mirror of https://github.com/mpv-player/mpv
541 lines
14 KiB
C
541 lines
14 KiB
C
/*
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* Subtitle reader with format autodetection
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*
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* Written by laaz
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* Some code cleanup & realloc() by A'rpi/ESP-team
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* dunnowhat sub format by szabi
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include "subreader.h"
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#define ERR (void *)-1
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int sub_uses_time=0;
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int sub_errs=0;
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int sub_num=0; // number of subtitle structs
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int sub_format=-1; // 0 for microdvd
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// 1 for SubRip
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// 2 for SubViewer
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// 3 for SAMI (smi)
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// 4 for vplayer format
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// 5 for RT format
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// 6 for ssa (Sub Station Alpha)
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// 7 for ... erm ... dunnowhat. tell me if you know
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int eol(char p) {
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return (p=='\r' || p=='\n' || p=='\0');
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}
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static inline void trail_space(char *s) {
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int i;
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while (isspace(*s)) strcpy(s, s + 1);
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i = strlen(s) - 1;
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while (i > 0 && isspace(s[i])) s[i--] = '\0';
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}
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subtitle *sub_read_line_sami(FILE *fd, subtitle *current) {
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static char line[1001];
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static char *s = NULL;
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char text[1000], *p, *q;
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int state;
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current->lines = current->start = current->end = 0;
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state = 0;
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/* read the first line */
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if (!s)
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if (!(s = fgets(line, 1000, fd))) return 0;
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do {
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switch (state) {
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case 0: /* find "START=" */
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s = strstr (s, "Start=");
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if (s) {
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current->start = strtol (s + 6, &s, 0) / 10;
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state = 1; continue;
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}
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break;
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case 1: /* find "<P" */
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if ((s = strstr (s, "<P"))) { s += 2; state = 2; continue; }
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break;
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case 2: /* find ">" */
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if ((s = strchr (s, '>'))) { s++; state = 3; p = text; continue; }
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break;
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case 3: /* get all text until '<' appears */
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if (*s == '\0') { break; }
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else if (*s == '<') { state = 4; }
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else if (!strncasecmp (s, " ", 6)) { *p++ = ' '; s += 6; }
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else if (*s == '\r') { s++; }
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else if (!strncasecmp (s, "<br>", 4) || *s == '\n') {
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*p = '\0'; p = text; trail_space (text);
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if (text[0] != '\0')
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current->text[current->lines++] = strdup (text);
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if (*s == '\n') s++; else s += 4;
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}
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else *p++ = *s++;
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continue;
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case 4: /* get current->end or skip <TAG> */
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q = strstr (s, "Start=");
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if (q) {
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current->end = strtol (q + 6, &q, 0) / 10 - 1;
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*p = '\0'; trail_space (text);
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if (text[0] != '\0')
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current->text[current->lines++] = strdup (text);
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if (current->lines > 0) { state = 99; break; }
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state = 0; continue;
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}
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s = strchr (s, '>');
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if (s) { s++; state = 3; continue; }
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break;
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}
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/* read next line */
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if (state != 99 && !(s = fgets (line, 1000, fd))) return 0;
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} while (state != 99);
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return current;
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}
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char *sub_readtext(char *source, char **dest) {
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int len=0;
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char *p=source;
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while ( !eol(*p) && *p!= '|' ) {
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p++,len++;
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}
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*dest= (char *)malloc (len+1);
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if (!dest) {return ERR;}
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strncpy(*dest, source, len);
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(*dest)[len]=0;
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while (*p=='\r' || *p=='\n' || *p=='|') p++;
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if (*p) return p; // not-last text field
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else return NULL; // last text field
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}
