mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-04 09:11:33 +02:00
706 lines
22 KiB
C
706 lines
22 KiB
C
/*****************************************************************************
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* subtitle.c: Demux vobsub files.
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*****************************************************************************
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* Copyright (C) 1999-2004 the VideoLAN team
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* $Id$
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*
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* Authors: Laurent Aimar <fenrir@via.ecp.fr>
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* Derk-Jan Hartman <hartman at videolan dot org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#include <vlc/vlc.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <vlc_demux.h>
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#include <vlc_charset.h>
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#include "ps.h"
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#define MAX_LINE 8192
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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static int Open ( vlc_object_t *p_this );
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static void Close( vlc_object_t *p_this );
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vlc_module_begin();
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set_description( _("Vobsub subtitles parser") );
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set_category( CAT_INPUT );
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set_subcategory( SUBCAT_INPUT_DEMUX );
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set_capability( "demux2", 1 );
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set_callbacks( Open, Close );
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add_shortcut( "vobsub" );
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add_shortcut( "subtitle" );
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vlc_module_end();
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/*****************************************************************************
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* Prototypes:
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*****************************************************************************/
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typedef struct
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{
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int i_line_count;
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int i_line;
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char **line;
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} text_t;
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static int TextLoad( text_t *, stream_t *s );
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static void TextUnload( text_t * );
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typedef struct
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{
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int64_t i_start;
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int i_vobsub_location;
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} subtitle_t;
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typedef struct
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{
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es_format_t fmt;
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es_out_id_t *p_es;
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int i_track_id;
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int i_current_subtitle;
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int i_subtitles;
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subtitle_t *p_subtitles;
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int64_t i_delay;
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} vobsub_track_t;
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struct demux_sys_t
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{
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int64_t i_next_demux_date;
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int64_t i_length;
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text_t txt;
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stream_t *p_vobsub_stream;
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/* all tracks */
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int i_tracks;
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vobsub_track_t *track;
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int i_original_frame_width;
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int i_original_frame_height;
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vlc_bool_t b_palette;
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uint32_t palette[16];
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};
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static int Demux( demux_t * );
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static int Control( demux_t *, int, va_list );
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static int ParseVobSubIDX( demux_t * );
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static int DemuxVobSub( demux_t *, block_t *);
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/*****************************************************************************
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* Module initializer
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*****************************************************************************/
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static int Open ( vlc_object_t *p_this )
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{
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demux_t *p_demux = (demux_t*)p_this;
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demux_sys_t *p_sys;
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char *psz_vobname, *s;
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int i_len;
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if( ( s = stream_ReadLine( p_demux->s ) ) != NULL )
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{
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if( !strcasestr( s, "# VobSub index file" ) )
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{
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msg_Dbg( p_demux, "this doesn't seem to be a vobsub file" );
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free( s );
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if( stream_Seek( p_demux->s, 0 ) )
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{
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msg_Warn( p_demux, "failed to rewind" );
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}
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return VLC_EGENERIC;
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}
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free( s );
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}
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else
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{
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msg_Dbg( p_demux, "could not read vobsub IDX file" );
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return VLC_EGENERIC;
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}
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p_demux->pf_demux = Demux;
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p_demux->pf_control = Control;
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p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
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p_sys->i_length = 0;
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p_sys->p_vobsub_stream = NULL;
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p_sys->i_tracks = 0;
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p_sys->track = (vobsub_track_t *)malloc( sizeof( vobsub_track_t ) );
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p_sys->i_original_frame_width = -1;
