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vlc/modules/demux/vobsub.c

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/*****************************************************************************
* subtitle.c: Demux vobsub files.
*****************************************************************************
* Copyright (C) 1999-2004 the VideoLAN team
* $Id$
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Derk-Jan Hartman <hartman at videolan dot org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <errno.h>
#include <sys/types.h>
#include <limits.h>
#include <vlc_demux.h>
#include <vlc_charset.h>
#include "ps.h"
#define MAX_LINE 8192
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t *p_this );
static void Close( vlc_object_t *p_this );
vlc_module_begin ()
set_description( N_("Vobsub subtitles parser") )
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_DEMUX )
set_capability( "demux", 1 )
set_callbacks( Open, Close )
add_shortcut( "vobsub" )
add_shortcut( "subtitle" )
vlc_module_end ()
/*****************************************************************************
* Prototypes:
*****************************************************************************/
typedef struct
{
int i_line_count;
int i_line;
char **line;
} text_t;
static int TextLoad( text_t *, stream_t *s );
static void TextUnload( text_t * );
typedef struct
{
int64_t i_start;
int i_vobsub_location;
} subtitle_t;
typedef struct
{
es_format_t fmt;
es_out_id_t *p_es;
int i_track_id;
int i_current_subtitle;
int i_subtitles;
subtitle_t *p_subtitles;
int64_t i_delay;
} vobsub_track_t;
struct demux_sys_t
{
int64_t i_next_demux_date;
int64_t i_length;
text_t txt;
stream_t *p_vobsub_stream;
/* all tracks */
int i_tracks;
vobsub_track_t *track;
int i_original_frame_width;
int i_original_frame_height;
bool b_palette;
uint32_t palette[16];
};
static int Demux( demux_t * );
static int Control( demux_t *, int, va_list );
static int ParseVobSubIDX( demux_t * );
static int DemuxVobSub( demux_t *, block_t *);
/*****************************************************************************
* Module initializer
*****************************************************************************/
static int Open ( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
char *psz_vobname, *s;
int i_len;
if( ( s = stream_ReadLine( p_demux->s ) ) != NULL )
{
if( !strcasestr( s, "# VobSub index file" ) )
{
msg_Dbg( p_demux, "this doesn't seem to be a vobsub file" );
free( s );
if( stream_Seek( p_demux->s, 0 ) )
{
msg_Warn( p_demux, "failed to rewind" );
}
return VLC_EGENERIC;
}
free( s );
}
else
{
msg_Dbg( p_demux, "could not read vobsub IDX file" );
return VLC_EGENERIC;
}
p_demux->pf_demux = Demux;
p_demux->pf_control = Control;
p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
p_sys->i_length = 0;
p_sys->p_vobsub_stream = NULL;
p_sys->i_tracks = 0;
p_sys->track = (vobsub_track_t *)malloc( sizeof( vobsub_track_t ) );
p_sys->i_original_frame_width = -1;
p_sys->i_original_frame_height = -1;
p_sys->b_palette = false;
memset( p_sys->palette, 0, 16 * sizeof( uint32_t ) );
/* Load the whole file */
TextLoad( &p_sys->txt, p_demux->s );
/* Parse it */
ParseVobSubIDX( p_demux );
/* Unload */
TextUnload( &p_sys->txt );
