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c6b03be894
mpv/sub/subreader.c
wm4 c6b03be894 core: display subtitle codec in track listing 
Also switch the subrip and subviewer names, which obviously have been
confused.
2013-04-20 23:28:27 +02:00

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/*
* Subtitle reader with format autodetection
*
* Copyright (c) 2001 laaz
* Some code cleanup & realloc() by A'rpi/ESP-team
*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <dirent.h>
#include <ctype.h>
#include "config.h"
#include "core/mp_msg.h"
#include "subreader.h"
#include "core/mp_common.h"
#include "subassconvert.h"
#include "core/options.h"
#include "stream/stream.h"
#include "libavutil/common.h"
#include "libavutil/avstring.h"
#ifdef CONFIG_ENCA
#include <enca.h>
#endif
#define ERR ((void *) -1)
#ifdef CONFIG_ICONV
#include <iconv.h>
#endif
char *sub_cp=NULL;
int suboverlap_enabled = 1;
// Parameter struct for the format-specific readline functions
struct readline_args {
int utf16;
struct MPOpts *opts;
};
/* Maximal length of line of a subtitle */
#define LINE_LEN 1000
static float mpsub_position=0;
static float mpsub_multiplier=1.;
static int sub_slacktime = 20000; //20 sec
int sub_no_text_pp=0; // 1 => do not apply text post-processing
// like {\...} elimination in SSA format.
int sub_match_fuzziness=0; // level of sub name matching fuzziness
/* Use the SUB_* constant defined in the header file */
int sub_format=SUB_INVALID;
/*
Some subtitling formats, namely AQT and Subrip09, define the end of a
subtitle as the beginning of the following. Since currently we read one
subtitle at time, for these format we keep two global *subtitle,
previous_aqt_sub and previous_subrip09_sub, pointing to previous subtitle,
so we can change its end when we read current subtitle starting time.
We use a single global unsigned long,
previous_sub_end, for both (and even future) formats, to store the end of
the previous sub: it is initialized to 0 in sub_read_file and eventually
modified by sub_read_aqt_line or sub_read_subrip09_line.
*/
unsigned long previous_sub_end;
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';
}
static char *stristr(const char *haystack, const char *needle) {
int len = 0;
const char *p = haystack;
if (!(haystack && needle)) return NULL;
len=strlen(needle);
while (*p != '\0') {
if (strncasecmp(p, needle, len) == 0) return (char*)p;
p++;
}
return NULL;
}
static void sami_add_line(subtitle *current, char *buffer, char **pos) {
char *p = *pos;
*p = 0;
trail_space(buffer);
if (*buffer && current->lines < SUB_MAX_TEXT)
current->text[current->lines++] = strdup(buffer);
*pos = buffer;
}
static subtitle *sub_read_line_sami(stream_t* st, subtitle *current,
struct readline_args *args)
{
int utf16 = args->utf16;
static char line[LINE_LEN+1];
static char *s = NULL, *slacktime_s;
char text[LINE_LEN+1], *p=NULL, *q;
int state;
current->lines = current->start = current->end = 0;
current->alignment = SUB_ALIGNMENT_BOTTOMCENTER;
state = 0;
/* read the first line */
if (!s)
if (!(s = stream_read_line(st, line, LINE_LEN, utf16))) return 0;
do {
switch (state) {
case 0: /* find "START=" or "Slacktime:" */
slacktime_s = stristr (s, "Slacktime:");
if (slacktime_s)
sub_slacktime = strtol (slacktime_s+10, NULL, 0) / 10;
s = stristr (s, "Start=");
if (s) {
current->start = strtol (s + 6, &s, 0) / 10;
/* eat '>' */
for (; *s != '>' && *s != '\0'; s++);
s++;
state = 1; continue;
}
break;
case 1: /* find (optional) "<P", skip other TAGs */
for (; *s == ' ' || *s == '\t'; s++); /* strip blanks, if any */
if (*s == '\0') break;
if (*s != '<') { state = 3; p = text; continue; } /* not a TAG */
s++;
if (*s == 'P' || *s == 'p') { s++; state = 2; continue; } /* found '<P' */
for (; *s != '>' && *s != '\0'; s++); /* skip remains of non-<P> TAG */
if (*s == '\0')
break;
s++;
continue;
case 2: /* find ">" */
if ((s = strchr (s, '>'))) { s++; state = 3; p = text; continue; }
break;
case 3: /* get all text until '<' appears */
if (p - text >= LINE_LEN)
sami_add_line(current, text, &p);
if (*s == '\0') break;
else if (!strncasecmp (s, "<br>", 4)) {
sami_add_line(current, text, &p);
s += 4;
}
else if ((*s == '{') && !sub_no_text_pp) { state = 5; ++s; continue; }
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 = stristr (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;
case 5: /* get rid of {...} text, but read the alignment code */
if ((*s == '\\') && (*(s + 1) == 'a') && !sub_no_text_pp) {
if (stristr(s, "\\a1") != NULL) {
current->alignment = SUB_ALIGNMENT_BOTTOMLEFT;
s = s + 3;
}
if (stristr(s, "\\a2") != NULL) {
current->alignment = SUB_ALIGNMENT_BOTTOMCENTER;
s = s + 3;
} else if (stristr(s, "\\a3") != NULL) {
current->alignment = SUB_ALIGNMENT_BOTTOMRIGHT;
s = s + 3;
} else if ((stristr(s, "\\a4") != NULL) || (stristr(s, "\\a5") != NULL) || (stristr(s, "\\a8") != NULL)) {
current->alignment = SUB_ALIGNMENT_TOPLEFT;
s = s + 3;
} else if (stristr(s, "\\a6") != NULL) {
current->alignment = SUB_ALIGNMENT_TOPCENTER;
s = s + 3;
} else if (stristr(s, "\\a7") != NULL) {
current->alignment = SUB_ALIGNMENT_TOPRIGHT;
s = s + 3;
} else if (stristr(s, "\\a9") != NULL) {
current->alignment = SUB_ALIGNMENT_MIDDLELEFT;
s = s + 3;
} else if (stristr(s, "\\a10") != NULL) {
