1 /*****************************************************************************
2 * subtitle.c: Demux vobsub files.
3 *****************************************************************************
4 * Copyright (C) 1999-2004 VideoLAN
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Derk-Jan Hartman <hartman at videolan dot org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
31 #include <sys/types.h>
34 #include <vlc/input.h>
35 #include "vlc_video.h"
41 /*****************************************************************************
43 *****************************************************************************/
44 static int Open ( vlc_object_t *p_this );
45 static void Close( vlc_object_t *p_this );
48 set_description( _("Vobsub subtitles demux") );
49 set_capability( "demux2", 1 );
51 set_callbacks( Open, Close );
53 add_shortcut( "vobsub" );
54 add_shortcut( "subtitle" );
57 /*****************************************************************************
59 *****************************************************************************/
67 static int TextLoad( text_t *, stream_t *s );
68 static void TextUnload( text_t * );
73 int i_vobsub_location;
82 int i_current_subtitle;
84 subtitle_t *p_subtitles;
89 int64_t i_next_demux_date;
97 vobsub_track_t *track;
99 int i_original_frame_width;
100 int i_original_frame_height;
103 static int Demux( demux_t * );
104 static int Control( demux_t *, int, va_list );
106 static int ParseVobSubIDX( demux_t * );
107 static int DemuxVobSub( demux_t *, block_t *);
109 /*****************************************************************************
111 *****************************************************************************/
112 static int Open ( vlc_object_t *p_this )
114 demux_t *p_demux = (demux_t*)p_this;
118 p_demux->pf_demux = Demux;
119 p_demux->pf_control = Control;
120 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
121 p_sys->p_vobsub_file = NULL;
123 p_sys->track = (vobsub_track_t*)malloc( sizeof( vobsub_track_t ) );
124 p_sys->i_original_frame_width = -1;
125 p_sys->i_original_frame_height = -1;
128 if( ( s = stream_ReadLine( p_demux->s ) ) != NULL )
130 if( !strcasestr( s, "# VobSub index file" ) )
132 msg_Err( p_demux, "this doesn't seem to be a vobsub file, bailing" );
139 if( stream_Seek( p_demux->s, 0 ) )
141 msg_Warn( p_demux, "failed to rewind" );
146 msg_Err( p_demux, "could not read vobsub IDX file" );
150 /* Load the whole file */
151 TextLoad( &p_sys->txt, p_demux->s );
154 ParseVobSubIDX( p_demux );
157 TextUnload( &p_sys->txt );
159 int i_len = strlen( p_demux->psz_path );
160 char *psz_vobname = strdup( p_demux->psz_path );
162 strcpy( psz_vobname + i_len - 4, ".sub" );
165 if( !( p_sys->p_vobsub_file = fopen( psz_vobname, "rb" ) ) )
167 msg_Err( p_demux, "couldn't open .sub Vobsub file: %s",
175 /*****************************************************************************
176 * Close: Close subtitle demux
177 *****************************************************************************/
178 static void Close( vlc_object_t *p_this )
180 demux_t *p_demux = (demux_t*)p_this;
181 demux_sys_t *p_sys = p_demux->p_sys;
183 /* Clean all subs from all tracks
184 if( p_sys->subtitle )
185 free( p_sys->subtitle );
187 if( p_sys->p_vobsub_file )
188 fclose( p_sys->p_vobsub_file );
193 /*****************************************************************************
195 *****************************************************************************/
196 static int Control( demux_t *p_demux, int i_query, va_list args )
198 demux_sys_t *p_sys = p_demux->p_sys;
204 case DEMUX_GET_LENGTH:
205 pi64 = (int64_t*)va_arg( args, int64_t * );
