mirror of https://github.com/mpv-player/mpv
466 lines
12 KiB
C
466 lines
12 KiB
C
/*
|
||
* Subtitle reader with format autodetection
|
||
*
|
||
* Written by laaz
|
||
* Some code cleanup & realloc() by A'rpi/ESP-team
|
||
*/
|
||
|
||
|
||
#include <stdio.h>
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
#include <ctype.h>
|
||
|
||
#include "subreader.h"
|
||
|
||
#define ERR (void *)-1
|
||
|
||
|
||
int sub_uses_time=0;
|
||
int sub_errs=0;
|
||
int sub_num=0; // number of subtitle structs
|
||
int sub_format=-1; // 0 for microdvd
|
||
// 1 for SubRip
|
||
// 2 for the third format (what's this?)
|
||
// 3 for SAMI (smi)
|
||
// 4 for vplayer format
|
||
// 5 for RT format
|
||
|
||
int eol(char p) {
|
||
return (p=='\r' || p=='\n' || p=='\0');
|
||
}
|
||
|
||
static inline void trail_space(char *s) {
|
||
int i;
|
||
while (isspace(*s)) strcpy(s, s + 1);
|
||
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[1001];
|
||
static char *s = NULL;
|
||
char text[1000], *p, *q;
|
||
int state;
|
||
|
||
current->lines = current->start = current->end = 0;
|
||
state = 0;
|
||
|
||
/* read the first line */
|
||
if (!s)
|
||
if (!(s = fgets(line, 1000, fd))) return 0;
|
||
|
||
do {
|
||
switch (state) {
|
||
|
||
case 0: /* find "START=" */
|
||
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 (*s == '<') { state = 4; }
|
||
else if (!strncasecmp (s, " ", 6)) { *p++ = ' '; s += 6; }
|
||
else if (*s == '\r') { s++; }
|
||
else if (!strncasecmp (s, "<br>", 4) || *s == '\n') {
|
||
*p = '\0'; p = text; trail_space (text);
|
||
if (text[0] != '\0')
|
||
current->text[current->lines++] = strdup (text);
|
||
if (*s == '\n') s++; else s += 4;
|
||
}
|
||
else *p++ = *s++;
|
||
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, 1000, fd))) return 0;
|
||
|
||
} while (state != 99);
|
||
|
||
return current;
|
||
}
|
||
|
||
|
||
char *sub_readtext(char *source, char **dest) {
|
||
int len=0;
|
||
char *p;
|
||
|
||
for (p=source;*p!='\r' && *p!='\n' && *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[1001];
|
||
char line2[1001];
|
||
char *p, *next;
|
||
int i;
|
||
|
||
bzero (current, sizeof(current));
|
||
|
||
do {
|
||
if (!fgets (line, 1000, fd)) return NULL;
|
||
} while (*line=='\n' || *line == '\r' || !*line);
|
||
|
||
if (sscanf (line, "{%ld}{%ld}%s", &(current->start), &(current->end),line2) <2) {return ERR;}
|
||
|
||
p=line;
|
||
while (*p++!='}');
|
||
while (*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->lines=i+1;
|
||
|
||
return current;
|
||
}
|
||
|
||
subtitle *sub_read_line_subrip(FILE *fd, subtitle *current) {
|
||
char line[1001];
|
||
int a1,a2,a3,a4,b1,b2,b3,b4;
|
||
char *p=NULL, *q=NULL;
|
||
int len;
|
||
|
||
bzero (current, sizeof(current));
|
||
|
||
while (!current->text[0]) {
|
||
if (!fgets (line, 1000, 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, 1000, 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++!=']');
|
||
}
|
||
}
|
||
return current;
|
||
}
|
||
|
||
subtitle *sub_read_line_third(FILE *fd,subtitle *current) {
|
||
char line[1001];
|
||
int a1,a2,a3,a4,b1,b2,b3,b4;
|
||
char *p=NULL;
|
||
int i,len;
|
||
|
||
bzero (current, sizeof(current));
|
||
|
||
while (!current->text[0]) {
|
||
if (!fgets (line, 1000, 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, 1000, 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[1001];
|
||
char line2[1001];
|
||
int a1,a2,a3,b1,b2,b3;
|
||
int setime,etime;
|
||
char *p=NULL, *q=NULL, *l=NULL,*next;
|
||
int i,len,len2,plen;
|
||
|
||
bzero (current, sizeof(current));
|
||
|
||
while (!current->text[0]) {
|
||
if (!fgets (line, 1000, fd)) return NULL;
|
||
if ((len=sscanf (line, "%d:%d:%d:%n",&a1,&a2,&a3,&plen)) < 3)
|
||
continue;
|
||
if (!fgets (line2, 1000, fd)) return NULL;
|
||