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p_sys->i_original_frame_height = -1;
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p_sys->b_palette = VLC_FALSE;
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memset( p_sys->palette, 0, 16 * sizeof( uint32_t ) );
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/* Load the whole file */
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TextLoad( &p_sys->txt, p_demux->s );
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/* Parse it */
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ParseVobSubIDX( p_demux );
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/* Unload */
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TextUnload( &p_sys->txt );
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/* Find the total length of the vobsubs */
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if( p_sys->i_tracks > 0 )
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{
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int i;
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for( i = 0; i < p_sys->i_tracks; i++ )
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{
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if( p_sys->track[i].i_subtitles > 1 )
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{
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if( p_sys->track[i].p_subtitles[p_sys->track[i].i_subtitles-1].i_start > p_sys->i_length )
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p_sys->i_length = (int64_t) p_sys->track[i].p_subtitles[p_sys->track[i].i_subtitles-1].i_start + ( 1 *1000 *1000 );
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}
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}
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}
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asprintf( &psz_vobname, "%s://%s", p_demux->psz_access, p_demux->psz_path );
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i_len = strlen( psz_vobname );
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if( i_len >= 4 ) memcpy( psz_vobname + i_len - 4, ".sub", 4 );
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/* open file */
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p_sys->p_vobsub_stream = stream_UrlNew( p_demux, psz_vobname );
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if( p_sys->p_vobsub_stream == NULL )
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{
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msg_Err( p_demux, "couldn't open .sub Vobsub file: %s",
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psz_vobname );
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free( psz_vobname );
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free( p_sys );
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return VLC_EGENERIC;
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}
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free( psz_vobname );
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* Close: Close subtitle demux
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*****************************************************************************/
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static void Close( vlc_object_t *p_this )
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{
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int i;
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demux_t *p_demux = (demux_t*)p_this;
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demux_sys_t *p_sys = p_demux->p_sys;
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/* Clean all subs from all tracks */
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for( i = 0; i < p_sys->i_tracks; i++ )
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{
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if( p_sys->track[i].p_subtitles ) free( p_sys->track[i].p_subtitles );
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}
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if( p_sys->track ) free( p_sys->track );
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if( p_sys->p_vobsub_stream )
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stream_Delete( p_sys->p_vobsub_stream );
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free( p_sys );
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}
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/*****************************************************************************
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* Control:
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*****************************************************************************/
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static int Control( demux_t *p_demux, int i_query, va_list args )
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{
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demux_sys_t *p_sys = p_demux->p_sys;
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int64_t *pi64, i64;
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int i;
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double *pf, f;
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switch( i_query )
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{
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case DEMUX_GET_LENGTH:
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pi64 = (int64_t*)va_arg( args, int64_t * );
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*pi64 = (int64_t) p_sys->i_length;
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return VLC_SUCCESS;
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case DEMUX_GET_TIME:
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pi64 = (int64_t*)va_arg( args, int64_t * );
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for( i = 0; i < p_sys->i_tracks; i++ )
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{
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vlc_bool_t b_selected;
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/* Check the ES is selected */
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es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
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p_sys->track[i].p_es, &b_selected );
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if( b_selected ) break;
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}
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if( i < p_sys->i_tracks && p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles )
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{
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*pi64 = p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start;
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return VLC_SUCCESS;
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}
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return VLC_EGENERIC;
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case DEMUX_SET_TIME:
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i64 = (int64_t)va_arg( args, int64_t );
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for( i = 0; i < p_sys->i_tracks; i++ )
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{
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p_sys->track[i].i_current_subtitle = 0;
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while( p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles &&
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p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start < i64 )
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{
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p_sys->track[i].i_current_subtitle++;
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}
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if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
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return VLC_EGENERIC;
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}
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return VLC_SUCCESS;
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case DEMUX_GET_POSITION:
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pf = (double*)va_arg( args, double * );
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for( i = 0; i < p_sys->i_tracks; i++ )