206 //*pi64 = p_sys->i_length;
210 pi64 = (int64_t*)va_arg( args, int64_t * );
211 /*if( p_sys->i_current_subtitle < p_sys->i_subtitles )
213 *pi64 = p_sys->subtitle[p_sys->i_current_subtitle].i_start;
219 i64 = (int64_t)va_arg( args, int64_t );
220 /*p_sys->i_current_subtitle = 0;
221 while( p_sys->i_current_subtitle < p_sys->i_subtitles &&
222 p_sys->subtitle[p_sys->i_current_subtitle].i_start < i64 )
224 p_sys->i_current_subtitle++;
227 if( p_sys->i_current_subtitle >= p_sys->i_subtitles )
228 return VLC_EGENERIC;*/
231 case DEMUX_GET_POSITION:
232 pf = (double*)va_arg( args, double * );
233 /*if( p_sys->i_current_subtitle >= p_sys->i_subtitles )
237 else if( p_sys->i_subtitles > 0 )
239 *pf = (double)p_sys->subtitle[p_sys->i_current_subtitle].i_start /
240 (double)p_sys->i_length;
248 case DEMUX_SET_POSITION:
249 f = (double)va_arg( args, double );
250 /*i64 = f * p_sys->i_length;
252 p_sys->i_current_subtitle = 0;
253 while( p_sys->i_current_subtitle < p_sys->i_subtitles &&
254 p_sys->subtitle[p_sys->i_current_subtitle].i_start < i64 )
256 p_sys->i_current_subtitle++;
258 if( p_sys->i_current_subtitle >= p_sys->i_subtitles )
259 return VLC_EGENERIC;*/
262 case DEMUX_SET_NEXT_DEMUX_TIME:
263 p_sys->i_next_demux_date = (int64_t)va_arg( args, int64_t );
268 case DEMUX_GET_TITLE_INFO:
272 msg_Err( p_demux, "unknown query in subtitle control" );
277 /*****************************************************************************
278 * Demux: Send subtitle to decoder
279 *****************************************************************************/
280 static int Demux( demux_t *p_demux )
282 demux_sys_t *p_sys = p_demux->p_sys;
286 for( i = 0; i < p_sys->i_tracks; i++ )
288 #define tk p_sys->track[i]
289 if( tk.i_current_subtitle >= tk.i_subtitles )
292 i_maxdate = p_sys->i_next_demux_date;
293 if( i_maxdate <= 0 && tk.i_current_subtitle < tk.i_subtitles )
295 /* Should not happen */
296 i_maxdate = tk.p_subtitles[tk.i_current_subtitle].i_start + 1;
299 while( tk.i_current_subtitle < tk.i_subtitles &&
300 tk.p_subtitles[tk.i_current_subtitle].i_start < i_maxdate )
302 int i_pos = tk.p_subtitles[tk.i_current_subtitle].i_vobsub_location;
306 /* first compute SPU size */
307 if( tk.i_current_subtitle + 1 < tk.i_subtitles )
309 i_size = tk.p_subtitles[tk.i_current_subtitle+1].i_vobsub_location - i_pos;
311 if( i_size <= 0 ) i_size = 65535; /* Invalid or EOF */
313 /* Seek at the right place */
314 if( fseek( p_sys->p_vobsub_file, i_pos, SEEK_SET ) )
317 "cannot seek at right vobsub location %d", i_pos );
318 tk.i_current_subtitle++;
322 /* allocate a packet */
323 if( ( p_block = block_New( p_demux, i_size ) ) == NULL )
325 tk.i_current_subtitle++;
330 p_block->i_buffer = fread( p_block->p_buffer, 1, i_size,
331 p_sys->p_vobsub_file );
332 if( p_block->i_buffer <= 6 )
334 block_Release( p_block );
335 tk.i_current_subtitle++;
340 p_block->i_pts = tk.p_subtitles[tk.i_current_subtitle].i_start;
342 /* demux this block */
343 DemuxVobSub( p_demux, p_block );
345 tk.i_current_subtitle++;
351 p_sys->i_next_demux_date = 0;
356 static int TextLoad( text_t *txt, stream_t *s )
362 txt->i_line_count = 0;
364 txt->line = calloc( i_line_max, sizeof( char * ) );
366 /* load the complete file */
369 char *psz = stream_ReadLine( s );
374 txt->line[txt->i_line_count++] = psz;
375 if( txt->i_line_count >= i_line_max )
378 txt->line = realloc( txt->line, i_line_max * sizeof( char*) );
382 if( txt->i_line_count <= 0 )
390 static void TextUnload( text_t *txt )
394 for( i = 0; i < txt->i_line_count; i++ )
396 free( txt->line[i] );
400 txt->i_line_count = 0;
403 static char *TextGetLine( text_t *txt )
