path: root/subreader.c

/*
 * Subtitle reader with format autodetection
 *
 * Written by laaz
 * Some code cleanup & realloc() by A'rpi/ESP-team
 * dunnowhat sub format by szabi
 */


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include "config.h"
#include "subreader.h"

#define ERR ((void *) -1)

#ifdef USE_ICONV
#ifdef __FreeBSD__
#include <giconv.h>
#else
#include <iconv.h>
#endif
char *sub_cp=NULL;
#endif

/* Maximal length of line of a subtitle */
#define LINE_LEN 1000

static float mpsub_position=0;

int sub_uses_time=0;
int sub_errs=0;
int sub_num=0;          // number of subtitle structs
int sub_slacktime=2000; // 20 seconds

/* Use the SUB_* constant defined in the header file */
int sub_format=SUB_INVALID;

static int eol(char p) {
    return (p=='\r' || p=='\n' || p=='\0');
}

/* Remove leading and trailing space */
static void trail_space(char *s) {
	int i = 0;
	while (isspace(s[i])) ++i;
	if (i) strcpy(s, s + i);
	i = strlen(s) - 1;
	while (i > 0 && isspace(s[i])) s[i--] = '\0';
}


subtitle *sub_read_line_sami(FILE *fd, subtitle *current) {
    static char line[LINE_LEN+1];
    static char *s = NULL, *slacktime_s;
    char text[LINE_LEN+1], *p, *q;
    int state;

    current->lines = current->start = current->end = 0;
    state = 0;

    /* read the first line */
    if (!s)
	    if (!(s = fgets(line, LINE_LEN, fd))) return 0;

    do {
	switch (state) {

	case 0: /* find "START=" or "Slacktime:" */
	    slacktime_s = strstr (s, "Slacktime:");
	    if (slacktime_s) sub_slacktime = strtol (slacktime_s + 10, NULL, 0) / 10;

	    s = strstr (s, "Start=");
	    if (s) {
		current->start = strtol (s + 6, &s, 0) / 10;
		state = 1; continue;
	    }
	    break;
 
	case 1: /* find "<P" */
	    if ((s = strstr (s, "<P"))) { s += 2; state = 2; continue; }
	    break;
 
	case 2: /* find ">" */
	    if ((s = strchr (s, '>'))) { s++; state = 3; p = text; continue; }
	    break;
 
	case 3: /* get all text until '<' appears */
	    if (*s == '\0') break;
	    else if (!strncasecmp (s, "<br>", 4)) {
		*p = '\0'; p = text; trail_space (text);
		if (text[0] != '\0')
		    current->text[current->lines++] = strdup (text);
		s += 4;
	    }
	    else if (*s == '<') { state = 4; }
	    else if (!strncasecmp (s, "&nbsp;", 6)) { *p++ = ' '; s += 6; }
	    else if (*s == '\t') { *p++ = ' '; s++; }
	    else if (*s == '\r' || *s == '\n') { s++; }
	    else *p++ = *s++;

	    /* skip duplicated space */
	    if (p > text + 2) if (*(p-1) == ' ' && *(p-2) == ' ') p--;
	    
	    continue;

	case 4: /* get current->end or skip <TAG> */
	    q = strstr (s, "Start=");
	    if (q) {
		current->end = strtol (q + 6, &q, 0) / 10 - 1;
		*p = '\0'; trail_space (text);
		if (text[0] != '\0')
		    current->text[current->lines++] = strdup (text);
		if (current->lines > 0) { state = 99; break; }
		state = 0; continue;
	    }
	    s = strchr (s, '>');
	    if (s) { s++; state = 3; continue; }
	    break;
	}

	/* read next line */
	if (state != 99 && !(s = fgets (line, LINE_LEN, fd))) {
	    if (current->start > 0) {
		break; // if it is the last subtitle
	    } else {
		return 0;
	    }
	}
	    
    } while (state != 99);

