subtitles.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:13k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * subtitles.c
- *****************************************************************************
- * Copyright (C) 2003-2006 the VideoLAN team
- * $Id: c721a7958ef3cdbd0f695d973620c3702638fcb3 $
- *
- * Authors: Derk-Jan Hartman <hartman at videolan.org>
- * This is adapted code from the GPL'ed MPlayer (http://mplayerhq.hu)
- *
- * 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.
- *****************************************************************************/
- /**
- * file
- * This file contains functions to dectect subtitle files.
- */
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include <vlc_input.h>
- #include <vlc_charset.h>
- #ifdef HAVE_DIRENT_H
- # include <dirent.h>
- #endif
- #include <limits.h>
- #ifdef HAVE_UNISTD_H
- # include <unistd.h>
- #endif
- #include <sys/stat.h>
- #include <ctype.h>
- #include "input_internal.h"
- /**
- * We are not going to autodetect more subtitle files than this.
- */
- #define MAX_SUBTITLE_FILES 128
- /**
- * The possible extensions for subtitle files we support
- */
- static const char const sub_exts[][6] = {
- "idx", "sub", "srt",
- "ssa", "ass", "smi",
- "utf", "utf8", "utf-8",
- "txt", "rt", "aqt",
- "usf", "jss", "cdg",
- "psb", "mpsub","mpl2",
- "pjs", "dks",
- ""
- };
- static void strcpy_trim( char *d, const char *s )
- {
- /* skip leading whitespace */
- while( *s && !isalnum(*s) )
- {
- s++;
- }
- for(;;)
- {
- /* copy word */
- while( *s && isalnum(*s) )
- {
- *d = tolower(*s);
- s++; d++;
- }
- if( *s == 0 ) break;
- /* trim excess whitespace */
- while( *s && !isalnum(*s) )
- {
- s++;
- }
- if( *s == 0 ) break;
- *d++ = ' ';
- }
- *d = 0;
- }
- static void strcpy_strip_ext( char *d, const char *s )
- {
- const char *tmp = strrchr(s, '.');
- if( !tmp )
- {
- strcpy(d, s);
- return;
- }
- else
- strlcpy(d, s, tmp - s + 1 );
- while( *d )
- {
- *d = tolower(*d);
- d++;
- }
- }
- static void strcpy_get_ext( char *d, const char *s )
- {
- const char *tmp = strrchr(s, '.');
- if( !tmp )
- strcpy(d, "");
- else
- strcpy( d, tmp + 1 );
- }
- static int whiteonly( const char *s )
- {
- while( *s )
- {
- if( isalnum( *s ) )
- return 0;
- s++;
- }
- return 1;
- }
- enum
- {
- SUB_PRIORITY_NONE = 0,
- SUB_PRIORITY_MATCH_NONE = 1,
- SUB_PRIORITY_MATCH_RIGHT = 2,
- SUB_PRIORITY_MATCH_LEFT = 3,
- SUB_PRIORITY_MATCH_ALL = 4,
- };
- typedef struct
- {
- int priority;
- char *psz_fname;
- char *psz_ext;
- } vlc_subfn_t;
- static int compare_sub_priority( const void *a, const void *b )
- {
- const vlc_subfn_t *p0 = a;
- const vlc_subfn_t *p1 = b;
- if( p0->priority > p1->priority )
- return -1;
- if( p0->priority < p1->priority )
- return 1;
- #ifndef UNDER_CE
- return strcoll( p0->psz_fname, p1->psz_fname);
- #else
- return strcmp( p0->psz_fname, p1->psz_fname);
- #endif
- }
- /*
- * Check if a file ends with a subtitle extension
- */
- int subtitles_Filter( const char *psz_dir_content )
- {
- const char *tmp = strrchr( psz_dir_content, '.');
- int i;
- if( !tmp )
- return 0;
- tmp++;
- for( i = 0; sub_exts[i][0]; i++ )
- if( strcasecmp( sub_exts[i], tmp ) == 0 )
- return 1;
- return 0;
- }
- /**
- * Convert a list of paths separated by ',' to a char**
- */
- static char **paths_to_list( const char *psz_dir, char *psz_path )
- {
- unsigned int i, k, i_nb_subdirs;
- char **subdirs; /* list of subdirectories to look in */
- char *psz_parser = psz_path;
- if( !psz_dir || !psz_path )
- return NULL;
- for( k = 0, i_nb_subdirs = 1; psz_path[k] != ' '; k++ )
- {
- if( psz_path[k] == ',' )
- i_nb_subdirs++;
- }
- subdirs = calloc( i_nb_subdirs + 1, sizeof(char*) );
- if( !subdirs )
- return NULL;
- for( i = 0; psz_parser && *psz_parser != ' ' ; )
- {
- char *psz_subdir = psz_parser;
- psz_parser = strchr( psz_subdir, ',' );
- if( psz_parser )
- {
- *psz_parser++ = ' ';
- while( *psz_parser == ' ' )
- psz_parser++;
- }
- if( *psz_subdir == ' ' )
- continue;
- if( asprintf( &subdirs[i++], "%s%s%c",
- psz_subdir[0] == '.' ? psz_dir : "",
- psz_subdir,
- psz_subdir[strlen(psz_subdir) - 1] == DIR_SEP_CHAR ?