current->alignment = SUB_ALIGNMENT_MIDDLECENTER;
s = s + 4;
} else if (stristr(s, "\\a11") != NULL) {
current->alignment = SUB_ALIGNMENT_MIDDLERIGHT;
s = s + 4;
}
}
if (*s == '}') state = 3;
++s;
continue;
}
/* read next line */
if (state != 99 && !(s = stream_read_line (st, line, LINE_LEN, utf16))) {
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;
sami_add_line(current, text, &p);
}
return current;
}
static const char *sub_readtext(const char *source, char **dest) {
int len=0;
const char *p=source;
// printf("src=%p dest=%p \n",source,dest);
while ( !eol(*p) && *p!= '|' ) {
p++,len++;
}
*dest= 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
}
static subtitle *set_multiline_text(subtitle *current, const char *text, int start)
{
int i = start;
while ((text = sub_readtext(text, current->text + i))) {
if (current->text[i] == ERR) return ERR;
i++;
if (i >= SUB_MAX_TEXT) {
mp_msg(MSGT_SUBREADER, MSGL_WARN, "Too many lines in a subtitle\n");
current->lines = i;
return current;
}
}
current->lines = i + 1;
return current;
}
static subtitle *sub_read_line_microdvd(stream_t *st,subtitle *current,
struct readline_args *args)
{
int utf16 = args->utf16;
char line[LINE_LEN+1];
char line2[LINE_LEN+1];
char *p;
do {
if (!stream_read_line (st, line, LINE_LEN, utf16)) return NULL;
} while ((sscanf (line,
"{%ld}{}%[^\r\n]",
&(current->start), line2) < 2) &&
(sscanf (line,
"{%ld}{%ld}%[^\r\n]",
&(current->start), &(current->end), line2) < 3));
if (args->opts->ass_enabled) {
subassconvert_microdvd(line2, line, LINE_LEN + 1);
p = line;
} else
p = line2;
return set_multiline_text(current, p, 0);
}
static subtitle *sub_read_line_mpl2(stream_t *st,subtitle *current,
struct readline_args *args)
{
int utf16 = args->utf16;
char line[LINE_LEN+1];
char line2[LINE_LEN+1];
do {
if (!stream_read_line (st, line, LINE_LEN, utf16)) return NULL;
} while ((sscanf (line,
"[%ld][%ld]%[^\r\n]",
&(current->start), &(current->end), line2) < 3));
current->start *= 10;
current->end *= 10;
return set_multiline_text(current, line2, 0);
}
static subtitle *sub_read_line_subrip(stream_t* st, subtitle *current,
struct readline_args *args)
{
int utf16 = args->utf16;
char line[LINE_LEN+1];
int a1,a2,a3,a4,b1,b2,b3,b4;
char *p=NULL, *q=NULL;
int len;
while (1) {
if (!stream_read_line (st, line, LINE_LEN, utf16)) 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 (!stream_read_line (st, line, LINE_LEN, utf16)) 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' && *p!='|' && strncmp(p,"[br]",4); p++,len++);
current->text[current->lines-1]=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;
if (*p=='|') p++;
else while (*p++!=']');
}
break;
}
return current;
}
static subtitle *sub_ass_read_line_subviewer(stream_t *st, subtitle *current,
struct readline_args *args)
{
int utf16 = args->utf16;
int a1, a2, a3, a4, b1, b2, b3, b4, j = 0;
while (!current->text[0]) {
char line[LINE_LEN + 1], full_line[LINE_LEN + 1], sep;
int i;
/* Parse SubRip header */
if (!stream_read_line(st, line, LINE_LEN, utf16))
return NULL;
if (sscanf(line, "%d:%d:%d%[,.:]%d --> %d:%d:%d%[,.:]%d",
&a1, &a2, &a3, &sep, &a4, &b1, &b2, &b3, &sep, &b4) < 10)
continue;
current->start = a1 * 360000 + a2 * 6000 + a3 * 100 + a4 / 10;
current->end = b1 * 360000 + b2 * 6000 + b3 * 100 + b4 / 10;
/* Concat lines */
full_line[0] = 0;
for (i = 0; i < SUB_MAX_TEXT; i++) {
int blank = 1, len = 0;
char *p;
if (!stream_read_line(st, line, LINE_LEN, utf16))
break;
for (p = line; *p != '\n' && *p != '\r' && *p; p++, len++)
if (*p != ' ' && *p != '\t')
blank = 0;
if (blank)
break;
*p = 0;
if (!(j + 1 + len < sizeof(full_line) - 1))
break;
if (j != 0)
full_line[j++] = '\n';
strcpy(&full_line[j], line);
j += len;
}
/* Use the ASS/SSA converter to transform the whole lines */
if (full_line[0]) {
char converted_line[LINE_LEN + 1];
subassconvert_subrip(full_line, converted_line, LINE_LEN + 1);
current->text[0] = strdup(converted_line);
current->lines = 1;
}
}
return current;
}
static subtitle *sub_read_line_subviewer(stream_t *st,subtitle *current,
struct readline_args *args)
{
int utf16 = args->utf16;
char line[LINE_LEN+1];
int a1,a2,a3,a4,b1,b2,b3,b4;
char *p=NULL;
int i,len;
if (args->opts->ass_enabled)
return sub_ass_read_line_subviewer(st, current, args);
while (!current->text[0]) {
if (!stream_read_line (st, line, LINE_LEN, utf16)) return NULL;
if ((len=sscanf (line, "%d:%d:%d%[,.:]%d --> %d:%d:%d%[,.:]%d",&a1,&a2,&a3,(char *)&i,&a4,&b1,&b2,&b3,(char *)&i,&b4)) < 10)
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;) {
int blank = 1;
if (!stream_read_line (st, line, LINE_LEN, utf16)) break;
len=0;
for (p=line; *p!='\n' && *p!='\r' && *p; p++,len++)
if (*p != ' ' && *p != '\t')
blank = 0;
if (len && !blank) {
int j=0,skip=0;
char *curptr=current->text[i]=malloc (len+1);
if (!current->text[i]) return ERR;
//strncpy (current->text[i], line, len); current->text[i][len]='\0';
for(; j<len; j++) {
/* let's filter html tags ::atmos */
if(line[j]=='>') {
skip=0;
continue;
}
if(line[j]=='<') {
skip=1;
continue;
}
if(skip) {
continue;
}
*curptr=line[j];
curptr++;
}
*curptr='\0';
i++;
} else {
break;
}
}
current->lines=i;
}
return current;
}
static subtitle *sub_read_line_subviewer2(stream_t *st,subtitle *current,
struct readline_args *args)
{
int utf16 = args->utf16;
char line[LINE_LEN+1];