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subtitle *sub_read_line_microdvd(FILE *fd,subtitle *current) {
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char line[1001];
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char line2[1001];
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char *p, *next;
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int i;
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bzero (current, sizeof(current));
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do {
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if (!fgets (line, 1000, fd)) return NULL;
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} while (sscanf (line, "{%ld}{%ld}%[^\r\n]", &(current->start), &(current->end),line2) <3);
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p=line2;
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next=p, i=0;
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while ((next =sub_readtext (next, &(current->text[i])))) {
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if (current->text[i]==ERR) {return ERR;}
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i++;
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if (i>=SUB_MAX_TEXT) { printf ("Too many lines in a subtitle\n");current->lines=i;return current;}
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}
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current->lines= ++i;
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return current;
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}
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subtitle *sub_read_line_subrip(FILE *fd, subtitle *current) {
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char line[1001];
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int a1,a2,a3,a4,b1,b2,b3,b4;
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char *p=NULL, *q=NULL;
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int len;
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bzero (current, sizeof(current));
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while (!current->text[0]) {
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if (!fgets (line, 1000, fd)) return NULL;
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if (sscanf (line, "%d:%d:%d.%d,%d:%d:%d.%d",&a1,&a2,&a3,&a4,&b1,&b2,&b3,&b4) < 8) continue;
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current->start = a1*360000+a2*6000+a3*100+a4;
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current->end = b1*360000+b2*6000+b3*100+b4;
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if (!fgets (line, 1000, fd)) return NULL;
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p=q=line;
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for (current->lines=1; current->lines < SUB_MAX_TEXT; current->lines++) {
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for (q=p,len=0; *p && *p!='\r' && *p!='\n' && strncmp(p,"[br]",4); p++,len++);
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current->text[current->lines-1]=(char *)malloc (len+1);
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if (!current->text[current->lines-1]) return ERR;
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strncpy (current->text[current->lines-1], q, len);
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current->text[current->lines-1][len]='\0';
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if (!*p || *p=='\r' || *p=='\n') break;
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while (*p++!=']');
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}
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}
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return current;
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}
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subtitle *sub_read_line_third(FILE *fd,subtitle *current) {
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char line[1001];
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int a1,a2,a3,a4,b1,b2,b3,b4;
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char *p=NULL;
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int i,len;
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bzero (current, sizeof(current));
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while (!current->text[0]) {
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if (!fgets (line, 1000, fd)) return NULL;
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if ((len=sscanf (line, "%d:%d:%d,%d --> %d:%d:%d,%d",&a1,&a2,&a3,&a4,&b1,&b2,&b3,&b4)) < 8)
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continue;
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current->start = a1*360000+a2*6000+a3*100+a4/10;
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current->end = b1*360000+b2*6000+b3*100+b4/10;
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for (i=0; i<SUB_MAX_TEXT;) {
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if (!fgets (line, 1000, fd)) break;
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len=0;
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for (p=line; *p!='\n' && *p!='\r' && *p; p++,len++);
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if (len) {
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current->text[i]=(char *)malloc (len+1);
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if (!current->text[i]) return ERR;
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strncpy (current->text[i], line, len); current->text[i][len]='\0';
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i++;
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} else {
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break;
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}
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}
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current->lines=i;
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}
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return current;
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}
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subtitle *sub_read_line_vplayer(FILE *fd,subtitle *current) {
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char line[1001];
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char line2[1001];
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int a1,a2,a3,b1,b2,b3;
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char *p=NULL, *next;
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int i,len,len2,plen;
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bzero (current, sizeof(current));
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while (!current->text[0]) {
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if (!fgets (line, 1000, fd)) return NULL;
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if ((len=sscanf (line, "%d:%d:%d:%n",&a1,&a2,&a3,&plen)) < 3)
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continue;
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if (!fgets (line2, 1000, fd)) return NULL;
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if ((len2=sscanf (line2, "%d:%d:%d:",&b1,&b2,&b3)) < 3)
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continue;
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// przewi<77> o linijk<6A> do ty<74>u:
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fseek(fd,-strlen(line2),SEEK_CUR);
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current->start = a1*360000+a2*6000+a3*100;
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current->end = b1*360000+b2*6000+b3*100;
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if ((current->end - current->start) > 1000) {current->end = current->start + 1000;} // not too long though.
