vobsub.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:23k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * subtitle.c: Demux vobsub files.
- *****************************************************************************
- * Copyright (C) 1999-2004 the VideoLAN team
- * $Id: bb0a47e7c74db913125eb1c8e4115234dcc0e696 $
- *
- * 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 = n;
- txt->i_line = 0;
- 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[3];
- 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 ) );
- language[2] = ' ';
- /* 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 = 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 = ¤t_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;
- }