int a1,a2,a3,a4;
char *p=NULL;
int i,len;
while (!current->text[0]) {
if (!stream_read_line (st, line, LINE_LEN, utf16)) return NULL;
if (line[0]!='{')
continue;
if ((len=sscanf (line, "{T %d:%d:%d:%d",&a1,&a2,&a3,&a4)) < 4)
continue;
current->start = a1*360000+a2*6000+a3*100+a4/10;
for (i=0; i<SUB_MAX_TEXT;) {
if (!stream_read_line (st, line, LINE_LEN, utf16)) break;
if (line[0]=='}') break;
len=0;
for (p=line; *p!='\n' && *p!='\r' && *p; ++p,++len);
if (len) {
current->text[i]=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;
}
static subtitle *sub_read_line_vplayer(stream_t *st,subtitle *current,
struct readline_args *args)
{
int utf16 = args->utf16;
char line[LINE_LEN+1];
int a1,a2,a3;
char *p=NULL, separator;
int len,plen;
while (!current->text[0]) {
if (!stream_read_line (st, line, LINE_LEN, utf16)) 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 ];
if (*p!='|') {
//
return set_multiline_text(current, p, 0);
}
}
return current;
}
static subtitle *sub_read_line_rt(stream_t *st,subtitle *current,
struct readline_args *args)
{
int utf16 = args->utf16;
//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 len,plen;
while (!current->text[0]) {
if (!stream_read_line (st, line, LINE_LEN, utf16)) 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",&a3,&a4,&b3,&b4,&plen)) < 4) &&
((len=sscanf (line, "<%*[tT]ime %*[bB]egin=\"%d.%d\" %*[Ee]nd=\"%d:%d.%d\"%*[^<]<clear/>%n",&a3,&a4,&b2,&b3,&b4,&plen)) < 5) &&
((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) &&
//now try it without end time
((len=sscanf (line, "<%*[tT]ime %*[bB]egin=\"%d.%d\"%*[^<]<clear/>%n",&a3,&a4,&plen)) < 2) &&
((len=sscanf (line, "<%*[tT]ime %*[bB]egin=\"%d:%d\"%*[^<]<clear/>%n",&a2,&a3,&plen)) < 2) &&
((len=sscanf (line, "<%*[tT]ime %*[bB]egin=\"%d:%d.%d\"%*[^<]<clear/>%n",&a2,&a3,&a4,&plen)) < 3) &&
((len=sscanf (line, "<%*[tT]ime %*[bB]egin=\"%d:%d:%d.%d\"%*[^<]<clear/>%n",&a1,&a2,&a3,&a4,&plen)) < 4)
)
continue;
current->start = a1*360000+a2*6000+a3*100+a4/10;
current->end = b1*360000+b2*6000+b3*100+b4/10;
if (b1 == 0 && b2 == 0 && b3 == 0 && b4 == 0)
current->end = current->start+200;
p=line; p+=plen;
// TODO: I don't know what kind of convention is here for marking multiline subs, maybe <br/> like in xml?
next = strstr(line,"<clear/>");
if(next && strlen(next)>8){
next+=8;
return set_multiline_text(current, next, 0);
}
}
return current;
}
static subtitle *sub_read_line_ssa(stream_t *st,subtitle *current,
struct readline_args *args)
{
/* Instead of hardcoding the expected fields and their order on
* each dialogue line, this code should parse the "Format: " line
* which lists the fields used in the script. As is, this may not
* work correctly with all scripts.
*/
int utf16 = args->utf16;
int comma;
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 (!stream_read_line (st, line, LINE_LEN, utf16)) 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
&&
sscanf (line, "Dialogue: %d,%d:%d:%d.%d,%d:%d:%d.%d"
"%[^\n\r]", &nothing,
&hour1, &min1, &sec1, &hunsec1,
&hour2, &min2, &sec2, &hunsec2,
line3) < 9 );
line2=strchr(line3, ',');
if (!line2) return NULL;
for (comma = 3; comma < 9; comma ++)
if (!(line2 = strchr(++line2, ',')))
return NULL;
line2++;
current->lines=0;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]=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);
current->lines++;
return current;
}
static void sub_pp_ssa(subtitle *sub)
{
for (int i = 0; i < sub->lines; i++) {
char *s, *d;
s = d = sub->text[i];
while (1) {
while (*s == '{')
while (*s && *s++ != '}');
if (!(*d++ = *s++))
break;
}
}
}
/*
* PJS subtitles reader.
* That's the "Phoenix Japanimation Society" format.
* I found some of them in http://www.scriptsclub.org/ (used for anime).
* The time is in tenths of second.
*
* by set, based on code by szabi (dunnowhat sub format ;-)
*/
static subtitle *sub_read_line_pjs(stream_t *st,subtitle *current,
struct readline_args *args)
{
int utf16 = args->utf16;
char line[LINE_LEN+1];
char text[LINE_LEN+1], *s, *d;
if (!stream_read_line (st, line, LINE_LEN, utf16))
return NULL;
/* skip spaces */
for (s=line; *s && isspace(*s); s++);
/* allow empty lines at the end of the file */
if (*s==0)
return NULL;
/* get the time */
if (sscanf (s, "%ld,%ld,", &(current->start),
&(current->end)) <2) {
return ERR;
}
/* the files I have are in tenths of second */
current->start *= 10;
current->end *= 10;
/* walk to the beggining of the string */
for (; *s; s++) if (*s==',') break;
if (*s) {
for (s++; *s; s++) if (*s==',') break;
if (*s) s++;
}
if (*s!='"') {
return ERR;
}
/* copy the string to the text buffer */
for (s++, d=text; *s && *s!='"'; s++, d++)
*d=*s;
*d=0;
current->text[0] = strdup(text);
current->lines = 1;
return current;
}
static subtitle *sub_read_line_mpsub(stream_t *st, subtitle *current,
struct readline_args *args)
{
int utf16 = args->utf16;
char line[LINE_LEN+1];
float a,b;
int num=0;
char *p, *q;
do
{
if (!stream_read_line(st, line, LINE_LEN, utf16)) return NULL;
} while (sscanf (line, "%f %f", &a, &b) !=2);
mpsub_position += a*mpsub_multiplier;
current->start=(int) mpsub_position;
mpsub_position += b*mpsub_multiplier;
current->end=(int) mpsub_position;
while (num < SUB_MAX_TEXT) {
if (!stream_read_line (st, line, LINE_LEN, utf16)) {