/* Find the total length of the vobsubs */
if( p_sys->i_tracks > 0 )
{
int i;
for( i = 0; i < p_sys->i_tracks; i++ )
{
if( p_sys->track[i].i_subtitles > 1 )
{
if( p_sys->track[i].p_subtitles[p_sys->track[i].i_subtitles-1].i_start > p_sys->i_length )
p_sys->i_length = (int64_t) p_sys->track[i].p_subtitles[p_sys->track[i].i_subtitles-1].i_start + ( 1 *1000 *1000 );
}
}
}
if( asprintf( &psz_vobname, "%s://%s", p_demux->psz_access, p_demux->psz_path ) == -1 )
{
free( p_sys );
return VLC_EGENERIC;
}
i_len = strlen( psz_vobname );
if( i_len >= 4 ) memcpy( psz_vobname + i_len - 4, ".sub", 4 );
/* open file */
p_sys->p_vobsub_stream = stream_UrlNew( p_demux, psz_vobname );
if( p_sys->p_vobsub_stream == NULL )
{
msg_Err( p_demux, "couldn't open .sub Vobsub file: %s",
psz_vobname );
free( psz_vobname );
free( p_sys );
return VLC_EGENERIC;
}
free( psz_vobname );
return VLC_SUCCESS;
}
/*****************************************************************************
* Close: Close subtitle demux
*****************************************************************************/
static void Close( vlc_object_t *p_this )
{
int i;
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
/* Clean all subs from all tracks */
for( i = 0; i < p_sys->i_tracks; i++ )
free( p_sys->track[i].p_subtitles );
free( p_sys->track );
if( p_sys->p_vobsub_stream )
stream_Delete( p_sys->p_vobsub_stream );
free( p_sys );
}
/*****************************************************************************
* Control:
*****************************************************************************/
static int Control( demux_t *p_demux, int i_query, va_list args )
{
demux_sys_t *p_sys = p_demux->p_sys;
int64_t *pi64, i64;
int i;
double *pf, f;
switch( i_query )
{
case DEMUX_GET_LENGTH:
pi64 = (int64_t*)va_arg( args, int64_t * );
*pi64 = (int64_t) p_sys->i_length;
return VLC_SUCCESS;
case DEMUX_GET_TIME:
pi64 = (int64_t*)va_arg( args, int64_t * );
for( i = 0; i < p_sys->i_tracks; i++ )
{
bool b_selected;
/* Check the ES is selected */
es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
p_sys->track[i].p_es, &b_selected );
if( b_selected ) break;
}
if( i < p_sys->i_tracks && p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles )
{
*pi64 = p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start;
return VLC_SUCCESS;
}
return VLC_EGENERIC;
case DEMUX_SET_TIME:
i64 = (int64_t)va_arg( args, int64_t );
for( i = 0; i < p_sys->i_tracks; i++ )
{
p_sys->track[i].i_current_subtitle = 0;
while( p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles &&
p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start < i64 )
{
p_sys->track[i].i_current_subtitle++;
}
if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
return VLC_EGENERIC;
}
return VLC_SUCCESS;
case DEMUX_GET_POSITION:
pf = (double*)va_arg( args, double * );
for( i = 0; i < p_sys->i_tracks; i++ )
{
bool b_selected;
/* Check the ES is selected */
es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
p_sys->track[i].p_es, &b_selected );
if( b_selected ) break;
}
if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
{
*pf = 1.0;
}
else if( p_sys->track[i].i_subtitles > 0 )
{
*pf = (double)p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start /