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{
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vlc_bool_t b_selected;
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/* Check the ES is selected */
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es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
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p_sys->track[i].p_es, &b_selected );
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if( b_selected ) break;
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}
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if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
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{
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*pf = 1.0;
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}
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else if( p_sys->track[i].i_subtitles > 0 )
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{
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*pf = (double)p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start /
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(double)p_sys->i_length;
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}
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else
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{
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*pf = 0.0;
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}
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return VLC_SUCCESS;
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case DEMUX_SET_POSITION:
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f = (double)va_arg( args, double );
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i64 = (int64_t) f * p_sys->i_length;
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for( i = 0; i < p_sys->i_tracks; i++ )
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{
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p_sys->track[i].i_current_subtitle = 0;
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while( p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles &&
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p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start < i64 )
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{
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p_sys->track[i].i_current_subtitle++;
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}
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if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
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return VLC_EGENERIC;
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}
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return VLC_SUCCESS;
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case DEMUX_SET_NEXT_DEMUX_TIME:
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p_sys->i_next_demux_date = (int64_t)va_arg( args, int64_t );
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return VLC_SUCCESS;
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case DEMUX_GET_FPS:
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case DEMUX_GET_META:
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case DEMUX_GET_TITLE_INFO:
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return VLC_EGENERIC;
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default:
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msg_Err( p_demux, "unknown query in subtitle control" );
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return VLC_EGENERIC;
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}
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}
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/*****************************************************************************
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* Demux: Send subtitle to decoder
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*****************************************************************************/
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static int Demux( demux_t *p_demux )
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{
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demux_sys_t *p_sys = p_demux->p_sys;
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int64_t i_maxdate;
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int i;
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for( i = 0; i < p_sys->i_tracks; i++ )
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{
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#define tk p_sys->track[i]
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if( tk.i_current_subtitle >= tk.i_subtitles )
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continue;
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i_maxdate = (int64_t) p_sys->i_next_demux_date;
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if( i_maxdate <= 0 && tk.i_current_subtitle < tk.i_subtitles )
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{
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/* Should not happen */
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i_maxdate = (int64_t) tk.p_subtitles[tk.i_current_subtitle].i_start + 1;
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}
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while( tk.i_current_subtitle < tk.i_subtitles &&
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tk.p_subtitles[tk.i_current_subtitle].i_start < i_maxdate )
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{
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int i_pos = tk.p_subtitles[tk.i_current_subtitle].i_vobsub_location;
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block_t *p_block;
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int i_size = 0;
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/* first compute SPU size */
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if( tk.i_current_subtitle + 1 < tk.i_subtitles )
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{
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i_size = tk.p_subtitles[tk.i_current_subtitle+1].i_vobsub_location - i_pos;
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}
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if( i_size <= 0 ) i_size = 65535; /* Invalid or EOF */
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/* Seek at the right place */
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if( stream_Seek( p_sys->p_vobsub_stream, i_pos ) )
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{
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msg_Warn( p_demux,
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"cannot seek in the VobSub to the correct time %d", i_pos );
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tk.i_current_subtitle++;
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continue;
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}
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/* allocate a packet */
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if( ( p_block = block_New( p_demux, i_size ) ) == NULL )
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{
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tk.i_current_subtitle++;
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continue;
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}
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/* read data */
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p_block->i_buffer = stream_Read( p_sys->p_vobsub_stream, p_block->p_buffer, i_size );
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if( p_block->i_buffer <= 6 )
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{
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block_Release( p_block );
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tk.i_current_subtitle++;
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continue;
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}
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/* pts */
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p_block->i_pts = tk.p_subtitles[tk.i_current_subtitle].i_start;
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/* demux this block */