    // For the last subtitle
    if (current->end <= 0) {
        current->end = current->start + sub_slacktime;
	*p = '\0'; trail_space (text);
	if (text[0] != '\0')
	    current->text[current->lines++] = strdup (text);
    }
    
    return current;
}


char *sub_readtext(char *source, char **dest) {
    int len=0;
    char *p=source;
    
    while ( !eol(*p) && *p!= '|' ) {
	p++,len++;
    }
    
    *dest= (char *)malloc (len+1);
    if (!dest) {return ERR;}
    
    strncpy(*dest, source, len);
    (*dest)[len]=0;
    
    while (*p=='\r' || *p=='\n' || *p=='|') p++;
    
    if (*p) return p;  // not-last text field
    else return NULL;  // last text field
}

subtitle *sub_read_line_microdvd(FILE *fd,subtitle *current) {
    char line[LINE_LEN+1];
    char line2[LINE_LEN+1];
    char *p, *next;
    int i;

    do {
	if (!fgets (line, LINE_LEN, fd)) return NULL;
    } while ((sscanf (line,
		      "{%ld}{}%[^\r\n]",
		      &(current->start), line2) < 2) &&
	     (sscanf (line,
		      "{%ld}{%ld}%[^\r\n]",
		      &(current->start), &(current->end), line2) < 3));
	
    p=line2;

    next=p, i=0;
    while ((next =sub_readtext (next, &(current->text[i])))) {
        if (current->text[i]==ERR) {return ERR;}
	i++;
	if (i>=SUB_MAX_TEXT) { printf ("Too many lines in a subtitle\n");current->lines=i;return current;}
    }
    current->lines= ++i;

    return current;
}

subtitle *sub_read_line_subrip(FILE *fd, subtitle *current) {
    char line[LINE_LEN+1];
    int a1,a2,a3,a4,b1,b2,b3,b4;
    char *p=NULL, *q=NULL;
    int len;
    
    while (1) {
	if (!fgets (line, LINE_LEN, fd)) return NULL;
	if (sscanf (line, "%d:%d:%d.%d,%d:%d:%d.%d",&a1,&a2,&a3,&a4,&b1,&b2,&b3,&b4) < 8) continue;
	current->start = a1*360000+a2*6000+a3*100+a4;
	current->end   = b1*360000+b2*6000+b3*100+b4;

	if (!fgets (line, LINE_LEN, fd)) return NULL;

	p=q=line;
	for (current->lines=1; current->lines < SUB_MAX_TEXT; current->lines++) {
	    for (q=p,len=0; *p && *p!='\r' && *p!='\n' && strncmp(p,"[br]",4); p++,len++);
	    current->text[current->lines-1]=(char *)malloc (len+1);
	    if (!current->text[current->lines-1]) return ERR;
	    strncpy (current->text[current->lines-1], q, len);
	    current->text[current->lines-1][len]='\0';
	    if (!*p || *p=='\r' || *p=='\n') break;
	    while (*p++!=']');
	}
	break;
    }
    return current;
}

subtitle *sub_read_line_subviewer(FILE *fd,subtitle *current) {
    char line[LINE_LEN+1];
    int a1,a2,a3,a4,b1,b2,b3,b4;
    char *p=NULL;
    int i,len;
    
    while (!current->text[0]) {
	if (!fgets (line, LINE_LEN, fd)) return NULL;
	if ((len=sscanf (line, "%d:%d:%d,%d --> %d:%d:%d,%d",&a1,&a2,&a3,&a4,&b1,&b2,&b3,&b4)) < 8)
	    continue;
	current->start = a1*360000+a2*6000+a3*100+a4/10;
	current->end   = b1*360000+b2*6000+b3*100+b4/10;
	for (i=0; i<SUB_MAX_TEXT;) {
	    if (!fgets (line, LINE_LEN, fd)) break;
	    len=0;
	    for (p=line; *p!='\n' && *p!='\r' && *p; p++,len++);
	    if (len) {
		current->text[i]=(char *)malloc (len+1);
		if (!current->text[i]) return ERR;
		strncpy (current->text[i], line, len); current->text[i][len]='\0';
		i++;
	    } else {
		break;
	    }
	}
	current->lines=i;
    }
    return current;
}

subtitle *sub_read_line_vplayer(FILE *fd,subtitle *current) {
	char line[LINE_LEN+1];
	int a1,a2,a3;
	char *p=NULL, *next,separator;
	int i,len,plen;

	while (!current->text[0]) {
		if (!fgets (line, LINE_LEN, fd)) return NULL;
		if ((len=sscanf (line, "%d:%d:%d%c%n",&a1,&a2,&a3,&separator,&plen)) < 4)
			continue;
		