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
}
static subtitle *sub_read_line_aqt(stream_t *st,subtitle *current,
struct readline_args *args)
{
int utf16 = args->utf16;
char line[LINE_LEN+1];
retry:
while (1) {
// try to locate next subtitle
if (!stream_read_line (st, line, LINE_LEN, utf16))
return NULL;
if (!(sscanf (line, "-->> %ld", &(current->start)) <1))
break;
}
if (!previous_sub_end)
previous_sub_end = (current->start) ? current->start - 1 : 0;
if (!stream_read_line (st, line, LINE_LEN, utf16))
return NULL;
sub_readtext((char *) &line,&current->text[0]);
current->lines = 1;
current->end = current->start; // will be corrected by next subtitle
if (!stream_read_line (st, line, LINE_LEN, utf16))
return current;
if (set_multiline_text(current, line, 1) == ERR)
return ERR;
if (!strlen(current->text[0]) && !strlen(current->text[1]))
goto retry;
return current;
}
static subtitle *sub_read_line_subrip09(stream_t *st,subtitle *current,
struct readline_args *args)
{
int utf16 = args->utf16;
char line[LINE_LEN+1];
int a1,a2,a3;
int len;
retry:
while (1) {
// try to locate next subtitle
if (!stream_read_line (st, line, LINE_LEN, utf16))
return NULL;
if (!((len=sscanf (line, "[%d:%d:%d]",&a1,&a2,&a3)) < 3))
break;
}
current->start = a1*360000+a2*6000+a3*100;
if (!previous_sub_end)
previous_sub_end = (current->start) ? current->start - 1 : 0;
if (!stream_read_line (st, line, LINE_LEN, utf16))
return NULL;
current->text[0]=""; // just to be sure that string is clear
if (set_multiline_text(current, line, 0) == ERR)
return ERR;
if (!strlen(current->text[0]) && current->lines <= 1)
goto retry;
return current;
}
static subtitle *sub_read_line_jacosub(stream_t* st, subtitle * current,
struct readline_args *args)
{
int utf16 = args->utf16;
char line1[LINE_LEN], line2[LINE_LEN], directive[LINE_LEN], *p, *q;
unsigned a1, a2, a3, a4, b1, b2, b3, b4, comment = 0;
static unsigned jacoTimeres = 30;
static int jacoShift = 0;
memset(current, 0, sizeof(subtitle));
memset(line1, 0, LINE_LEN);
memset(line2, 0, LINE_LEN);
memset(directive, 0, LINE_LEN);
while (!current->text[0]) {
if (!stream_read_line(st, line1, LINE_LEN, utf16)) {
return NULL;
}
if (sscanf
(line1, "%u:%u:%u.%u %u:%u:%u.%u %[^\n\r]", &a1, &a2, &a3, &a4,
&b1, &b2, &b3, &b4, line2) < 9) {
if (sscanf(line1, "@%u @%u %[^\n\r]", &a4, &b4, line2) < 3) {
if (line1[0] == '#') {
int hours = 0, minutes = 0, seconds, delta, inverter =
1;
unsigned units = jacoShift;
switch (toupper(line1[1])) {
case 'S':
if (isalpha(line1[2])) {
delta = 6;
} else {
delta = 2;
}
if (sscanf(&line1[delta], "%d", &hours)) {
if (hours < 0) {
hours *= -1;
inverter = -1;
}
if (sscanf(&line1[delta], "%*d:%d", &minutes)) {
if (sscanf
(&line1[delta], "%*d:%*d:%d",
&seconds)) {
sscanf(&line1[delta], "%*d:%*d:%*d.%d",
&units);
} else {
hours = 0;
sscanf(&line1[delta], "%d:%d.%d",
&minutes, &seconds, &units);
minutes *= inverter;
}
} else {
hours = minutes = 0;
sscanf(&line1[delta], "%d.%d", &seconds,
&units);
seconds *= inverter;
}
jacoShift =
((hours * 3600 + minutes * 60 +
seconds) * jacoTimeres +
units) * inverter;
}
break;
case 'T':
if (isalpha(line1[2])) {
delta = 8;
} else {
delta = 2;
}
sscanf(&line1[delta], "%u", &jacoTimeres);
break;
}
}
continue;
} else {
current->start =
(unsigned long) ((a4 + jacoShift) * 100.0 /
jacoTimeres);
current->end =
(unsigned long) ((b4 + jacoShift) * 100.0 /
jacoTimeres);
}
} else {
current->start =
(unsigned
long) (((a1 * 3600 + a2 * 60 + a3) * jacoTimeres + a4 +
jacoShift) * 100.0 / jacoTimeres);
current->end =
(unsigned
long) (((b1 * 3600 + b2 * 60 + b3) * jacoTimeres + b4 +
jacoShift) * 100.0 / jacoTimeres);
}
current->lines = 0;
p = line2;
while ((*p == ' ') || (*p == '\t')) {
++p;
}
if (isalpha(*p)||*p == '[') {
int cont, jLength;
if (sscanf(p, "%s %[^\n\r]", directive, line1) < 2)
return (subtitle *) ERR;
jLength = strlen(directive);
for (cont = 0; cont < jLength; ++cont) {
if (isalpha(*(directive + cont)))
*(directive + cont) = toupper(*(directive + cont));
}
if ((strstr(directive, "RDB") != NULL)
|| (strstr(directive, "RDC") != NULL)
|| (strstr(directive, "RLB") != NULL)
|| (strstr(directive, "RLG") != NULL)) {
continue;
}
if (strstr(directive, "JL") != NULL) {
current->alignment = SUB_ALIGNMENT_BOTTOMLEFT;
} else if (strstr(directive, "JR") != NULL) {
current->alignment = SUB_ALIGNMENT_BOTTOMRIGHT;
} else {
current->alignment = SUB_ALIGNMENT_BOTTOMCENTER;
}
strcpy(line2, line1);
p = line2;
}
for (q = line1; (!eol(*p)) && (current->lines < SUB_MAX_TEXT); ++p) {
switch (*p) {
case '{':
comment++;
break;
case '}':
if (comment) {
--comment;
//the next line to get rid of a blank after the comment
if ((*(p + 1)) == ' ')
p++;
}
break;
case '~':
if (!comment) {
*q = ' ';
++q;
}
break;
case ' ':
case '\t':
if ((*(p + 1) == ' ') || (*(p + 1) == '\t'))
break;
if (!comment) {
*q = ' ';
++q;
}
break;
case '\\':
if (*(p + 1) == 'n') {
*q = '\0';
q = line1;
current->text[current->lines++] = strdup(line1);
++p;
break;
}
if ((toupper(*(p + 1)) == 'C')
|| (toupper(*(p + 1)) == 'F')) {
++p,++p;
break;
}
if ((*(p + 1) == 'B') || (*(p + 1) == 'b') || (*(p + 1) == 'D') || //actually this means "insert current date here"
(*(p + 1) == 'I') || (*(p + 1) == 'i') || (*(p + 1) == 'N') || (*(p + 1) == 'T') || //actually this means "insert current time here"