- ' ' : DIR_SEP_CHAR ) == -1 )
- break;
- }
- subdirs[i] = NULL;
- return subdirs;
- }
- /**
- * Detect subtitle files.
- *
- * When called this function will split up the psz_name string into a
- * directory, filename and extension. It then opens the directory
- * in which the file resides and tries to find possible matches of
- * subtitles files.
- *
- * ingroup Demux
- * param p_this the calling ref input_thread_t
- * param psz_path a list of subdirectories (separated by a ',') to look in.
- * param psz_name the complete filename to base the search on.
- * return a NULL terminated array of filenames with detected possible subtitles.
- * The array contains max MAX_SUBTITLE_FILES items and you need to free it after use.
- */
- char **subtitles_Detect( input_thread_t *p_this, char *psz_path,
- const char *psz_name_org )
- {
- int i_fuzzy;
- int j, i_result2, i_sub_count, i_fname_len;
- char *f_dir = NULL, *f_fname = NULL, *f_fname_noext = NULL, *f_fname_trim = NULL;
- char *tmp = NULL;
- char **subdirs; /* list of subdirectories to look in */
- vlc_subfn_t *result = NULL; /* unsorted results */
- char **result2; /* sorted results */
- const char *psz_fname = psz_name_org;
- if( !psz_fname )
- return NULL;
- if( !strncmp( psz_fname, "file://", 7 ) )
- psz_fname += 7;
- /* extract filename & dirname from psz_fname */
- tmp = strrchr( psz_fname, DIR_SEP_CHAR );
- if( tmp )
- {
- const int i_dirlen = strlen(psz_fname)-strlen(tmp)+1; /* include the separator */
- f_fname = strdup( &tmp[1] ); /* skip the separator */
- f_dir = strndup( psz_fname, i_dirlen );
- }
- else
- {
- #if defined (HAVE_UNISTD_H) && !defined (UNDER_CE)
- /* Get the current working directory */
- char *psz_cwd = getcwd( NULL, 0 );
- #else
- char *psz_cwd = NULL;
- #endif
- if( !psz_cwd )
- return NULL;
- f_fname = strdup( psz_fname );
- if( asprintf( &f_dir, "%s%c", psz_cwd, DIR_SEP_CHAR ) == -1 )
- f_dir = NULL; /* Assure that function will return in next test */
- free( psz_cwd );
- }
- if( !f_fname || !f_dir )
- {
- free( f_fname );
- free( f_dir );
- return NULL;
- }
- i_fname_len = strlen( f_fname );
- f_fname_noext = malloc(i_fname_len + 1);
- f_fname_trim = malloc(i_fname_len + 1 );
- if( !f_fname_noext || !f_fname_trim )
- {
- free( f_fname );
- free( f_dir );
- free( f_fname_noext );
- free( f_fname_trim );
- return NULL;
- }
- strcpy_strip_ext( f_fname_noext, f_fname );
- strcpy_trim( f_fname_trim, f_fname_noext );
- i_fuzzy = var_GetInteger( p_this, "sub-autodetect-fuzzy" );
- result = calloc( MAX_SUBTITLE_FILES+1, sizeof(vlc_subfn_t) ); /* We check it later (simplify code) */
- subdirs = paths_to_list( f_dir, psz_path );
- for( j = -1, i_sub_count = 0; (j == -1) || ( j >= 0 && subdirs != NULL && subdirs[j] != NULL ); j++ )
- {
- const char *psz_dir = j < 0 ? f_dir : subdirs[j];
- char **ppsz_dir_content;
- int i_dir_content;
- int a;
- if( psz_dir == NULL || ( j >= 0 && !strcmp( psz_dir, f_dir ) ) )
- continue;
- /* parse psz_src dir */
- i_dir_content = utf8_scandir( psz_dir, &ppsz_dir_content,
- subtitles_Filter, NULL );
- if( i_dir_content < 0 )
- continue;
- msg_Dbg( p_this, "looking for a subtitle file in %s", psz_dir );
- for( a = 0; a < i_dir_content && i_sub_count < MAX_SUBTITLE_FILES ; a++ )