		if (!(current->start = a1*360000+a2*6000+a3*100))
			continue;
                /* removed by wodzu
		p=line;	
 		// finds the body of the subtitle
 		for (i=0; i<3; i++){              
		   p=strchr(p,':');
		   if (p==NULL) break;
		   ++p;
		} 
		if (p==NULL) {
		    printf("SUB: Skipping incorrect subtitle line!\n");
		    continue;
		}
                */
                // by wodzu: hey! this time we know what length it has! what is
                // that magic for? it can't deal with space instead of third
                // colon! look, what simple it can be:
                p = &line[ plen ];

 		i=0;
		if (*p!='|') {
			//
			next = p,i=0;
			while ((next =sub_readtext (next, &(current->text[i])))) {
				if (current->text[i]==ERR) {return ERR;}
				i++;
				if (i>=SUB_MAX_TEXT) { printf ("Too many lines in a subtitle\n");current->lines=i;return current;}
			}
			current->lines=i+1;
		}
	}
	return current;
}

subtitle *sub_read_line_rt(FILE *fd,subtitle *current) {
	//TODO: This format uses quite rich (sub/super)set of xhtml 
	// I couldn't check it since DTD is not included.
	// WARNING: full XML parses can be required for proper parsing 
    char line[LINE_LEN+1];
    int a1,a2,a3,a4,b1,b2,b3,b4;
    char *p=NULL,*next=NULL;
    int i,len,plen;
    
    while (!current->text[0]) {
	if (!fgets (line, LINE_LEN, fd)) return NULL;
	//TODO: it seems that format of time is not easily determined, it may be 1:12, 1:12.0 or 0:1:12.0
	//to describe the same moment in time. Maybe there are even more formats in use.
	//if ((len=sscanf (line, "<Time Begin=\"%d:%d:%d.%d\" End=\"%d:%d:%d.%d\"",&a1,&a2,&a3,&a4,&b1,&b2,&b3,&b4)) < 8)
	plen=a1=a2=a3=a4=b1=b2=b3=b4=0;
	if (
	((len=sscanf (line, "<%*[tT]ime %*[bB]egin=\"%d:%d\" %*[Ee]nd=\"%d:%d\"%*[^<]<clear/>%n",&a2,&a3,&b2,&b3,&plen)) < 4) &&
	((len=sscanf (line, "<%*[tT]ime %*[bB]egin=\"%d:%d\" %*[Ee]nd=\"%d:%d.%d\"%*[^<]<clear/>%n",&a2,&a3,&b2,&b3,&b4,&plen)) < 5) &&
//	((len=sscanf (line, "<%*[tT]ime %*[bB]egin=\"%d:%d.%d\" %*[Ee]nd=\"%d:%d\"%*[^<]<clear/>%n",&a2,&a3,&a4,&b2,&b3,&plen)) < 5) &&
	((len=sscanf (line, "<%*[tT]ime %*[bB]egin=\"%d:%d.%d\" %*[Ee]nd=\"%d:%d.%d\"%*[^<]<clear/>%n",&a2,&a3,&a4,&b2,&b3,&b4,&plen)) < 6) &&
	((len=sscanf (line, "<%*[tT]ime %*[bB]egin=\"%d:%d:%d.%d\" %*[Ee]nd=\"%d:%d:%d.%d\"%*[^<]<clear/>%n",&a1,&a2,&a3,&a4,&b1,&b2,&b3,&b4,&plen)) < 8) 
	)
	    continue;
	current->start = a1*360000+a2*6000+a3*100+a4/10;
	current->end   = b1*360000+b2*6000+b3*100+b4/10;
	p=line;	p+=plen;i=0;
	// TODO: I don't know what kind of convention is here for marking multiline subs, maybe <br/> like in xml?
	next = strstr(line,"<clear/>")+8;i=0;
	while ((next =sub_readtext (next, &(current->text[i])))) {
		if (current->text[i]==ERR) {return ERR;}
		i++;
		if (i>=SUB_MAX_TEXT) { printf ("Too many lines in a subtitle\n");current->lines=i;return current;}
	}
			current->lines=i+1;
    }
    return current;
}

subtitle *sub_read_line_ssa(FILE *fd,subtitle *current) {
	int hour1, min1, sec1, hunsec1,
	    hour2, min2, sec2, hunsec2, nothing;
	int num;
	
