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Commit 5ad76c55 authored by Gildas Bazin's avatar Gildas Bazin
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* modules/access/vcd/vcd.c: fixed seeking + simplified a bit.

parent 5ddc5a27
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modules/access/vcd/vcd.c
View file @ 5ad76c55
......@@ -78,7 +78,6 @@ struct access_sys_t
static block_t *Block( access_t * );
static int Seek( access_t *, int64_t );
static int Control( access_t *, int, va_list );
static int EntryPoints( access_t * );
/*****************************************************************************
......@@ -189,13 +188,15 @@ static int Open( vlc_object_t *p_this )
p_sys->i_sector = p_sys->p_sectors[1+i_title];
if( i_chapter > 0 )
{
int64_t i_off = p_sys->title[i_title]->seekpoint[i_chapter]->i_byte_offset;
p_sys->i_sector += i_off / VCD_DATA_SIZE;
p_sys->i_sector +=
( p_sys->title[i_title]->seekpoint[i_chapter]->i_byte_offset /
VCD_DATA_SIZE );
}
p_access->info.i_title = i_title;
p_access->info.i_seekpoint = i_chapter;
p_access->info.i_size = p_sys->title[i_title]->i_size;
p_access->info.i_pos = ( p_sys->i_sector - p_sys->p_sectors[1+i_title] ) * VCD_DATA_SIZE;
p_access->info.i_pos = ( p_sys->i_sector - p_sys->p_sectors[1+i_title] ) *
VCD_DATA_SIZE;
p_access->psz_demux = strdup( "ps" );
......@@ -250,7 +251,7 @@ static int Control( access_t *p_access, int i_query, va_list args )
case ACCESS_GET_PTS_DELAY:
pi_64 = (int64_t*)va_arg( args, int64_t * );
*pi_64 = (int64_t)var_GetInteger( p_access, "vcd-caching" ) * I64C(1000);
*pi_64 = var_GetInteger( p_access, "vcd-caching" ) * 1000;
break;
/* */
......@@ -263,7 +264,7 @@ static int Control( access_t *p_access, int i_query, va_list args )
/* Duplicate title infos */
*pi_int = p_sys->i_titles;
*ppp_title = malloc( sizeof( input_title_t ** ) * p_sys->i_titles );
*ppp_title = malloc( sizeof(input_title_t **) * p_sys->i_titles );
for( i = 0; i < p_sys->i_titles; i++ )
{
(*ppp_title)[i] = vlc_input_title_Duplicate( p_sys->title[i] );
......@@ -275,7 +276,8 @@ static int Control( access_t *p_access, int i_query, va_list args )
if( i != p_access->info.i_title )
{
/* Update info */
p_access->info.i_update |= INPUT_UPDATE_TITLE|INPUT_UPDATE_SEEKPOINT|INPUT_UPDATE_SIZE;
p_access->info.i_update |=
INPUT_UPDATE_TITLE|INPUT_UPDATE_SEEKPOINT|INPUT_UPDATE_SIZE;
p_access->info.i_title = i;
p_access->info.i_seekpoint = 0;
p_access->info.i_size = p_sys->title[i]->i_size;
......@@ -296,10 +298,10 @@ static int Control( access_t *p_access, int i_query, va_list args )
p_access->info.i_seekpoint = i;
p_sys->i_sector = p_sys->p_sectors[1+p_access->info.i_title] +
t->seekpoint[i]->i_byte_offset / VCD_DATA_SIZE;
t->seekpoint[i]->i_byte_offset / VCD_DATA_SIZE;
p_access->info.i_pos = (int64_t)(p_sys->i_sector - p_sys->p_sectors[1+p_access->info.i_title] ) *
(int64_t)VCD_DATA_SIZE;
p_access->info.i_pos = (int64_t)(p_sys->i_sector -
p_sys->p_sectors[1+p_access->info.i_title]) *VCD_DATA_SIZE;
}
return VLC_SUCCESS;
}
......@@ -319,88 +321,78 @@ static block_t *Block( access_t *p_access )
{
access_sys_t *p_sys = p_access->p_sys;
int i_skip = p_access->info.i_pos % VCD_DATA_SIZE;
block_t *p_block;
int i_blocks;
int i_read;
int i;
int i_blocks = VCD_BLOCKS_ONCE;
block_t *p_block;
int i_read;
if( p_access->info.b_eof )
return NULL;
/* Check end of file */
if( p_access->info.b_eof ) return NULL;
/* Read raw data */
i_blocks = VCD_BLOCKS_ONCE;
/* Check end of title */
while( p_sys->i_sector >= p_sys->p_sectors[p_access->info.i_title + 2] )
{
if( p_access->info.i_title + 2 >= p_sys->i_titles )
{
p_access->info.b_eof = VLC_TRUE;
return NULL;
}
/* Don't read after a title */
if( p_sys->i_sector + i_blocks >= p_sys->p_sectors[p_access->info.i_title + 2] )
p_access->info.i_update |=
INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT | INPUT_UPDATE_SIZE;