if ((len2=sscanf (line2, "%d:%d:%d:",&b1,&b2,&b3)) < 3)
|
||
continue;
|
||
// przewi<77> o linijk<6A> do ty<74>u:
|
||
fseek(fd,-strlen(line2),SEEK_CUR);
|
||
|
||
current->start = a1*360000+a2*6000+a3*100;
|
||
current->end = b1*360000+b2*6000+b3*100;
|
||
// teraz czas na wkopiowanie stringu
|
||
p=line; p+=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->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[1001];
|
||
int a1,a2,a3,a4,b1,b2,b3,b4;
|
||
char *p=NULL,*next=NULL;
|
||
int i,len,plen;
|
||
|
||
bzero (current, sizeof(current));
|
||
|
||
while (!current->text[0]) {
|
||
if (!fgets (line, 1000, 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->lines=i+1;
|
||
}
|
||
return current;
|
||
}
|
||
|
||
|
||
|
||
int sub_autodetect (FILE *fd) {
|
||
char line[1001];
|
||
int i,j=0;
|
||
// char *p;
|
||
|
||
while (j < 100) {
|
||
j++;
|
||
if (!fgets (line, 1000, fd))
|
||
return -1;
|
||
|
||
if (sscanf (line, "{%d}{%d}", &i, &i)==2)
|
||
{sub_uses_time=0;return 0;}
|
||
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 1;}
|
||
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 2;}
|
||
if (strstr (line, "<SAMI>"))
|
||
{sub_uses_time=1; return 3;}
|
||
if (sscanf (line, "%d:%d:%d:", &i, &i, &i )==3)
|
||
{sub_uses_time=1;return 4;}
|
||
//TODO: just checking if first line of sub starts with "<" is WAY
|
||
// to weak test for RT
|
||
if (strcmp("<",line))
|
||
{sub_uses_time=1;return 5;}
|
||
}
|
||
|
||
return -1; // too many bad lines
|
||
}
|
||
|
||
|
||
subtitle* sub_read_file (char *filename) {
|
||
FILE *fd;
|
||
int n_max;
|
||
subtitle *first;
|
||
subtitle * (*func[6])(FILE *fd,subtitle *dest)=
|
||
{
|
||
sub_read_line_microdvd,
|
||
sub_read_line_subrip,
|
||
sub_read_line_third,
|
||
sub_read_line_sami,
|
||
sub_read_line_vplayer,
|
||
sub_read_line_rt
|
||
};
|
||
|
||
fd=fopen (filename, "r"); if (!fd) return NULL;
|
||
|
||
sub_format=sub_autodetect (fd);
|
||
if (sub_format==-1) {printf ("SUB: Could not determine file format\n");return NULL;}
|
||
printf ("SUB: Detected subtitle file format: %d\n",sub_format);
|
||
|
||
rewind (fd);
|
||
|
||
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=func[sub_format](fd,&first[sub_num]);
|
||
if(!sub) break; // EOF
|
||
if(sub==ERR) ++sub_errs; else ++sub_num; // Error vs. Valid
|
||
}
|
||
|
||
fclose(fd);
|
||
|
||
// 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");
|
||
|
||
return first;
|
||
}
|
||
|
||
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;
|
||
}
|
||
|
||
char * sub_filename( char * fname )
|
||
{
|
||
char * sub_name = NULL;
|
||
char * sub_tmp = NULL;
|
||
int i;
|
||
#define SUB_EXTS 10
|
||
char * sub_exts[SUB_EXTS] =
|
||
{ ".sub",
|
||
".SUB",
|
||
".srt",
|
||
".SRT",
|
||
".smi",
|
||
".SMI",
|
||
".rt",
|
||
".RT",
|
||
".txt",
|
||
".TXT"};
|
||
|
||
if ( fname == NULL ) return NULL;
|
||
for( i=strlen( fname );i>0;i-- )
|
||
if( fname[i] == '.' )
|
||
{
|
||
sub_tmp=(char *)&fname[i];
|
||
break;
|
||
}
|
||
if ( i == 0 ) return NULL;
|
||
sub_name=strdup( fname );
|
||
for ( i=0;i<SUB_EXTS;i++ )
|
||
{
|
||
FILE * f;
|
||
|
||
strcpy( sub_name,fname );
|
||
f=fopen( strreplace( sub_name,sub_tmp,sub_exts[i] ),"rt" );
|
||
if ( f != NULL )
|
||
{
|
||
fclose( f );
|
||
printf( "SUB: Detected sub file: %s\n",sub_name );
|
||
return sub_name;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
#if 0
|
||
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);
|
||
}
|
||
|
||
subs=sub_read_file(argv[1]);
|
||
if(!subs){
|
||
printf("Couldn't load file... let's write a bugreport :)\n");
|
||
exit(1);
|
||
}
|
||
|
||
for(j=0;j<sub_num;j++){
|
||
egysub=&subs[j];
|
||
printf ("%i line%c (%i-%i) ",
|
||
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);
|
||
return 0;
|
||
}
|
||
#endif
|