	char line[LINE_LEN+1],
	     line3[LINE_LEN+1],
	     *line2;
	char *tmp;

	do {
		if (!fgets (line, LINE_LEN, fd)) return NULL;
	} while (sscanf (line, "Dialogue: Marked=%d,%d:%d:%d.%d,%d:%d:%d.%d,"
			"%[^\n\r]", &nothing,
			&hour1, &min1, &sec1, &hunsec1, 
			&hour2, &min2, &sec2, &hunsec2,
			line3) < 9);
	line2=strstr(line3,",,");
	if (!line2) return NULL;
	line2 ++;
	line2 ++;

	current->lines=1;num=0;
	current->start = 360000*hour1 + 6000*min1 + 100*sec1 + hunsec1;
	current->end   = 360000*hour2 + 6000*min2 + 100*sec2 + hunsec2;
	
        while (((tmp=strstr(line2, "\\n")) != NULL) || ((tmp=strstr(line2, "\\N")) != NULL) ){
		current->text[num]=(char *)malloc(tmp-line2+1);
		strncpy (current->text[num], line2, tmp-line2);
		current->text[num][tmp-line2]='\0';
		line2=tmp+2;
		num++;
		current->lines++;
		if (current->lines >=  SUB_MAX_TEXT) return current;
	}


	current->text[num]=strdup(line2);

	return current;
}

subtitle *sub_read_line_dunnowhat(FILE *fd,subtitle *current) {
    char line[LINE_LEN+1];
    char text[LINE_LEN+1];

    if (!fgets (line, LINE_LEN, fd))
	return NULL;
    if (sscanf (line, "%ld,%ld,\"%[^\"]", &(current->start),
		&(current->end), text) <3)
	return ERR;
    current->text[0] = strdup(text);
    current->lines = 1;

    return current;
}

subtitle *sub_read_line_mpsub(FILE *fd, subtitle *current) {
	char line[LINE_LEN+1];
	float a,b;
	int num=0;
	char *p, *q;

	do
	{
		if (!fgets(line, LINE_LEN, fd)) return NULL;
	} while (sscanf (line, "%f %f", &a, &b) !=2);

	mpsub_position += a*(sub_uses_time ? 100.0 : 1.0);
	current->start=(int) mpsub_position;
	mpsub_position += b*(sub_uses_time ? 100.0 : 1.0);
	current->end=(int) mpsub_position;

	while (num < SUB_MAX_TEXT) {
		if (!fgets (line, LINE_LEN, fd)) {
			if (num == 0) return NULL;
			else return current;
		}
		p=line;
		while (isspace(*p)) p++;
		if (eol(*p) && num > 0) return current;
		if (eol(*p)) return NULL;

		for (q=p; !eol(*q); q++);
		*q='\0';
		if (strlen(p)) {
			current->text[num]=strdup(p);
//			printf (">%s<\n",p);
			current->lines = ++num;
		} else {
			if (num) return current;
			else return NULL;
		}
	}
	return NULL; // we should have returned before if it's OK
}

subtitle *previous_aqt_sub = NULL;

subtitle *sub_read_line_aqt(FILE *fd,subtitle *current) {
    char line[LINE_LEN+1];

    while (1) {
    // try to locate next subtitle
        if (!fgets (line, LINE_LEN, fd))
		return NULL;
        if (!(sscanf (line, "-->> %ld", &(current->start)) <1))
		break;
    }
    
    if (previous_aqt_sub != NULL) 
	previous_aqt_sub->end = current->start-1;
    
    previous_aqt_sub = current;

    if (!fgets (line, LINE_LEN, fd))
	return NULL;

    sub_readtext((char *) &line,&current->text[0]);
    current->lines = 1;
    current->end = current->start; // will be corrected by next subtitle

    if (!fgets (line, LINE_LEN, fd))
	return current;;

    sub_readtext((char *) &line,&current->text[1]);
    current->lines = 2;

    if ((current->text[0]=="") && (current->text[1]=="")) {
	// void subtitle -> end of previous marked and exit
	previous_aqt_sub = NULL;
	return NULL;
	}

    return current;
}

int sub_autodetect (FILE *fd) {
    char line[LINE_LEN+1];
    int i,j=0;
    char p;
    
    while (j < 100) {
	j++;
	if (!fgets (line, LINE_LEN, fd))
	    return SUB_INVALID;