p_access->info.i_title++;
p_access->info.i_seekpoint = 0;
p_access->info.i_size =
p_sys->title[p_access->info.i_title]->i_size;
p_access->info.i_pos = 0;
}
/* Don't read after the end of a title */
if( p_sys->i_sector + i_blocks >=
p_sys->p_sectors[p_access->info.i_title + 2] )
{
i_blocks = p_sys->p_sectors[p_access->info.i_title + 2 ] - p_sys->i_sector;
if( i_blocks <= 0 ) i_blocks = 1; /* Should never occur */
i_blocks = p_sys->p_sectors[p_access->info.i_title + 2 ] -
p_sys->i_sector;
}
p_block = block_New( p_access, i_blocks * VCD_DATA_SIZE );
/* Do the actual reading */
if( !( p_block = block_New( p_access, i_blocks * VCD_DATA_SIZE ) ) )
{
msg_Err( p_access, "cannot get a new block of size: %i",
i_blocks * VCD_DATA_SIZE );
return NULL;
}
if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev, p_sys->i_sector,
p_block->p_buffer, i_blocks, VCD_TYPE ) < 0 )
if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
p_sys->i_sector, p_block->p_buffer, i_blocks, VCD_TYPE ) < 0 )
{
msg_Err( p_access, "cannot read a sector" );
block_Release( p_block );
p_block = NULL;
i_blocks = 1; /* Next sector */
return NULL;
}
i_read = 0;
for( i = 0; i < i_blocks; i++ )
for( i_read = 0; i_read < i_blocks; i_read++ )
{
input_title_t *t = p_sys->title[p_access->info.i_title];
/* A good sector read */
i_read++;
p_sys->i_sector++;
/* Check end of title */
if( p_sys->i_sector >= p_sys->p_sectors[p_access->info.i_title + 2] )
{
if( p_access->info.i_title + 2 >= p_sys->i_titles )
{
p_access->info.b_eof = VLC_TRUE;
break;
}
p_access->info.i_update |= INPUT_UPDATE_TITLE|INPUT_UPDATE_SEEKPOINT|INPUT_UPDATE_SIZE;
p_access->info.i_title++;
p_access->info.i_seekpoint = 0;
p_access->info.i_size = p_sys->title[p_access->info.i_title]->i_size;
p_access->info.i_pos = 0;
}
else if( t->i_seekpoint > 0 &&
p_access->info.i_seekpoint + 1 < t->i_seekpoint &&
p_access->info.i_pos - i_skip + i_read * VCD_DATA_SIZE >= t->seekpoint[p_access->info.i_seekpoint+1]->i_byte_offset )
if( t->i_seekpoint > 0 &&
p_access->info.i_seekpoint + 1 < t->i_seekpoint &&
p_access->info.i_pos - i_skip + i_read * VCD_DATA_SIZE >=
t->seekpoint[p_access->info.i_seekpoint+1]->i_byte_offset )
{
fprintf( stderr, "seekpoint change\n" );
msg_Dbg( p_access, "seekpoint change" );
p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
p_access->info.i_seekpoint++;
}
/* TODO */
}
if( i_read <= 0 )
{
block_Release( p_block );
return NULL;
}
if( p_block )
{
/* Really read data */
p_block->i_buffer = i_read * VCD_DATA_SIZE;
/* */
p_block->i_buffer -= i_skip;
p_block->p_buffer += i_skip;
p_access->info.i_pos += p_block->i_buffer;
}
/* Update a few values */
p_block->i_buffer = i_read * VCD_DATA_SIZE;
p_block->i_buffer -= i_skip;
p_block->p_buffer += i_skip;
p_access->info.i_pos += p_block->i_buffer;
return p_block;
}
......@@ -410,11 +402,33 @@ static block_t *Block( access_t *p_access )
*****************************************************************************/
static int Seek( access_t *p_access, int64_t i_pos )
{
return VLC_EGENERIC;
access_sys_t *p_sys = p_access->p_sys;
input_title_t *t = p_sys->title[p_access->info.i_title];
int i_seekpoint;
/* Next sector to read */
p_sys->i_sector = i_pos / VCD_DATA_SIZE +
p_sys->p_sectors[p_access->info.i_title + 1];
/* Update current seekpoint */
for( i_seekpoint = 0; i_seekpoint < t->i_seekpoint; i_seekpoint++ )
{
if( i_seekpoint + 1 >= t->i_seekpoint ) break;
if( i_pos < t->seekpoint[i_seekpoint + 1]->i_byte_offset ) break;
}
if( i_seekpoint != p_access->info.i_seekpoint )
{
msg_Dbg( p_access, "seekpoint change" );
p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
p_access->info.i_seekpoint = i_seekpoint;
}
return VLC_SUCCESS;
}
/*****************************************************************************
* EntryPoints:
* EntryPoints: Reads the information about the entry points on the disc.