(*(p + 1) == 'U') || (*(p + 1) == 'u')) {
++p;
break;
}
if ((*(p + 1) == '\\') ||
(*(p + 1) == '~') || (*(p + 1) == '{')) {
++p;
} else if (eol(*(p + 1))) {
if (!stream_read_line(st, directive, LINE_LEN, utf16))
return NULL;
trail_space(directive);
av_strlcat(line2, directive, LINE_LEN);
break;
}
default:
if (!comment) {
*q = *p;
++q;
}
} //-- switch
} //-- for
*q = '\0';
if (current->lines < SUB_MAX_TEXT)
current->text[current->lines] = strdup(line1);
} //-- while
if (current->lines < SUB_MAX_TEXT)
current->lines++;
return current;
}
static int sub_autodetect (stream_t* st, int *uses_time, int utf16) {
char line[LINE_LEN+1];
int i,j=0;
while (j < 100) {
j++;
if (!stream_read_line (st, line, LINE_LEN, utf16))
return SUB_INVALID;
if (sscanf (line, "{%d}{%d}", &i, &i)==2)
{*uses_time=0;return SUB_MICRODVD;}
if (sscanf (line, "{%d}{}", &i)==1)
{*uses_time=0;return SUB_MICRODVD;}
if (sscanf (line, "[%d][%d]", &i, &i)==2)
{*uses_time=1;return SUB_MPL2;}
if (sscanf (line, "%d:%d:%d.%d,%d:%d:%d.%d", &i, &i, &i, &i, &i, &i, &i, &i)==8)
{*uses_time=1;return SUB_SUBRIP;}
if (sscanf (line, "%d:%d:%d%[,.:]%d --> %d:%d:%d%[,.:]%d", &i, &i, &i, (char *)&i, &i, &i, &i, &i, (char *)&i, &i)==10)
{*uses_time=1;return SUB_SUBVIEWER;}
if (sscanf (line, "{T %d:%d:%d:%d",&i, &i, &i, &i)==4)
{*uses_time=1;return SUB_SUBVIEWER2;}
if (strstr (line, "<SAMI>"))
{*uses_time=1; return SUB_SAMI;}
if (sscanf(line, "%d:%d:%d.%d %d:%d:%d.%d", &i, &i, &i, &i, &i, &i, &i, &i) == 8)
{*uses_time = 1; return SUB_JACOSUB;}
if (sscanf(line, "@%d @%d", &i, &i) == 2)
{*uses_time = 1; return SUB_JACOSUB;}
if (sscanf (line, "%d:%d:%d:", &i, &i, &i )==3)
{*uses_time=1;return SUB_VPLAYER;}
if (sscanf (line, "%d:%d:%d ", &i, &i, &i )==3)
{*uses_time=1;return SUB_VPLAYER;}
if (!strncasecmp(line, "<window", 7))
{*uses_time=1;return SUB_RT;}
if (!memcmp(line, "Dialogue: Marked", 16))
{*uses_time=1; return SUB_SSA;}
if (!memcmp(line, "Dialogue: ", 10))
{*uses_time=1; return SUB_SSA;}
if (sscanf (line, "%d,%d,\"%c", &i, &i, (char *) &i) == 3)
{*uses_time=1;return SUB_PJS;}
if (sscanf (line, "FORMAT=%d", &i) == 1)
{*uses_time=0; return SUB_MPSUB;}
if (!memcmp(line, "FORMAT=TIME", 11))
{*uses_time=1; return SUB_MPSUB;}
if (strstr (line, "-->>"))
{*uses_time=0; return SUB_AQTITLE;}
if (sscanf (line, "[%d:%d:%d]", &i, &i, &i)==3)
{*uses_time=1;return SUB_SUBRIP09;}
}
return SUB_INVALID; // too many bad lines
}
extern float sub_delay;
extern float sub_fps;
#ifdef CONFIG_ICONV
static iconv_t icdsc = (iconv_t)(-1);
void subcp_open (stream_t *st)
{
char *tocp = "UTF-8";
if (sub_cp){
const char *cp_tmp = sub_cp;
#ifdef CONFIG_ENCA
char enca_lang[3], enca_fallback[100];
if (sscanf(sub_cp, "enca:%2s:%99s", enca_lang, enca_fallback) == 2
|| sscanf(sub_cp, "ENCA:%2s:%99s", enca_lang, enca_fallback) == 2) {
if (st && st->flags & MP_STREAM_SEEK ) {
cp_tmp = guess_cp(st, enca_lang, enca_fallback);
} else {
cp_tmp = enca_fallback;
if (st)
mp_msg(MSGT_SUBREADER,MSGL_WARN,"SUB: enca failed, stream must be seekable.\n");
}
}
#endif
if ((icdsc = iconv_open (tocp, cp_tmp)) != (iconv_t)(-1)){
mp_msg(MSGT_SUBREADER,MSGL_V,"SUB: opened iconv descriptor.\n");
} else
mp_msg(MSGT_SUBREADER,MSGL_ERR,"SUB: error opening iconv descriptor.\n");
}
}
void subcp_close (void)
{
if (icdsc != (iconv_t)(-1)){
(void) iconv_close (icdsc);
icdsc = (iconv_t)(-1);
mp_msg(MSGT_SUBREADER,MSGL_V,"SUB: closed iconv descriptor.\n");
}
}
subtitle* subcp_recode (subtitle *sub)
{
int l=sub->lines;
size_t ileft, oleft;
char *op, *ip, *ot;
if(icdsc == (iconv_t)(-1)) return sub;
while (l){
ip = sub->text[--l];
ileft = strlen(ip);
oleft = 4 * ileft;
if (!(ot = malloc(oleft + 1)))
abort();
op = ot;
if (iconv(icdsc, &ip, &ileft,
&op, &oleft) == (size_t)(-1)) {
mp_msg(MSGT_SUBREADER,MSGL_WARN,"SUB: error recoding line.\n");
free(ot);
continue;
}
// In some stateful encodings, we must clear the state to handle the last character
if (iconv(icdsc, NULL, NULL,
&op, &oleft) == (size_t)(-1)) {
mp_msg(MSGT_SUBREADER,MSGL_WARN,"SUB: error recoding line, can't clear encoding state.\n");
}
*op='\0' ;
free (sub->text[l]);
sub->text[l] = ot;
}
return sub;
}
#endif
static void adjust_subs_time(subtitle* sub, float subtime, float fps, int block,
int sub_num, int sub_uses_time) {
int n,m;
subtitle* nextsub;
int i = sub_num;
unsigned long subfms = (sub_uses_time ? 100 : fps) * subtime;
unsigned long overlap = (sub_uses_time ? 100 : fps) / 5; // 0.2s
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(block){
if ((sub->end > nextsub->start) && (sub->end <= nextsub->start + overlap)) {
// these subtitles overlap for less than 0.2 seconds
// and would result in very short overlapping subtitle
// so let's fix the problem here, before overlapping code
// get its hands on them
unsigned delta = sub->end - nextsub->start, half = delta / 2;
sub->end -= half + 1;
nextsub->start += delta - half;
}
if (sub->end >= nextsub->start){
sub->end = nextsub->start - 1;
if (sub->end - sub->start > subfms)
sub->end = sub->start + subfms;
if (!m)
n++;
}
}
/* Theory:
* Movies are often converted from FILM (24 fps)
* to PAL (25) by simply speeding it up, so we
* to multiply the original timestmaps by
* (Movie's FPS / Subtitle's (guessed) FPS)
* so eg. for 23.98 fps movie and PAL time based
* subtitles we say -subfps 25 and we're fine!