	if (sscanf (line, "{%d}{%d}", &i, &i)==2)
		{sub_uses_time=0;return SUB_MICRODVD;}
	if (sscanf (line, "{%d}{}", &i)==1)
		{sub_uses_time=0;return SUB_MICRODVD;}
	if (sscanf (line, "%d:%d:%d.%d,%d:%d:%d.%d",     &i, &i, &i, &i, &i, &i, &i, &i)==8)
		{sub_uses_time=1;return SUB_SUBRIP;}
	if (sscanf (line, "%d:%d:%d,%d --> %d:%d:%d,%d", &i, &i, &i, &i, &i, &i, &i, &i)==8)
		{sub_uses_time=1;return SUB_SUBVIEWER;}
	if (strstr (line, "<SAMI>"))
		{sub_uses_time=1; return SUB_SAMI;}
	if (sscanf (line, "%d:%d:%d:",     &i, &i, &i )==3)
		{sub_uses_time=1;return SUB_VPLAYER;}
	if (sscanf (line, "%d:%d:%d ",     &i, &i, &i )==3)
		{sub_uses_time=1;return SUB_VPLAYER;}
	//TODO: just checking if first line of sub starts with "<" is WAY
	// too weak test for RT
	// Please someone who knows the format of RT... FIX IT!!!
	// It may conflict with other sub formats in the future (actually it doesn't)
	if ( *line == '<' )
		{sub_uses_time=1;return SUB_RT;}

	if (!memcmp(line, "Dialogue: Marked", 16))
		{sub_uses_time=1; return SUB_SSA;}
	if (sscanf (line, "%d,%d,\"%c", &i, &i, (char *) &i) == 3)
		{sub_uses_time=0;return SUB_DUNNOWHAT;}
	if (sscanf (line, "FORMAT=%d", &i) == 1)
		{sub_uses_time=0; return SUB_MPSUB;}
	if (sscanf (line, "FORMAT=TIM%c", &p)==1 && p=='E')
		{sub_uses_time=1; return SUB_MPSUB;}
	if (strstr (line, "-->>"))
		{sub_uses_time=0; return SUB_MPSUB;}
    }

    return SUB_INVALID;  // too many bad lines
}

#ifdef DUMPSUBS
int sub_utf8=0;
#else
extern int sub_utf8;
#endif

extern float sub_delay;
extern float sub_fps;

#ifdef USE_ICONV
static iconv_t icdsc;

void	subcp_open (void)
{
	char *tocp = "UTF-8";
	icdsc = (iconv_t)(-1);
	if (sub_cp){
		if ((icdsc = iconv_open (tocp, sub_cp)) != (iconv_t)(-1)){
			printf ("SUB: opened iconv descriptor.\n");
			sub_utf8 = 2;
		} else
			printf ("SUB: error opening iconv descriptor.\n");
	}
}

void	subcp_close (void)
{
	if (icdsc != (iconv_t)(-1)){
		(void) iconv_close (icdsc);
	   	printf ("SUB: closed iconv descriptor.\n");
	}
}

#define ICBUFFSIZE 512
static char icbuffer[ICBUFFSIZE];

subtitle* subcp_recode (subtitle *sub)
{
	int l=sub->lines;
	size_t ileft, oleft, otlen;
	char *op, *ip, *ot;

	while (l){
		op = icbuffer;
		ip = sub->text[--l];
		ileft = strlen(ip);
		oleft = ICBUFFSIZE - 1;
		
		if (iconv(icdsc, (const char **) &ip, &ileft,
			  &op, &oleft) == (size_t)(-1)) {
			printf ("SUB: error recoding line.\n");
			l++;
			break;
		}
		if (!(ot = (char *)malloc(op - icbuffer + 1))){
			printf ("SUB: error allocating mem.\n");
			l++;
		   	break;
		}
		*op='\0' ;
		strcpy (ot, icbuffer);
		free (sub->text[l]);
		sub->text[l] = ot;
	}
	if (l){
		for (l = sub->lines; l;)
			free (sub->text[--l]);
		return ERR;
	}
	return sub;
}