*****************************************************************************/
static int EntryPoints( access_t *p_access )
{
......@@ -422,9 +436,7 @@ static int EntryPoints( access_t *p_access )
uint8_t sector[VCD_DATA_SIZE];
entries_sect_t entries;
int i_nb;
int i;
int i_nb, i;
/* Read the entry point sector */
if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
......@@ -458,369 +470,19 @@ static int EntryPoints( access_t *p_access )
BCD_TO_BIN( entries.entry[i].msf.frame ) ));
seekpoint_t *s;
if( i_title < 0 )
continue; /* Should not occur */
if( i_title >= p_sys->i_titles )
continue;
if( i_title < 0 ) continue; /* Should not occur */
if( i_title >= p_sys->i_titles ) continue;
fprintf( stderr, "Entry[%d] title=%d sector=%d\n",
msg_Dbg( p_access, "Entry[%d] title=%d sector=%d\n",
i, i_title, i_sector );
s = vlc_seekpoint_New();
s->i_byte_offset = (i_sector - p_sys->p_sectors[i_title+1]) * VCD_DATA_SIZE;
TAB_APPEND( p_sys->title[i_title]->i_seekpoint, p_sys->title[i_title]->seekpoint, s );
}
s->i_byte_offset = (i_sector - p_sys->p_sectors[i_title+1]) *
VCD_DATA_SIZE;
#if 0
#define i_track BCD_TO_BIN(entries.entry[i].i_track)
/* Reset the i_part_nb for each track */
for( i = 0 ; i < i_nb ; i++ )
{
if( i_track <= p_input->stream.i_area_nb )
{
p_input->stream.pp_areas[i_track-1]->i_part_nb = 0;
}
TAB_APPEND( p_sys->title[i_title]->i_seekpoint,
p_sys->title[i_title]->seekpoint, s );
}
for( i = 0 ; i < i_nb ; i++ )
{
if( i_track <= p_input->stream.i_area_nb )
{
p_sys->p_entries[i_entry_index] =
(MSF_TO_LBA2( BCD_TO_BIN( entries.entry[i].msf.minute ),
BCD_TO_BIN( entries.entry[i].msf.second ),
BCD_TO_BIN( entries.entry[i].msf.frame ) ));
p_input->stream.pp_areas[i_track-1]->i_part_nb ++;
/* if this entry belongs to a new track */
if( i_track != i_previous_track )
{
/* i_plugin_data is used to store the first entry of the area*/
p_input->stream.pp_areas[i_track-1]->i_plugin_data =
i_entry_index;
i_previous_track = i_track;
}
msg_Dbg( p_input, "entry point %i begins at LBA: %i",
i_entry_index, p_sys->p_entries[i_entry_index] );
i_entry_index ++;
p_sys->i_entries_nb ++;
}
else
msg_Warn( p_input, "wrong track number found in entry points" );
}
#undef i_track
return 0;
#endif
return VLC_EGENERIC;
}
#if 0
/*****************************************************************************
* VCDRead: reads from the VCD into PES packets.
*****************************************************************************
* Returns -1 in case of error, 0 in case of EOF, otherwise the number of
* bytes.