(double)p_sys->i_length;
}
else
{
*pf = 0.0;
}
return VLC_SUCCESS;
case DEMUX_SET_POSITION:
f = (double)va_arg( args, double );
i64 = (int64_t) f * p_sys->i_length;
for( i = 0; i < p_sys->i_tracks; i++ )
{
p_sys->track[i].i_current_subtitle = 0;
while( p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles &&
p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start < i64 )
{
p_sys->track[i].i_current_subtitle++;
}
if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
return VLC_EGENERIC;
}
return VLC_SUCCESS;
case DEMUX_SET_NEXT_DEMUX_TIME:
p_sys->i_next_demux_date = (int64_t)va_arg( args, int64_t );
return VLC_SUCCESS;
case DEMUX_GET_FPS:
case DEMUX_GET_META:
case DEMUX_GET_TITLE_INFO:
case DEMUX_HAS_UNSUPPORTED_META:
case DEMUX_GET_ATTACHMENTS:
case DEMUX_CAN_RECORD:
return VLC_EGENERIC;
default:
msg_Warn( p_demux, "unknown query in subtitle control" );
return VLC_EGENERIC;
}
}
/*****************************************************************************
* Demux: Send subtitle to decoder
*****************************************************************************/
static int Demux( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
int64_t i_maxdate;
int i, i_read;
for( i = 0; i < p_sys->i_tracks; i++ )
{
#define tk p_sys->track[i]
if( tk.i_current_subtitle >= tk.i_subtitles )
continue;
i_maxdate = p_sys->i_next_demux_date;
if( i_maxdate <= 0 && tk.i_current_subtitle < tk.i_subtitles )
{
/* Should not happen */
i_maxdate = tk.p_subtitles[tk.i_current_subtitle].i_start + 1;
}
while( tk.i_current_subtitle < tk.i_subtitles &&
tk.p_subtitles[tk.i_current_subtitle].i_start < i_maxdate )
{
int i_pos = tk.p_subtitles[tk.i_current_subtitle].i_vobsub_location;
block_t *p_block;
int i_size = 0;
/* first compute SPU size */
if( tk.i_current_subtitle + 1 < tk.i_subtitles )
{
i_size = tk.p_subtitles[tk.i_current_subtitle+1].i_vobsub_location - i_pos;
}
if( i_size <= 0 ) i_size = 65535; /* Invalid or EOF */
/* Seek at the right place */
if( stream_Seek( p_sys->p_vobsub_stream, i_pos ) )
{
msg_Warn( p_demux,
"cannot seek in the VobSub to the correct time %d", i_pos );
tk.i_current_subtitle++;
continue;
}
/* allocate a packet */
if( ( p_block = block_New( p_demux, i_size ) ) == NULL )
{
tk.i_current_subtitle++;
continue;
}
/* read data */
i_read = stream_Read( p_sys->p_vobsub_stream, p_block->p_buffer, i_size );
if( i_read <= 6 )
{
block_Release( p_block );
tk.i_current_subtitle++;
continue;
}
p_block->i_buffer = i_read;
/* pts */
p_block->i_pts = tk.p_subtitles[tk.i_current_subtitle].i_start;
/* demux this block */
DemuxVobSub( p_demux, p_block );
tk.i_current_subtitle++;
}
#undef tk
}
/* */
p_sys->i_next_demux_date = 0;
return 1;
}
static int TextLoad( text_t *txt, stream_t *s )
{
char **lines = NULL;
size_t n = 0;
/* load the complete file */
for( ;; )
{
char *psz = stream_ReadLine( s );
char **ppsz_new;
if( psz == NULL || (n >= INT_MAX/sizeof(char *)) )
break;
ppsz_new = realloc( lines, (n + 1) * sizeof (char *) );
if( ppsz_new == NULL )
{
free( psz );
break;
}
lines = ppsz_new;
lines[n++] = psz;
}
txt->i_line_count = 0;
txt->i_line = n;
txt->line = lines;
return VLC_SUCCESS;
}
static void TextUnload( text_t *txt )
{
int i;
for( i = 0; i < txt->i_line_count; i++ )