*/
/* timed sub fps correction ::atmos */
/* the frame-based case is handled in mpcommon.c
* where find_sub is called */
if(sub_uses_time && sub_fps) {
sub->start *= sub_fps/fps;
sub->end *= sub_fps/fps;
}
sub = nextsub;
m = 0;
}
if (n) mp_msg(MSGT_SUBREADER,MSGL_V,"SUB: Adjusted %d subtitle(s).\n", n);
}
struct subreader {
subtitle * (*read)(stream_t *st, subtitle *dest,
struct readline_args *args);
void (*post)(subtitle *dest);
const char *name;
};
#ifdef CONFIG_ENCA
const char* guess_buffer_cp(unsigned char* buffer, int buflen, const char *preferred_language, const char *fallback)
{
const char **languages;
size_t langcnt;
EncaAnalyser analyser;
EncaEncoding encoding;
const char *detected_sub_cp = NULL;
int i;
languages = enca_get_languages(&langcnt);
mp_msg(MSGT_SUBREADER, MSGL_V, "ENCA supported languages: ");
for (i = 0; i < langcnt; i++) {
mp_msg(MSGT_SUBREADER, MSGL_V, "%s ", languages[i]);
}
mp_msg(MSGT_SUBREADER, MSGL_V, "\n");
for (i = 0; i < langcnt; i++) {
if (strcasecmp(languages[i], preferred_language) != 0) continue;
analyser = enca_analyser_alloc(languages[i]);
encoding = enca_analyse_const(analyser, buffer, buflen);
enca_analyser_free(analyser);
if (encoding.charset != ENCA_CS_UNKNOWN) {
detected_sub_cp = enca_charset_name(encoding.charset, ENCA_NAME_STYLE_ICONV);
break;
}
}
free(languages);
if (!detected_sub_cp) {
detected_sub_cp = fallback;
mp_msg(MSGT_SUBREADER, MSGL_INFO, "ENCA detection failed: fallback to %s\n", fallback);
}else{
mp_msg(MSGT_SUBREADER, MSGL_INFO, "ENCA detected charset: %s\n", detected_sub_cp);
}
return detected_sub_cp;
}
#define MAX_GUESS_BUFFER_SIZE (256*1024)
const char* guess_cp(stream_t *st, const char *preferred_language, const char *fallback)
{
size_t buflen;
unsigned char *buffer;
const char *detected_sub_cp = NULL;
buffer = malloc(MAX_GUESS_BUFFER_SIZE);
buflen = stream_read(st,buffer, MAX_GUESS_BUFFER_SIZE);
detected_sub_cp = guess_buffer_cp(buffer, buflen, preferred_language, fallback);
free(buffer);
stream_reset(st);
stream_seek(st,0);
return detected_sub_cp;
}
#undef MAX_GUESS_BUFFER_SIZE
#endif
static int sub_destroy(void *ptr);
sub_data* sub_read_file(char *filename, float fps, struct MPOpts *opts)
{
int utf16;
stream_t* fd;
int n_max, n_first, i, j, sub_first, sub_orig;
subtitle *first, *second, *sub, *return_sub, *alloced_sub = NULL;
sub_data *subt_data;
int uses_time = 0, sub_num = 0, sub_errs = 0;
static const struct subreader sr[]=
{
{ sub_read_line_microdvd, NULL, "microdvd" },
{ sub_read_line_subrip, NULL, "subviewer" },
{ sub_read_line_subviewer, NULL, "subrip" },
{ sub_read_line_sami, NULL, "sami" },
{ sub_read_line_vplayer, NULL, "vplayer" },
{ sub_read_line_rt, NULL, "rt" },
{ sub_read_line_ssa, sub_pp_ssa, "ssa" },
{ sub_read_line_pjs, NULL, "pjs" },
{ sub_read_line_mpsub, NULL, "mpsub" },
{ sub_read_line_aqt, NULL, "aqt" },
{ sub_read_line_subviewer2, NULL, "subviewer 2.0" },
{ sub_read_line_subrip09, NULL, "subrip 0.9" },
{ sub_read_line_jacosub, NULL, "jacosub" },
{ sub_read_line_mpl2, NULL, "mpl2" }
};
const struct subreader *srp;
if(filename==NULL) return NULL; //qnx segfault
fd=open_stream (filename, NULL, NULL); if (!fd) return NULL;
sub_format = SUB_INVALID;
for (utf16 = 0; sub_format == SUB_INVALID && utf16 < 3; utf16++) {
sub_format=sub_autodetect (fd, &uses_time, utf16);
stream_reset(fd);
stream_seek(fd,0);
}
utf16--;
mpsub_multiplier = (uses_time ? 100.0 : 1.0);
if (sub_format==SUB_INVALID) {
mp_msg(MSGT_SUBREADER,MSGL_WARN,"SUB: Could not determine file format\n");
free_stream(fd);
return NULL;
}
srp=sr+sub_format;
mp_msg(MSGT_SUBREADER, MSGL_V, "SUB: Detected subtitle file format: %s\n", srp->name);
#ifdef CONFIG_ICONV
{
int l,k;
k = -1;
if ((l=strlen(filename))>4){
char *exts[] = {".utf", ".utf8", ".utf-8" };
for (k=3;--k>=0;)
if (l >= strlen(exts[k]) && !strcasecmp(filename+(l - strlen(exts[k])), exts[k])){
break;
}
}
if (k<0) subcp_open(fd);
}
#endif
sub_num=0;n_max=32;
first=malloc(n_max*sizeof(subtitle));
if (!first)
abort();
alloced_sub =
sub = malloc(sizeof(subtitle));
//This is to deal with those formats (AQT & Subrip) which define the end of a subtitle
//as the beginning of the following
previous_sub_end = 0;
while(1){
if(sub_num>=n_max){
n_max+=16;
first=realloc(first,n_max*sizeof(subtitle));
}
memset(sub, '\0', sizeof(subtitle));
sub=srp->read(fd, sub, &(struct readline_args){utf16, opts});
if(!sub) break; // EOF