*****************************************************************************/
static int VCDRead( input_thread_t * p_input, byte_t * p_buffer,
size_t i_len )
{
access_sys_t *p_sys;
int i_blocks;
int i_index;
int i_read;
byte_t p_last_sector[ VCD_DATA_SIZE ];
p_sys = p_input->p_access_data;
i_read = 0;
/* Compute the number of blocks we have to read */
i_blocks = i_len / VCD_DATA_SIZE;
for ( i_index = 0 ; i_index < i_blocks ; i_index++ )
{
if ( ioctl_ReadSectors( VLC_OBJECT(p_input), p_sys->vcddev,
p_sys->i_sector, p_buffer + i_index * VCD_DATA_SIZE, 1,
VCD_TYPE ) < 0 )
{
msg_Err( p_input, "could not read sector %d", p_sys->i_sector );
return -1;
}
p_sys->i_sector ++;
if ( p_sys->i_sector == p_sys->p_sectors[p_sys->i_track + 1] )
{
input_area_t *p_area;
if ( p_sys->i_track >= p_sys->i_nb_tracks - 1 )
return 0; /* EOF */
vlc_mutex_lock( &p_input->stream.stream_lock );
p_area = p_input->stream.pp_areas[
p_input->stream.p_selected_area->i_id + 1 ];
msg_Dbg( p_input, "new title" );
p_area->i_part = 1;
VCDSetArea( p_input, p_area );
vlc_mutex_unlock( &p_input->stream.stream_lock );
}
/* Update chapter */
else if( p_sys->b_valid_ep &&
/* FIXME kludge so that read does not update chapter
* when a manual chapter change was requested and not
* yet accomplished */
!p_input->stream.p_new_area )
{
int i_entry;
vlc_mutex_lock( &p_input->stream.stream_lock );
i_entry = p_input->stream.p_selected_area->i_plugin_data
/* 1st entry point of the track (area)*/
+ p_input->stream.p_selected_area->i_part - 1;
if( i_entry + 1 < p_sys->i_entries_nb &&
p_sys->i_sector >= p_sys->p_entries[i_entry + 1] )
{
vlc_value_t val;
msg_Dbg( p_input, "new chapter" );
p_input->stream.p_selected_area->i_part ++;
/* Update the navigation variables without triggering
* a callback */
val.i_int = p_input->stream.p_selected_area->i_part;
var_Change( p_input, "chapter", VLC_VAR_SETVALUE, &val, NULL );
}
vlc_mutex_unlock( &p_input->stream.stream_lock );
}
i_read += VCD_DATA_SIZE;
}
if ( i_len % VCD_DATA_SIZE ) /* this should not happen */
{
if ( ioctl_ReadSectors( VLC_OBJECT(p_input), p_sys->vcddev,
p_sys->i_sector, p_last_sector, 1, VCD_TYPE ) < 0 )
{
msg_Err( p_input, "could not read sector %d", p_sys->i_sector );
return -1;
}
p_input->p_vlc->pf_memcpy( p_buffer + i_blocks * VCD_DATA_SIZE,
p_last_sector, i_len % VCD_DATA_SIZE );
i_read += i_len % VCD_DATA_SIZE;
}
return i_read;
}
/*****************************************************************************
* VCDSetProgram: Does nothing since a VCD is mono_program
*****************************************************************************/
static int VCDSetProgram( input_thread_t * p_input,
pgrm_descriptor_t * p_program)
{
return 0;
}
/*****************************************************************************
* VCDSetArea: initialize input data for title x, chapter y.
* It should be called for each user navigation request.
****************************************************************************/
static int VCDSetArea( input_thread_t * p_input, input_area_t * p_area )
{
access_sys_t *p_sys = p_input->p_access_data;
vlc_value_t val;
/* we can't use the interface slider until initilization is complete */
p_input->stream.b_seekable = 0;
if( p_area != p_input->stream.p_selected_area )
{
unsigned int i;
/* Reset the Chapter position of the current title */
p_input->stream.p_selected_area->i_part = 1;
p_input->stream.p_selected_area->i_tell = 0;
/* Change the default area */
p_input->stream.p_selected_area = p_area;
/* Change the current track */
/* The first track is not a valid one */
p_sys->i_track = p_area->i_id;
p_sys->i_sector = p_sys->p_sectors[p_sys->i_track];
/* Update the navigation variables without triggering a callback */
val.i_int = p_area->i_id;
var_Change( p_input, "title", VLC_VAR_SETVALUE, &val, NULL );
var_Change( p_input, "chapter", VLC_VAR_CLEARCHOICES, NULL, NULL );
for( i = 1; i <= p_area->i_part_nb; i++ )
{
val.i_int = i;
var_Change( p_input, "chapter", VLC_VAR_ADDCHOICE, &val, NULL );
}
}
if( p_sys->b_valid_ep )
{
int i_entry = p_area->i_plugin_data /* 1st entry point of
the track (area)*/
+ p_area->i_part - 1;