405 if( txt->i_line >= txt->i_line_count )
408 return txt->line[txt->i_line++];
411 static int ParseVobSubIDX( demux_t *p_demux )
413 demux_sys_t *p_sys = p_demux->p_sys;
414 text_t *txt = &p_sys->txt;
416 vobsub_track_t *current_tk;
420 if( ( line = TextGetLine( txt ) ) == NULL )
422 return( VLC_EGENERIC );
425 if( *line == 0 || *line == '\r' || *line == '\n' || *line == '#' )
427 else if( !strncmp( "size:", line, 5 ) )
429 /* Store the original size of the video */
430 if( sscanf( line, "size: %dx%d",
431 &p_sys->i_original_frame_width, &p_sys->i_original_frame_height ) == 2 )
433 msg_Dbg( p_demux, "original frame size: %dx%d", p_sys->i_original_frame_width, p_sys->i_original_frame_height );
437 msg_Warn( p_demux, "reading original frame size failed" );
440 else if( !strncmp( "id:", line, 3 ) )
446 /* Lets start a new track */
447 if( sscanf( line, "id: %2s, index: %d",
448 language, &i_track_id ) == 2 )
451 p_sys->track = (vobsub_track_t*)realloc( p_sys->track, sizeof( vobsub_track_t ) * (p_sys->i_tracks + 1 ) );
454 current_tk = &p_sys->track[p_sys->i_tracks - 1];
455 memset( current_tk, 0, sizeof( vobsub_track_t ) );
456 current_tk->i_current_subtitle = 0;
457 current_tk->i_subtitles = 0;
458 current_tk->p_subtitles = (subtitle_t*)malloc( sizeof( subtitle_t ) );;
459 current_tk->i_track_id = i_track_id;
461 es_format_Init( &fmt, SPU_ES, VLC_FOURCC( 's','p','u',' ' ) );
462 fmt.subs.spu.i_original_frame_width = p_sys->i_original_frame_width;
463 fmt.subs.spu.i_original_frame_height = p_sys->i_original_frame_height;
464 fmt.psz_language = strdup( language );
465 current_tk->p_es = es_out_Add( p_demux->out, &fmt );
467 msg_Dbg( p_demux, "new vobsub track detected" );
471 msg_Warn( p_demux, "reading new track failed" );
474 else if( !strncmp( line, "timestamp:", 10 ) )
477 * timestamp: hh:mm:ss:mss, filepos: loc
478 * loc is the hex location of the spu in the .sub file
481 unsigned int h, m, s, ms, loc;
482 int i_start, i_location = 0;
484 vobsub_track_t *current_tk = &p_sys->track[p_sys->i_tracks - 1];
486 if( sscanf( line, "timestamp: %d:%d:%d:%d, filepos: %x",
487 &h, &m, &s, &ms, &loc ) == 5 )
489 subtitle_t *current_sub;
491 i_start = ( (mtime_t)h * 3600*1000 +
492 (mtime_t)m * 60*1000 +
494 (mtime_t)ms ) * 1000;
497 current_tk->i_subtitles++;
498 current_tk->p_subtitles = (subtitle_t*)realloc( current_tk->p_subtitles, sizeof( subtitle_t ) * (current_tk->i_subtitles + 1 ) );
499 current_sub = ¤t_tk->p_subtitles[current_tk->i_subtitles - 1];
501 current_sub->i_start = i_start;
502 current_sub->i_vobsub_location = i_location;
509 static int DemuxVobSub( demux_t *p_demux, block_t *p_bk )
511 demux_sys_t *p_sys = p_demux->p_sys;
512 uint8_t *p = p_bk->p_buffer;
513 uint8_t *p_end = &p_bk->p_buffer[p_bk->i_buffer];
518 int i_size = ps_pkt_size( p, p_end - p );
527 if( p[0] != 0 || p[1] != 0 || p[2] != 0x01 )
529 msg_Warn( p_demux, "invalid PES" );
535 msg_Dbg( p_demux, "we don't need these ps packets (id=0x1%2.2x)", p[3] );
541 p_pkt = block_New( p_demux, i_size );
542 memcpy( p_pkt->p_buffer, p, i_size);
545 i_id = ps_pkt_id( p_pkt );
546 if( (i_id&0xffe0) != 0xbd20 ||
547 ps_pkt_parse_pes( p_pkt, 1 ) )
549 block_Release( p_pkt );
553 msg_Dbg( p_demux, "SPU track %d size %d", i_spu, i_size );
555 /* FIXME i_spu == determines which of the spu tracks we will show. */
556 for( i = 0; i < p_sys->i_tracks; i++ )
558 #define tk p_sys->track[i]
559 p_pkt->i_dts = p_pkt->i_pts = p_bk->i_pts;
562 if( tk.p_es && tk.i_track_id == i_spu )
564 es_out_Send( p_demux->out, tk.p_es, p_pkt );
565 p_bk->i_pts = 0; /*only first packet has a pts */
568 else if( i == p_sys->i_tracks - 1 )
570 block_Release( p_pkt );