#endif

static void adjust_subs_time(subtitle* sub, float subtime, float fps){
	int n,m;
	subtitle* nextsub;
	int i = sub_num;
	unsigned long subfms = (sub_uses_time ? 100 : fps) * subtime;
	
	n=m=0;
	if (i)	for (;;){	
		if (sub->end <= sub->start){
			sub->end = sub->start + subfms;
			m++;
			n++;
		}
		if (!--i) break;
		nextsub = sub + 1;
		if (sub->end >= nextsub->start){
			sub->end = nextsub->start - 1;
			if (sub->end - sub->start > subfms)
				sub->end = sub->start + subfms;
			if (!m)
				n++;
		}
		sub = nextsub;
		m = 0;
	}
	if (n) printf ("SUB: Adjusted %d subtitle(s).\n", n);
}

subtitle* sub_read_file (char *filename, float fps) {
    FILE *fd;
    int n_max;
    subtitle *first;
    char *fmtname[] = { "microdvd", "subrip", "subviewer", "sami", "vplayer",
		        "rt", "ssa", "dunnowhat", "mpsub", "aqt" };
    subtitle * (*func[])(FILE *fd,subtitle *dest)=
    {
	    sub_read_line_microdvd,
	    sub_read_line_subrip,
	    sub_read_line_subviewer,
	    sub_read_line_sami,
	    sub_read_line_vplayer,
	    sub_read_line_rt,
	    sub_read_line_ssa,
	    sub_read_line_dunnowhat,
	    sub_read_line_mpsub,
	    sub_read_line_aqt

    };
    if(filename==NULL) return NULL; //qnx segfault
    fd=fopen (filename, "r"); if (!fd) return NULL;

    sub_format=sub_autodetect (fd);
    if (sub_format==SUB_INVALID) {printf ("SUB: Could not determine file format\n");return NULL;}
    printf ("SUB: Detected subtitle file format: %s\n", fmtname[sub_format]);
    
    rewind (fd);

#ifdef USE_ICONV
    subcp_open();
#endif

    sub_num=0;n_max=32;
    first=(subtitle *)malloc(n_max*sizeof(subtitle));
    if(!first) return NULL;
    
    while(1){
        subtitle *sub;
        if(sub_num>=n_max){
            n_max+=16;
            first=realloc(first,n_max*sizeof(subtitle));
        }
	sub = &first[sub_num];
	memset(sub, '\0', sizeof(subtitle));
        sub=func[sub_format](fd,sub);
        if(!sub) break;   // EOF
#ifdef USE_ICONV
	if ((sub!=ERR) && (sub_utf8 & 2)) sub=subcp_recode(sub);
#endif
        if(sub==ERR) ++sub_errs; else ++sub_num; // Error vs. Valid
    }
    
    fclose(fd);

#ifdef USE_ICONV
    subcp_close();
#endif

//    printf ("SUB: Subtitle format %s time.\n", sub_uses_time?"uses":"doesn't use");
    printf ("SUB: Read %i subtitles", sub_num);
    if (sub_errs) printf (", %i bad line(s).\n", sub_errs);
    else 	  printf (".\n");

    if(sub_num<=0){
	free(first);
	return NULL;
    }

    adjust_subs_time(first, 6.0, fps); /* ~6 secs AST */
    return first;
}

#if 0
char * strreplace( char * in,char * what,char * whereof )
{
 int i;
 char * tmp;
 
 if ( ( in == NULL )||( what == NULL )||( whereof == NULL )||( ( tmp=strstr( in,what ) ) == NULL ) ) return NULL;
 for( i=0;i<strlen( whereof );i++ ) tmp[i]=whereof[i];
 if ( strlen( what ) > strlen( whereof ) ) tmp[i]=0;
 return in;
}
#endif

char * sub_filename(char* path,  char * fname )
{
 char * sub_name1;
 char * sub_name2;
 char * aviptr1, * aviptr2, * tmp;
 int    i,j;
 FILE * f;
 int pos=0;
 char * sub_exts[] = 
  { ".utf",
    ".UTF",
    ".sub",
    ".SUB",
    ".srt",
    ".SRT",
    ".smi",
    ".SMI",
    ".rt",
    ".RT",
    ".txt",
    ".TXT",
    ".ssa",
    ".SSA",
    ".aqt",
    ".AQT"};


 if ( fname == NULL ) return NULL;
 
 sub_name1=strrchr(fname,'.');
 if (!sub_name1) return NULL;
 pos=sub_name1-fname;
 
 sub_name1=malloc(strlen(fname)+8);
 strcpy(sub_name1,fname);