- {
- char *psz_name = ppsz_dir_content[a];
- char tmp_fname_noext[strlen( psz_name ) + 1];
- char tmp_fname_trim[strlen( psz_name ) + 1];
- char tmp_fname_ext[strlen( psz_name ) + 1];
- int i_prio;
- if( psz_name == NULL || psz_name[0] == '.' )
- continue;
- /* retrieve various parts of the filename */
- strcpy_strip_ext( tmp_fname_noext, psz_name );
- strcpy_get_ext( tmp_fname_ext, psz_name );
- strcpy_trim( tmp_fname_trim, tmp_fname_noext );
- i_prio = SUB_PRIORITY_NONE;
- if( i_prio == SUB_PRIORITY_NONE && !strcmp( tmp_fname_trim, f_fname_trim ) )
- {
- /* matches the movie name exactly */
- i_prio = SUB_PRIORITY_MATCH_ALL;
- }
- if( i_prio == SUB_PRIORITY_NONE &&
- ( tmp = strstr( tmp_fname_trim, f_fname_trim ) ) )
- {
- /* contains the movie name */
- tmp += strlen( f_fname_trim );
- if( whiteonly( tmp ) )
- {
- /* chars in front of the movie name */
- i_prio = SUB_PRIORITY_MATCH_RIGHT;
- }
- else
- {
- /* chars after (and possibly in front of)
- * the movie name */
- i_prio = SUB_PRIORITY_MATCH_LEFT;
- }
- }
- if( i_prio == SUB_PRIORITY_NONE &&
- j == 0 )
- {
- /* doesn't contain the movie name, prefer files in f_dir over subdirs */
- i_prio = SUB_PRIORITY_MATCH_NONE;
- }
- if( i_prio >= i_fuzzy )
- {
- char psz_path[strlen( psz_dir ) + strlen( psz_name ) + 1];
- struct stat st;
- sprintf( psz_path, "%s%s", psz_dir, psz_name );
- if( !strcmp( psz_path, psz_fname ) )
- continue;
- if( !utf8_stat( psz_path, &st ) && S_ISREG( st.st_mode ) && result )
- {
- msg_Dbg( p_this,
- "autodetected subtitle: %s with priority %d",
- psz_path, i_prio );
- result[i_sub_count].priority = i_prio;
- result[i_sub_count].psz_fname = strdup( psz_path );
- result[i_sub_count].psz_ext = strdup(tmp_fname_ext);
- i_sub_count++;
- }
- else
- {
- msg_Dbg( p_this, "stat failed (autodetecting subtitle: %s with priority %d)",
- psz_path, i_prio );
- }
- }
- }
- if( ppsz_dir_content )
- {
- for( a = 0; a < i_dir_content; a++ )
- free( ppsz_dir_content[a] );
- free( ppsz_dir_content );
- }
- }
- if( subdirs )
- {
- for( j = 0; subdirs[j]; j++ )
- free( subdirs[j] );
- free( subdirs );
- }
- free( f_fname );
- free( f_dir );
- free( f_fname_trim );
- free( f_fname_noext );
- if( !result )
- return NULL;
- qsort( result, i_sub_count, sizeof(vlc_subfn_t), compare_sub_priority );
- result2 = calloc( i_sub_count + 1, sizeof(char*) );
- for( j = 0, i_result2 = 0; j < i_sub_count && result2 != NULL; j++ )
- {
- bool b_reject = false;
- if( !result[j].psz_fname || !result[j].psz_ext ) /* memory out */
- break;
- if( !strcasecmp( result[j].psz_ext, "sub" ) )
- {
- int i;
- for( i = 0; i < i_sub_count; i++ )
- {
- if( result[i].psz_fname && result[i].psz_ext &&
- !strncasecmp( result[j].psz_fname, result[i].psz_fname,
- strlen( result[j].psz_fname) - 3 ) &&
- !strcasecmp( result[i].psz_ext, "idx" ) )
- break;
- }
- if( i < i_sub_count )
- b_reject = true;
- }
- else if( !strcasecmp( result[j].psz_ext, "cdg" ) )
- {
- if( result[j].priority < SUB_PRIORITY_MATCH_ALL )
- b_reject = true;
- }
- /* */
- if( !b_reject )
- result2[i_result2++] = strdup( result[j].psz_fname );
- }
- for( j = 0; j < i_sub_count; j++ )
- {
- free( result[j].psz_fname );
- free( result[j].psz_ext );
- }
- free( result );
- return result2;
- }