#ifdef CONFIG_ICONV
if (sub!=ERR) sub=subcp_recode(sub);
#endif
if ( sub == ERR )
{
#ifdef CONFIG_ICONV
subcp_close();
#endif
free(first);
free(alloced_sub);
free_stream(fd);
return NULL;
}
// Apply any post processing that needs recoding first
if ((sub!=ERR) && !sub_no_text_pp && srp->post) srp->post(sub);
if(!sub_num || (first[sub_num - 1].start <= sub->start)){
first[sub_num].start = sub->start;
first[sub_num].end = sub->end;
first[sub_num].lines = sub->lines;
first[sub_num].alignment = sub->alignment;
for(i = 0; i < sub->lines; ++i){
first[sub_num].text[i] = sub->text[i];
}
if (previous_sub_end){
first[sub_num - 1].end = previous_sub_end;
previous_sub_end = 0;
}
} else {
for(j = sub_num - 1; j >= 0; --j){
first[j + 1].start = first[j].start;
first[j + 1].end = first[j].end;
first[j + 1].lines = first[j].lines;
first[j + 1].alignment = first[j].alignment;
for(i = 0; i < first[j].lines; ++i){
first[j + 1].text[i] = first[j].text[i];
}
if(!j || (first[j - 1].start <= sub->start)){
first[j].start = sub->start;
first[j].end = sub->end;
first[j].lines = sub->lines;
first[j].alignment = sub->alignment;
for(i = 0; i < SUB_MAX_TEXT; ++i){
first[j].text[i] = sub->text[i];
}
if (previous_sub_end){
first[j].end = first[j - 1].end;
first[j - 1].end = previous_sub_end;
previous_sub_end = 0;
}
break;
}
}
}
if(sub==ERR) ++sub_errs; else ++sub_num; // Error vs. Valid
}
free_stream(fd);
#ifdef CONFIG_ICONV
subcp_close();
#endif
free(alloced_sub);
// printf ("SUB: Subtitle format %s time.\n", uses_time?"uses":"doesn't use");
mp_msg(MSGT_SUBREADER, MSGL_V,"SUB: Read %i subtitles, %i bad line(s).\n",
sub_num, sub_errs);
if(sub_num<=0){
free(first);
return NULL;
}
// we do overlap if the user forced it (suboverlap_enable == 2) or
// the user didn't forced no-overlapsub and the format is Jacosub or Ssa.
// this is because usually overlapping subtitles are found in these formats,
// while in others they are probably result of bad timing
if ((suboverlap_enabled == 2) ||
((suboverlap_enabled) && ((sub_format == SUB_JACOSUB) || (sub_format == SUB_SSA)))) {
adjust_subs_time(first, 6.0, fps, 0, sub_num, uses_time);/*~6 secs AST*/
// here we manage overlapping subtitles
sub_orig = sub_num;
n_first = sub_num;
sub_num = 0;
second = NULL;
// for each subtitle in first[] we deal with its 'block' of
// bonded subtitles
for (sub_first = 0; sub_first < n_first; ++sub_first) {
unsigned long global_start = first[sub_first].start,
global_end = first[sub_first].end, local_start, local_end;
int lines_to_add = first[sub_first].lines, sub_to_add = 0,
**placeholder = NULL, higher_line = 0, counter, start_block_sub = sub_num;
char real_block = 1;
// here we find the number of subtitles inside the 'block'
// and its span interval. this works well only with sorted
// subtitles
while ((sub_first + sub_to_add + 1 < n_first) && (first[sub_first + sub_to_add + 1].start < global_end)) {
++sub_to_add;
lines_to_add += first[sub_first + sub_to_add].lines;
if (first[sub_first + sub_to_add].start < global_start) {
global_start = first[sub_first + sub_to_add].start;
}
if (first[sub_first + sub_to_add].end > global_end) {
global_end = first[sub_first + sub_to_add].end;
}
}
/* Avoid n^2 memory use for the "placeholder" data structure
* below with subtitles that have a huge number of
* consecutive overlapping lines. */
lines_to_add = FFMIN(lines_to_add, SUB_MAX_TEXT);
// we need a structure to keep trace of the screen lines
// used by the subs, a 'placeholder'
counter = 2 * sub_to_add + 1; // the maximum number of subs derived
// from a block of sub_to_add+1 subs
placeholder = malloc(sizeof(int *) * counter);
for (i = 0; i < counter; ++i) {
placeholder[i] = malloc(sizeof(int) * lines_to_add);
for (j = 0; j < lines_to_add; ++j) {
placeholder[i][j] = -1;
}
}
counter = 0;
local_end = global_start - 1;
do {
int ls;
// here we find the beginning and the end of a new
// subtitle in the block
local_start = local_end + 1;
local_end = global_end;
for (j = 0; j <= sub_to_add; ++j) {
if ((first[sub_first + j].start - 1 > local_start) && (first[sub_first + j].start - 1 < local_end)) {
local_end = first[sub_first + j].start - 1;
} else if ((first[sub_first + j].end > local_start) && (first[sub_first + j].end < local_end)) {
local_end = first[sub_first + j].end;
}
}
// here we allocate the screen lines to subs we must
// display in current local_start-local_end interval.