p_sys->i_sector = p_sys->p_entries[i_entry];
}
else
p_sys->i_sector = p_sys->p_sectors[p_sys->i_track];
p_input->stream.p_selected_area->i_tell =
(off_t)p_sys->i_sector * (off_t)VCD_DATA_SIZE
- p_input->stream.p_selected_area->i_start;
/* warn interface that something has changed */
p_input->stream.b_seekable = 1;
p_input->stream.b_changed = 1;
/* Update the navigation variables without triggering a callback */
val.i_int = p_area->i_part;
var_Change( p_input, "chapter", VLC_VAR_SETVALUE, &val, NULL );
return 0;
}
/****************************************************************************
* VCDSeek
****************************************************************************/
static void VCDSeek( input_thread_t * p_input, off_t i_off )
{
access_sys_t * p_sys = p_input->p_access_data;
unsigned int i_index;
p_sys->i_sector = p_sys->p_sectors[p_sys->i_track]
+ i_off / (off_t)VCD_DATA_SIZE;
vlc_mutex_lock( &p_input->stream.stream_lock );
#define p_area p_input->stream.p_selected_area
/* Find chapter */
if( p_sys->b_valid_ep )
{
for( i_index = 2 ; i_index <= p_area->i_part_nb; i_index ++ )
{
if( p_sys->i_sector < p_sys->p_entries[p_area->i_plugin_data
+ i_index - 1] )
{
vlc_value_t val;
p_area->i_part = i_index - 1;
/* Update the navigation variables without triggering
* a callback */
val.i_int = p_area->i_part;
var_Change( p_input, "chapter", VLC_VAR_SETVALUE, &val, NULL );
break;
}
}
}
#undef p_area
p_input->stream.p_selected_area->i_tell =
(off_t)p_sys->i_sector * (off_t)VCD_DATA_SIZE
- p_input->stream.p_selected_area->i_start;
vlc_mutex_unlock( &p_input->stream.stream_lock );
}
/*****************************************************************************
* VCDEntryPoints: Reads the information about the entry points on the disc.
*****************************************************************************/
static int VCDEntryPoints( input_thread_t * p_input )
{
access_sys_t * p_sys = p_input->p_access_data;
byte_t * p_sector;
entries_sect_t entries;
uint16_t i_nb;
int i, i_entry_index = 0;
int i_previous_track = -1;
p_sector = malloc( VCD_DATA_SIZE * sizeof( byte_t ) );
if( p_sector == NULL )
{
msg_Err( p_input, "not enough memory for entry points treatment" );
return -1;
}
if( ioctl_ReadSectors( VLC_OBJECT(p_input), p_sys->vcddev,
VCD_ENTRIES_SECTOR, p_sector, 1, VCD_TYPE ) < 0 )
{
msg_Err( p_input, "could not read entry points sector" );
free( p_sector );
return( -1 );
}
memcpy( &entries, p_sector, CD_SECTOR_SIZE );
free( p_sector );
if( (i_nb = U16_AT( &entries.i_entries_nb )) > 500 )
{
msg_Err( p_input, "invalid entry points number" );
return( -1 );
}
p_sys->p_entries = malloc( sizeof( int ) * i_nb );
if( p_sys->p_entries == NULL )
{
msg_Err( p_input, "not enough memory for entry points treatment" );
return -1;
}
if( strncmp( entries.psz_id, "ENTRYVCD", sizeof( entries.psz_id ) )
&& strncmp( entries.psz_id, "ENTRYSVD", sizeof( entries.psz_id ) ))
{
msg_Err( p_input, "unrecognized entry points format" );
free( p_sys->p_entries );
return -1;
}
p_sys->i_entries_nb = 0;
#define i_track BCD_TO_BIN(entries.entry[i].i_track)
/* Reset the i_part_nb for each track */
for( i = 0 ; i < i_nb ; i++ )
{
if( i_track <= p_input->stream.i_area_nb )
{
p_input->stream.pp_areas[i_track-1]->i_part_nb = 0;
}
}
for( i = 0 ; i < i_nb ; i++ )
{
if( i_track <= p_input->stream.i_area_nb )
{
p_sys->p_entries[i_entry_index] =
(MSF_TO_LBA2( BCD_TO_BIN( entries.entry[i].msf.minute ),
BCD_TO_BIN( entries.entry[i].msf.second ),
BCD_TO_BIN( entries.entry[i].msf.frame ) ));
p_input->stream.pp_areas[i_track-1]->i_part_nb ++;
/* if this entry belongs to a new track */
if( i_track != i_previous_track )
{
/* i_plugin_data is used to store the first entry of the area*/
p_input->stream.pp_areas[i_track-1]->i_plugin_data =
i_entry_index;
i_previous_track = i_track;
}
msg_Dbg( p_input, "entry point %i begins at LBA: %i",
i_entry_index, p_sys->p_entries[i_entry_index] );
i_entry_index ++;
p_sys->i_entries_nb ++;
}
else
msg_Warn( p_input, "wrong track number found in entry points" );
}
#undef i_track
return 0;
return VLC_SUCCESS;
}
#endif
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