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DemuxVobSub( p_demux, p_block );
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tk.i_current_subtitle++;
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}
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#undef tk
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}
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/* */
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p_sys->i_next_demux_date = 0;
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return 1;
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}
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static int TextLoad( text_t *txt, stream_t *s )
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{
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int i_line_max;
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/* init txt */
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i_line_max = 500;
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txt->i_line_count = 0;
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txt->i_line = 0;
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txt->line = calloc( i_line_max, sizeof( char * ) );
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/* load the complete file */
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for( ;; )
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{
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char *psz = stream_ReadLine( s );
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if( psz == NULL )
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break;
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txt->line[txt->i_line_count++] = psz;
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if( txt->i_line_count >= i_line_max )
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{
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i_line_max += 100;
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txt->line = realloc( txt->line, i_line_max * sizeof( char*) );
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}
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}
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if( txt->i_line_count <= 0 )
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{
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if( txt->line ) free( txt->line );
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return VLC_EGENERIC;
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}
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return VLC_SUCCESS;
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}
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static void TextUnload( text_t *txt )
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{
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int i;
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for( i = 0; i < txt->i_line_count; i++ )
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{
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if( txt->line[i] ) free( txt->line[i] );
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}
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if( txt->line ) free( txt->line );
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txt->i_line = 0;
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txt->i_line_count = 0;
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}
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static char *TextGetLine( text_t *txt )
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{
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if( txt->i_line >= txt->i_line_count )
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return( NULL );
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return txt->line[txt->i_line++];
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}
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static int ParseVobSubIDX( demux_t *p_demux )
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{
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demux_sys_t *p_sys = p_demux->p_sys;
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text_t *txt = &p_sys->txt;
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char *line;
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vobsub_track_t *current_tk;
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for( ;; )
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{
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if( ( line = TextGetLine( txt ) ) == NULL )
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{
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return( VLC_EGENERIC );
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}
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if( *line == 0 || *line == '\r' || *line == '\n' || *line == '#' )
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continue;
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else if( !strncmp( "size:", line, 5 ) )
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{
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/* Store the original size of the video */
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if( sscanf( line, "size: %dx%d",
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&p_sys->i_original_frame_width, &p_sys->i_original_frame_height ) == 2 )
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{
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msg_Dbg( p_demux, "original frame size: %dx%d", p_sys->i_original_frame_width, p_sys->i_original_frame_height );
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}
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else
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{
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msg_Warn( p_demux, "reading original frame size failed" );
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}
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}
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else if( !strncmp( "palette:", line, 8 ) )
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{
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int i;
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/* Store the palette of the subs */
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if( sscanf( line, "palette: %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x",
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&p_sys->palette[0], &p_sys->palette[1], &p_sys->palette[2], &p_sys->palette[3],
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|
&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 = VLC_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 = (vobsub_track_t*)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 = (subtitle_t*)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;
|
|
|
|
vobsub_track_t *current_tk = &p_sys->track[p_sys->i_tracks - 1];
|
|
|
|
if( sscanf( line, "timestamp: %d%n:%d:%d:%d, filepos: %x",
|
|
&h, &count, &m, &s, &ms, &loc ) >= 5 )
|
|
{
|
|
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 = (subtitle_t*)realloc( current_tk->p_subtitles, sizeof( subtitle_t ) * (current_tk->i_subtitles + 1 ) );
|
|
current_sub = ¤t_tk->p_subtitles[current_tk->i_subtitles - 1];
|
|
|
|
current_sub->i_start = (int64_t) i_start * i_sign;
|
|
current_sub->i_start += current_tk->i_delay;
|
|
current_sub->i_vobsub_location = i_location;
|
|
}
|
|
}
|
|
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;
|
|
|
|
vobsub_track_t *current_tk = &p_sys->track[p_sys->i_tracks - 1];
|
|
|
|
if( sscanf( line, "%*celay: %d%n:%d:%d:%d",
|
|
&h, &count, &m, &s, &ms ) >= 4 )
|
|
{
|
|
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 );
|
|
}
|
|
}
|
|
}
|
|
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 < 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( 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++ )
|
|
{
|
|
#define tk p_sys->track[i]
|
|
p_pkt->i_dts = p_pkt->i_pts = p_bk->i_pts;
|
|
p_pkt->i_length = 0;
|
|
|
|
if( tk.p_es && tk.i_track_id == i_spu )
|
|
{
|
|
es_out_Send( p_demux->out, tk.p_es, p_pkt );
|
|
p_bk->i_pts = 0; /*only first packet has a pts */
|
|
break;
|
|
}
|
|
else if( i == p_sys->i_tracks - 1 )
|
|
{
|
|
block_Release( p_pkt );
|
|
}
|
|
#undef tk
|
|
}
|
|
}
|
|
|
|
return VLC_SUCCESS;
|
|
}
|