free( txt->line[i] );
free( txt->line );
txt->i_line = 0;
txt->i_line_count = 0;
}
static char *TextGetLine( text_t *txt )
{
if( txt->i_line >= txt->i_line_count )
return( NULL );
return txt->line[txt->i_line++];
}
static int ParseVobSubIDX( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
text_t *txt = &p_sys->txt;
char *line;
vobsub_track_t *current_tk = NULL;
for( ;; )
{
if( ( line = TextGetLine( txt ) ) == NULL )
{
return( VLC_EGENERIC );
}
if( *line == 0 || *line == '\r' || *line == '\n' || *line == '#' )
{
continue;
}
else if( !strncmp( "size:", line, 5 ) )
{
/* Store the original size of the video */
if( sscanf( line, "size: %dx%d",
&p_sys->i_original_frame_width, &p_sys->i_original_frame_height ) == 2 )
{
msg_Dbg( p_demux, "original frame size: %dx%d", p_sys->i_original_frame_width, p_sys->i_original_frame_height );
}
else
{
msg_Warn( p_demux, "reading original frame size failed" );
}
}
else if( !strncmp( "palette:", line, 8 ) )
{
int i;
/* Store the palette of the subs */
if( sscanf( line, "palette: %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x",
&p_sys->palette[0], &p_sys->palette[1], &p_sys->palette[2], &p_sys->palette[3],
&p_sys->palette[4], &p_sys->palette[5], &p_sys->palette[6], &p_sys->palette[7],
&p_sys->palette[8], &p_sys->palette[9], &p_sys->palette[10], &p_sys->palette[11],
&p_sys->palette[12], &p_sys->palette[13], &p_sys->palette[14], &p_sys->palette[15] ) == 16 )
{
for( i = 0; i < 16; i++ )
{
uint8_t r = 0, g = 0, b = 0;
uint8_t y = 0, u = 0, v = 0;
r = (p_sys->palette[i] >> 16) & 0xff;
g = (p_sys->palette[i] >> 8) & 0xff;
b = (p_sys->palette[i] >> 0) & 0xff;
/* msg_Dbg( p_demux, "palette %d: R=%x, G=%x, B=%x", i, r, g, b ); */
y = (uint8_t) __MIN(abs(r * 2104 + g * 4130 + b * 802 + 4096 + 131072) >> 13, 235);
u = (uint8_t) __MIN(abs(r * -1214 + g * -2384 + b * 3598 + 4096 + 1048576) >> 13, 240);
v = (uint8_t) __MIN(abs(r * 3598 + g * -3013 + b * -585 + 4096 + 1048576) >> 13, 240);
p_sys->palette[i] = 0;
p_sys->palette[i] |= (y&0xff)<<16;
p_sys->palette[i] |= (u&0xff);
p_sys->palette[i] |= (v&0xff)<<8;
/* msg_Dbg( p_demux, "palette %d: y=%x, u=%x, v=%x", i, y, u, v ); */
}
p_sys->b_palette = true;
msg_Dbg( p_demux, "vobsub palette read" );
}
else
{
msg_Warn( p_demux, "reading original palette failed" );
}
}
else if( !strncmp( "id:", line, 3 ) )
{
char language[20];
int i_track_id;
es_format_t fmt;
/* Lets start a new track */
if( sscanf( line, "id: %2s, index: %d",
language, &i_track_id ) == 2 )
{
p_sys->i_tracks++;
p_sys->track = realloc( p_sys->track, sizeof( vobsub_track_t ) * (p_sys->i_tracks + 1 ) );
/* Init the track */
current_tk = &p_sys->track[p_sys->i_tracks - 1];
memset( current_tk, 0, sizeof( vobsub_track_t ) );
current_tk->i_current_subtitle = 0;
current_tk->i_subtitles = 0;
current_tk->p_subtitles = malloc( sizeof( subtitle_t ) );;
current_tk->i_track_id = i_track_id;
current_tk->i_delay = (int64_t)0;
es_format_Init( &fmt, SPU_ES, VLC_FOURCC( 's','p','u',' ' ) );
fmt.subs.spu.i_original_frame_width = p_sys->i_original_frame_width;
fmt.subs.spu.i_original_frame_height = p_sys->i_original_frame_height;
fmt.psz_language = strdup( language );
if( p_sys->b_palette )
{
fmt.subs.spu.palette[0] = 0xBeef;
