break;
mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
mpeg2_stride( p_sys->p_mpeg2dec, p_pic->p[Y_PLANE].i_pitch );
}
p_sys->p_picture_to_destroy = p_pic;
memset( p_pic->p[0].p_pixels, 0,
p_sys->p_info->sequence->width
* p_sys->p_info->sequence->height );
memset( p_pic->p[1].p_pixels, 0x80,
p_sys->p_info->sequence->width
* p_sys->p_info->sequence->height / 4 );
memset( p_pic->p[2].p_pixels, 0x80,
p_sys->p_info->sequence->width
* p_sys->p_info->sequence->height / 4 );
if( p_sys->b_slice_i )
{
decoder_SynchroNewPicture( p_sys->p_synchro,
I_CODING_TYPE, 2, 0, 0,
p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
decoder_SynchroDecode( p_sys->p_synchro );
decoder_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
}
msg_Err( p_dec, "invalid picture encountered" );
/* I don't think we have anything to do, but well without
* docs ... */
break;
}
......@@ -633,6 +582,8 @@ static void CloseDecoder( vlc_object_t *p_this )
decoder_t *p_dec = (decoder_t *)p_this;
decoder_sys_t *p_sys = p_dec->p_sys;
DpbClean( p_dec );
free( p_sys->p_gop_user_data );
if( p_sys->p_synchro ) decoder_SynchroRelease( p_sys->p_synchro );
......@@ -645,7 +596,7 @@ static void CloseDecoder( vlc_object_t *p_this )
/*****************************************************************************
* GetNewPicture: Get a new picture from the vout and set the buf struct
*****************************************************************************/
static picture_t *GetNewPicture( decoder_t *p_dec, uint8_t **pp_buf )
static picture_t *GetNewPicture( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
picture_t *p_pic;
......@@ -676,7 +627,8 @@ static picture_t *GetNewPicture( decoder_t *p_dec, uint8_t **pp_buf )
/* Get a new picture */
p_pic = decoder_NewPicture( p_dec );
if( p_pic == NULL ) return NULL;
if( p_pic == NULL )
return NULL;
p_pic->b_progressive = p_sys->p_info->current_picture != NULL ?
p_sys->p_info->current_picture->flags & PIC_FLAG_PROGRESSIVE_FRAME : 1;
......@@ -685,12 +637,6 @@ static picture_t *GetNewPicture( decoder_t *p_dec, uint8_t **pp_buf )
p_pic->i_nb_fields = p_sys->p_info->current_picture != NULL ?
p_sys->p_info->current_picture->nb_fields : 2;
decoder_LinkPicture( p_dec, p_pic );
pp_buf[0] = p_pic->p[0].p_pixels;
pp_buf[1] = p_pic->p[1].p_pixels;
pp_buf[2] = p_pic->p[2].p_pixels;
return p_pic;
}
......@@ -769,3 +715,128 @@ static void GetAR( decoder_t *p_dec )
(uint32_t)((uint64_t)1001000000 * 27 /
p_sys->p_info->sequence->frame_period % 1001) );
}
/*****************************************************************************
* PutPicture: Put a picture_t in mpeg2 context
*****************************************************************************/
static void PutPicture( decoder_t *p_dec, picture_t *p_picture )
{
decoder_sys_t *p_sys = p_dec->p_sys;
/* */
uint8_t *pp_buf[3];
for( int j = 0; j < 3; j++ )
pp_buf[j] = p_picture ? p_picture->p[j].p_pixels : NULL;
mpeg2_set_buf( p_sys->p_mpeg2dec, pp_buf, p_picture );
/* Completly broken API, why the hell does it suppose
* the stride of the chroma planes ! */
if( p_picture )
mpeg2_stride( p_sys->p_mpeg2dec, p_picture->p[Y_PLANE].i_pitch );
}
/**
* Initialize a virtual Decoded Picture Buffer to workaround
* libmpeg2 deficient API
*/
static void DpbInit( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
for( int i = 0; i < DPB_COUNT; i++ )
p_sys->p_dpb[i].p_picture = NULL;
}
/**
* Empty and reset the current DPB
*/
static void DpbClean( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
for( int i = 0; i < DPB_COUNT; i++ )
{
picture_dpb_t *p = &p_sys->p_dpb[i];
if( !p->p_picture )
continue;
if( p->b_linked )
decoder_UnlinkPicture( p_dec, p->p_picture );
if( !p->b_displayed )
decoder_DeletePicture( p_dec, p->p_picture );
p->p_picture = NULL;
}
}
/**
* Retreive a picture and reserve a place in the DPB
*/
static picture_t *DpbNewPicture( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
picture_dpb_t *p;
int i;
for( i = 0; i < DPB_COUNT; i++ )
{
p = &p_sys->p_dpb[i];
if( !p->p_picture )
break;
}
if( i >= DPB_COUNT )
{
msg_Err( p_dec, "Leaking picture" );
return NULL;
}
p->p_picture = GetNewPicture( p_dec );
if( p->p_picture )
{
decoder_LinkPicture( p_dec, p->p_picture );
p->b_linked = true;
p->b_displayed = false;
p->p_picture->date = 0;
}
return p->p_picture;
}
static picture_dpb_t *DpbFindPicture( decoder_t *p_dec, picture_t *p_picture )
{
decoder_sys_t *p_sys = p_dec->p_sys;
for( int i = 0; i < DPB_COUNT; i++ )
{
picture_dpb_t *p = &p_sys->p_dpb[i];
if( p->p_picture == p_picture )
return p;
}
return NULL;
}
/**
* Unlink the provided picture and ensure that the decoder
* does not own it anymore.
*/
static void DpbUnlinkPicture( decoder_t *p_dec, picture_t *p_picture )
{
picture_dpb_t *p = DpbFindPicture( p_dec, p_picture );
assert( p && p->b_linked );
decoder_UnlinkPicture( p_dec, p->p_picture );
p->b_linked = false;
if( !p->b_displayed )
decoder_DeletePicture( p_dec, p->p_picture );
p->p_picture = NULL;
}
/**
* Mark the provided picture as displayed.
*/
static void DpbDisplayPicture( decoder_t *p_dec, picture_t *p_picture )
{
picture_dpb_t *p = DpbFindPicture( p_dec, p_picture );
assert( p && !p->b_displayed && p->b_linked );
p->b_displayed = true;
}
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