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// teraz czas na wkopiowanie stringu
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p=line;
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// finds the body of the subtitle
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for (i=0; i<3; i++){
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p=strchr(p,':')+1;
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}
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i=0;
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if (*p!='|') {
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//
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next = p,i=0;
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while ((next =sub_readtext (next, &(current->text[i])))) {
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if (current->text[i]==ERR) {return ERR;}
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i++;
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if (i>=SUB_MAX_TEXT) { printf ("Too many lines in a subtitle\n");current->lines=i;return current;}
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}
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current->lines=i+1;
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}
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}
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return current;
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}
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subtitle *sub_read_line_rt(FILE *fd,subtitle *current) {
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//TODO: This format uses quite rich (sub/super)set of xhtml
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// I couldn't check it since DTD is not included.
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// WARNING: full XML parses can be required for proper parsing
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char line[1001];
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int a1,a2,a3,a4,b1,b2,b3,b4;
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char *p=NULL,*next=NULL;
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int i,len,plen;
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bzero (current, sizeof(current));
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while (!current->text[0]) {
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if (!fgets (line, 1000, fd)) return NULL;
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//TODO: it seems that format of time is not easily determined, it may be 1:12, 1:12.0 or 0:1:12.0
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//to describe the same moment in time. Maybe there are even more formats in use.
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//if ((len=sscanf (line, "<Time Begin=\"%d:%d:%d.%d\" End=\"%d:%d:%d.%d\"",&a1,&a2,&a3,&a4,&b1,&b2,&b3,&b4)) < 8)
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plen=a1=a2=a3=a4=b1=b2=b3=b4=0;
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if (
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((len=sscanf (line, "<%*[tT]ime %*[bB]egin=\"%d:%d\" %*[Ee]nd=\"%d:%d\"%*[^<]<clear/>%n",&a2,&a3,&b2,&b3,&plen)) < 4) &&
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((len=sscanf (line, "<%*[tT]ime %*[bB]egin=\"%d:%d\" %*[Ee]nd=\"%d:%d.%d\"%*[^<]<clear/>%n",&a2,&a3,&b2,&b3,&b4,&plen)) < 5) &&
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// ((len=sscanf (line, "<%*[tT]ime %*[bB]egin=\"%d:%d.%d\" %*[Ee]nd=\"%d:%d\"%*[^<]<clear/>%n",&a2,&a3,&a4,&b2,&b3,&plen)) < 5) &&
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((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) &&
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((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)
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)
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continue;
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current->start = a1*360000+a2*6000+a3*100+a4/10;
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current->end = b1*360000+b2*6000+b3*100+b4/10;
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p=line; p+=plen;i=0;
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// TODO: I don't know what kind of convention is here for marking multiline subs, maybe <br/> like in xml?
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next = strstr(line,"<clear/>")+8;i=0;
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while ((next =sub_readtext (next, &(current->text[i])))) {
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if (current->text[i]==ERR) {return ERR;}
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i++;
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if (i>=SUB_MAX_TEXT) { printf ("Too many lines in a subtitle\n");current->lines=i;return current;}
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}
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current->lines=i+1;
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}
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return current;
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}
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subtitle *sub_read_line_ssa(FILE *fd,subtitle *current) {
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int hour1, min1, sec1, hunsec1,
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hour2, min2, sec2, hunsec2, nothing;
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char line[1000],
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line2[1000];
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do {
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if (!fgets (line, 1000, fd)) return NULL;
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} while (sscanf (line, "Dialogue: Marked=%d,%d:%d:%d.%d,%d:%d:%d.%d,"
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"*Default,%d,%d,%d,%d,,%[^\n\r]", ¬hing, &hour1, &min1,
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&sec1, &hunsec1,
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&hour2, &min2, &sec2, &hunsec2, ¬hing,
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¬hing, ¬hing, ¬hing, line2) < 14);
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current->lines=1;
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current->start = 360000*hour1 + 6000*min1 + 100*sec1 + hunsec1;
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current->end = 360000*hour2 + 6000*min2 + 100*sec2 + hunsec2;
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current->text[0]=(char *) malloc(strlen(line2)+1);
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strcpy(current->text[0],line2);
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return current;
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}
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subtitle *sub_read_line_dunnowhat(FILE *fd,subtitle *current) {
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char line[1001];
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char text[1001];
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bzero (current, sizeof(current));
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if (!fgets (line, 1000, fd))
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return NULL;
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if (sscanf (line, "%ld,%ld,\"%[^\"]", &(current->start),