 sub_name2=malloc (strlen(path) + strlen(fname) + 8);
 if ((tmp=strrchr(fname,'/')))
	 sprintf (sub_name2, "%s%s", path, tmp+1);
 else
	 sprintf (sub_name2, "%s%s", path, fname);
 
 aviptr1=strrchr(sub_name1,'.');
 aviptr2=strrchr(sub_name2,'.');
 
 for(j=0;j<=1;j++){
  char* sub_name=j?sub_name1:sub_name2;
#ifdef USE_ICONV
  for ( i=(sub_cp?2:0);i<(sizeof(sub_exts)/sizeof(char*));i++ ) {
#else
  for ( i=0;i<(sizeof(sub_exts)/sizeof(char*));i++ ) {
#endif	  
   strcpy(j?aviptr1:aviptr2,sub_exts[i]);
//   printf("trying: '%s'\n",sub_name);
   if((f=fopen( sub_name,"rt" ))) {
     fclose( f );
     printf( "SUB: Detected sub file: %s\n",sub_name );
     if (i<2) sub_utf8=1;
     return sub_name;
   }
  }
 }
 
 return NULL;
}

void list_sub_file(subtitle* subs){
    int i,j;

    for(j=0;j<sub_num;j++){
	subtitle* egysub=&subs[j];
        printf ("%i line%c (%li-%li) ",
		    egysub->lines,
		    (1==egysub->lines)?' ':'s',
		    egysub->start,
		    egysub->end);
	for (i=0; i<egysub->lines; i++) {
	    printf ("%s%s",egysub->text[i], i==egysub->lines-1?"":" <BREAK> ");
	}
	printf ("\n");
    }

    printf ("Subtitle format %s time.\n", sub_uses_time?"uses":"doesn't use");
    printf ("Read %i subtitles, %i errors.\n", sub_num, sub_errs);

}

void dump_mpsub(subtitle* subs, float fps){
	int i,j;
	FILE *fd;
	float a,b;

	mpsub_position=sub_uses_time?(sub_delay*100):(sub_delay*fps);
	if (sub_fps==0) sub_fps=fps;

	fd=fopen ("dump.mpsub", "w");
	if (!fd) {
		perror ("dump_mpsub: fopen");
		return;
	}
	

	if (sub_uses_time) fprintf (fd,"FORMAT=TIME\n\n");
	else fprintf (fd, "FORMAT=%5.2f\n\n", fps);

	for(j=0;j<sub_num;j++){
		subtitle* egysub=&subs[j];
		if (sub_uses_time) {
			a=((egysub->start-mpsub_position)/100.0);
			b=((egysub->end-egysub->start)/100.0);
			if ( (float)((int)a) == a)
			fprintf (fd, "%.0f",a);
			else
			fprintf (fd, "%.2f",a);
			    
			if ( (float)((int)b) == b)
			fprintf (fd, " %.0f\n",b);
			else
			fprintf (fd, " %.2f\n",b);
		} else {
			fprintf (fd, "%ld %ld\n", (long)((egysub->start*(fps/sub_fps))-((mpsub_position*(fps/sub_fps)))),
					(long)(((egysub->end)-(egysub->start))*(fps/sub_fps)));
		}

		mpsub_position = egysub->end;
		for (i=0; i<egysub->lines; i++) {
			fprintf (fd, "%s\n",egysub->text[i]);
		}
		fprintf (fd, "\n");
	}
	fclose (fd);
	printf ("SUB: Subtitles dumped in \'dump.mpsub\'.\n");
}

void sub_free( subtitle * subs )
{
 int i;
 
 if ( !subs ) return;
 
 sub_num=0;
 sub_errs=0;
 for ( i=0;i<subs->lines;i++ ) free( subs->text[i] );
 free( subs );
 subs=NULL;
}

#ifdef DUMPSUBS
int main(int argc, char **argv) {  // for testing

    int i,j;
    subtitle *subs;
    subtitle *egysub;
    
    if(argc<2){
        printf("\nUsage: subreader filename.sub\n\n");
        exit(1);
    }
    sub_cp = argv[2]; 
    subs=sub_read_file(argv[1]);
    if(!subs){
        printf("Couldn't load file.\n");
        exit(1);
    }
    
    list_sub_file(subs);

    return 0;
}
#endif