memcpy( &fmt.subs.spu.palette[1], p_sys->palette, 16 * sizeof( uint32_t ) );
}
current_tk->p_es = es_out_Add( p_demux->out, &fmt );
msg_Dbg( p_demux, "new vobsub track detected" );
}
else
{
msg_Warn( p_demux, "reading new track failed" );
}
}
else if( !strncmp( line, "timestamp:", 10 ) )
{
/*
* timestamp: [sign]hh:mm:ss:mss, filepos: loc
* loc is the hex location of the spu in the .sub file
*/
int h, m, s, ms, count, loc = 0;
int i_sign = 1;
int64_t i_start, i_location = 0;
if( p_sys->i_tracks > 0 &&
sscanf( line, "timestamp: %d%n:%d:%d:%d, filepos: %x",
&h, &count, &m, &s, &ms, &loc ) >= 5 )
{
vobsub_track_t *current_tk = &p_sys->track[p_sys->i_tracks - 1];
subtitle_t *current_sub;
if( line[count-3] == '-' )
{
i_sign = -1;
h = -h;
}
i_start = (int64_t) ( h * 3600*1000 +
m * 60*1000 +
s * 1000 +
ms ) * 1000;
i_location = loc;
current_tk->i_subtitles++;
current_tk->p_subtitles = realloc( current_tk->p_subtitles, sizeof( subtitle_t ) * (current_tk->i_subtitles + 1 ) );
current_sub = &current_tk->p_subtitles[current_tk->i_subtitles - 1];
current_sub->i_start = i_start * i_sign;
current_sub->i_start += current_tk->i_delay;
current_sub->i_vobsub_location = i_location;
}
else
{
msg_Warn( p_demux, "reading timestamp failed" );
}
}
else if( !strncasecmp( line, "delay:", 6 ) )
{
/*
* delay: [sign]hh:mm:ss:mss
*/
int h, m, s, ms, count = 0;
int i_sign = 1;
int64_t i_gap = 0;
if( p_sys->i_tracks > 0 &&
sscanf( line, "%*celay: %d%n:%d:%d:%d",
&h, &count, &m, &s, &ms ) >= 4 )
{
vobsub_track_t *current_tk = &p_sys->track[p_sys->i_tracks - 1];
if( line[count-3] == '-' )
{
i_sign = -1;
h = -h;
}
i_gap = (int64_t) ( h * 3600*1000 +
m * 60*1000 +
s * 1000 +
ms ) * 1000;
current_tk->i_delay = current_tk->i_delay + (i_gap * i_sign);
msg_Dbg( p_demux, "sign: %+d gap: %+lld global delay: %+lld",
i_sign, (long long)i_gap,
(long long)current_tk->i_delay );
}
else
{
msg_Warn( p_demux, "reading delay failed" );
}
}
}
return( 0 );
}
static int DemuxVobSub( demux_t *p_demux, block_t *p_bk )
{
demux_sys_t *p_sys = p_demux->p_sys;
uint8_t *p = p_bk->p_buffer;
uint8_t *p_end = &p_bk->p_buffer[p_bk->i_buffer];
int i;
while( p + 6 < p_end )
{
int i_size = ps_pkt_size( p, p_end - p );
block_t *p_pkt;
int i_id;
int i_spu;
if( i_size <= 0 )
break;
if( i_size > p_end - p )
{
msg_Warn( p_demux, "broken PES size" );
break;
}
if( p[0] != 0 || p[1] != 0 || p[2] != 0x01 )
{
msg_Warn( p_demux, "invalid PES" );
break;
}
if( p[3] != 0xbd )
{
/* msg_Dbg( p_demux, "we don't need these ps packets (id=0x1%2.2x)", p[3] ); */
p += i_size;
continue;
}
/* Create a block */
p_pkt = block_New( p_demux, i_size );
memcpy( p_pkt->p_buffer, p, i_size);
p += i_size;
i_id = ps_pkt_id( p_pkt );
if( (i_id&0xffe0) != 0xbd20 ||
ps_pkt_parse_pes( p_pkt, 1 ) )
{
block_Release( p_pkt );
continue;
}
i_spu = i_id&0x1f;
/* msg_Dbg( p_demux, "SPU track %d size %d", i_spu, i_size ); */
for( i = 0; i < p_sys->i_tracks; i++ )
{
vobsub_track_t *p_tk = &p_sys->track[i];
p_pkt->i_dts = p_pkt->i_pts = p_bk->i_pts;
p_pkt->i_length = 0;
if( p_tk->p_es && p_tk->i_track_id == i_spu )
{
es_out_Send( p_demux->out, p_tk->p_es, p_pkt );
p_bk->i_pts = 0; /*only first packet has a pts */
break;
}
}
if( i >= p_sys->i_tracks )
{
block_Release( p_pkt );
}
}
return VLC_SUCCESS;
}