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&(current->end), text) <3)
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return ERR;
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current->text[0] = strdup(text);
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current->lines = 1;
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return current;
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}
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int sub_autodetect (FILE *fd) {
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char line[1001];
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int i,j=0;
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// char *p;
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while (j < 100) {
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j++;
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if (!fgets (line, 1000, fd))
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return -1;
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if (sscanf (line, "{%d}{%d}", &i, &i)==2)
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{sub_uses_time=0;return 0;}
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if (sscanf (line, "%d:%d:%d.%d,%d:%d:%d.%d", &i, &i, &i, &i, &i, &i, &i, &i)==8)
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{sub_uses_time=1;return 1;}
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if (sscanf (line, "%d:%d:%d,%d --> %d:%d:%d,%d", &i, &i, &i, &i, &i, &i, &i, &i)==8)
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{sub_uses_time=1;return 2;}
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if (strstr (line, "<SAMI>"))
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{sub_uses_time=1; return 3;}
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if (sscanf (line, "%d:%d:%d:", &i, &i, &i )==3)
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{sub_uses_time=1;return 4;}
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//TODO: just checking if first line of sub starts with "<" is WAY
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// too weak test for RT
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// Please someone who knows the format of RT... FIX IT!!!
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// It may conflict with other sub formats in the future (actually it doesn't)
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if ( *line == '<' )
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{sub_uses_time=1;return 5;}
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// I have only seen only 1 piece of .ssa file.
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// It may be not correct (tell me if it's not)
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if (!memcmp(line, "Dialogue: Marked", 16))
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{sub_uses_time=1; return 6;}
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if (sscanf (line, "%d,%d,\"%c", &i, &i, (char *) &i) == 3)
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{sub_uses_time=0;return 7;}
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}
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return -1; // too many bad lines
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}
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subtitle* sub_read_file (char *filename) {
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FILE *fd;
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int n_max;
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subtitle *first;
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subtitle * (*func[])(FILE *fd,subtitle *dest)=
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{
|
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sub_read_line_microdvd,
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sub_read_line_subrip,
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sub_read_line_third,
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sub_read_line_sami,
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sub_read_line_vplayer,
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sub_read_line_rt,
|
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sub_read_line_ssa,
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sub_read_line_dunnowhat
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};
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fd=fopen (filename, "r"); if (!fd) return NULL;
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sub_format=sub_autodetect (fd);
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if (sub_format==-1) {printf ("SUB: Could not determine file format\n");return NULL;}
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printf ("SUB: Detected subtitle file format: %d\n",sub_format);
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|
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rewind (fd);
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sub_num=0;n_max=32;
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first=(subtitle *)malloc(n_max*sizeof(subtitle));
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if(!first) return NULL;
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|
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while(1){
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subtitle *sub;
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if(sub_num>=n_max){
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n_max+=16;
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first=realloc(first,n_max*sizeof(subtitle));
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}
|
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sub=func[sub_format](fd,&first[sub_num]);
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if(!sub) break; // EOF
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if(sub==ERR) ++sub_errs; else ++sub_num; // Error vs. Valid
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}
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|
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fclose(fd);
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|
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// printf ("SUB: Subtitle format %s time.\n", sub_uses_time?"uses":"doesn't use");
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printf ("SUB: Read %i subtitles", sub_num);
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if (sub_errs) printf (", %i bad line(s).\n", sub_errs);
|
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else printf (".\n");
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||
|
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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;
|
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}
|
||
#endif
|
||
|
||
char * sub_filename(char* path, char * fname )
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||
{
|
||
extern int sub_utf8;
|
||
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"};
|
||
|
||
|
||
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;
|
||
for ( i=0;i<(sizeof(sub_exts)/sizeof(char*));i++ ) {
|
||
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;
|
||
}
|
||
|
||
#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 (%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);
|
||
return 0;
|
||
}
|
||
#endif
|