// if the subs were yet presents in the previous interval
// they keep the same lines, otherside they get unused lines
for (j = 0; j <= sub_to_add; ++j) {
if ((first[sub_first + j].start <= local_end) && (first[sub_first + j].end > local_start)) {
unsigned long sub_lines = first[sub_first + j].lines, fragment_length = lines_to_add + 1,
tmp = 0;
char boolean = 0;
int fragment_position = -1;
// if this is not the first new sub of the block
// we find if this sub was present in the previous
// new sub
if (counter)
for (i = 0; i < lines_to_add; ++i) {
if (placeholder[counter - 1][i] == sub_first + j) {
placeholder[counter][i] = sub_first + j;
boolean = 1;
}
}
if (boolean)
continue;
// we are looking for the shortest among all groups of
// sequential blank lines whose length is greater than or
// equal to sub_lines. we store in fragment_position the
// position of the shortest group, in fragment_length its
// length, and in tmp the length of the group currently
// examinated
for (i = 0; i < lines_to_add; ++i) {
if (placeholder[counter][i] == -1) {
// placeholder[counter][i] is part of the current group
// of blank lines
++tmp;
} else {
if (tmp == sub_lines) {
// current group's size fits exactly the one we
// need, so we stop looking
fragment_position = i - tmp;
tmp = 0;
break;
}
if ((tmp) && (tmp > sub_lines) && (tmp < fragment_length)) {
// current group is the best we found till here,
// but is still bigger than the one we are looking
// for, so we keep on looking
fragment_length = tmp;
fragment_position = i - tmp;
tmp = 0;
} else {
// current group doesn't fit at all, so we forget it
tmp = 0;
}
}
}
if (tmp) {
// last screen line is blank, a group ends with it
if ((tmp >= sub_lines) && (tmp < fragment_length)) {
fragment_position = i - tmp;
}
}
if (fragment_position == -1) {
// it was not possible to find free screen line(s) for a subtitle,
// usually this means a bug in the code; however we do not overlap
mp_msg(MSGT_SUBREADER, MSGL_WARN, "SUB: we could not find a suitable position for an overlapping subtitle\n");
higher_line = SUB_MAX_TEXT + 1;
break;
} else {
for (tmp = 0; tmp < sub_lines; ++tmp) {
placeholder[counter][fragment_position + tmp] = sub_first + j;
}
}
}
}
for (j = higher_line + 1; j < lines_to_add; ++j) {
if (placeholder[counter][j] != -1)
higher_line = j;
else
break;
}
if (higher_line >= SUB_MAX_TEXT) {
// the 'block' has too much lines, so we don't overlap the
// subtitles
second = realloc(second, (sub_num + sub_to_add + 1) * sizeof(subtitle));
for (j = 0; j <= sub_to_add; ++j) {
int ls;
memset(&second[sub_num + j], '\0', sizeof(subtitle));
second[sub_num + j].start = first[sub_first + j].start;
second[sub_num + j].end = first[sub_first + j].end;
second[sub_num + j].lines = first[sub_first + j].lines;
second[sub_num + j].alignment = first[sub_first + j].alignment;
for (ls = 0; ls < second[sub_num + j].lines; ls++) {
second[sub_num + j].text[ls] = strdup(first[sub_first + j].text[ls]);
}
}
sub_num += sub_to_add + 1;
sub_first += sub_to_add;
real_block = 0;
break;
}
// we read the placeholder structure and create the new
// subs.
second = realloc(second, (sub_num + 1) * sizeof(subtitle));
memset(&second[sub_num], '\0', sizeof(subtitle));
second[sub_num].start = local_start;
second[sub_num].end = local_end;
second[sub_num].alignment = first[sub_first].alignment;
n_max = (lines_to_add < SUB_MAX_TEXT) ? lines_to_add : SUB_MAX_TEXT;
for (i = 0, j = 0; j < n_max; ++j) {
if (placeholder[counter][j] != -1) {
int lines = first[placeholder[counter][j]].lines;
for (ls = 0; ls < lines; ++ls) {
second[sub_num].text[i++] = strdup(first[placeholder[counter][j]].text[ls]);
}
j += lines - 1;
} else {
second[sub_num].text[i++] = strdup(" ");
}
}
++sub_num;
++counter;
} while (local_end < global_end);
if (real_block)
for (i = 0; i < counter; ++i)
second[start_block_sub + i].lines = higher_line + 1;
counter = 2 * sub_to_add + 1;
for (i = 0; i < counter; ++i) {
free(placeholder[i]);
}
free(placeholder);
sub_first += sub_to_add;
}
for (j = sub_orig - 1; j >= 0; --j) {
for (i = first[j].lines - 1; i >= 0; --i) {
free(first[j].text[i]);
}
}
free(first);
return_sub = second;
} else { //if(suboverlap_enabled)
adjust_subs_time(first, 6.0, fps, 1, sub_num, uses_time);/*~6 secs AST*/
return_sub = first;
}
if (return_sub == NULL) return NULL;
subt_data = talloc_zero(NULL, sub_data);
talloc_set_destructor(subt_data, sub_destroy);
subt_data->codec = srp->name;
subt_data->filename = strdup(filename);
subt_data->sub_uses_time = uses_time;
subt_data->sub_num = sub_num;
subt_data->sub_errs = sub_errs;
subt_data->subtitles = return_sub;
return subt_data;
}
static int sub_destroy(void *ptr)
{
sub_data *subd = ptr;
int i, j;
for (i = 0; i < subd->sub_num; i++)
for (j = 0; j < subd->subtitles[i].lines; j++)
free( subd->subtitles[i].text[j] );
free( subd->subtitles );
free( subd->filename );
return 0;
}
#define MAX_SUBLINE 512
/**
* \brief parse text and append it to subtitle in sub
* \param sub subtitle struct to add text to
* \param txt text to parse
* \param len length of text in txt
* \param endpts pts at which this subtitle text should be removed again
*
* <> and {} are interpreted as comment delimiters, "\n", "\N", '\n', '\r'
* and '\0' are interpreted as newlines, duplicate, leading and trailing
* newlines are ignored.
*/
void sub_add_text(subtitle *sub, const char *txt, int len, double endpts) {
int comment = 0;
int double_newline = 1; // ignore newlines at the beginning
int i, pos;
char *buf;
if (sub->lines >= SUB_MAX_TEXT) return;
pos = 0;
buf = malloc(MAX_SUBLINE + 1);
sub->text[sub->lines] = buf;
sub->endpts[sub->lines] = endpts;
for (i = 0; i < len && pos < MAX_SUBLINE; i++) {
char c = txt[i];
if (c == '<') comment |= 1;
if (c == '{') comment |= 2;
if (comment) {
if (c == '}') comment &= ~2;
if (c == '>') comment &= ~1;
continue;
}
if (pos == MAX_SUBLINE - 1) {
i--;
c = 0;
}
if (c == '\\' && i + 1 < len) {
c = txt[++i];
if (c == 'n' || c == 'N') c = 0;
}
if (c == '\n' || c == '\r') c = 0;
if (c) {
double_newline = 0;
buf[pos++] = c;
} else if (!double_newline) {
if (sub->lines >= SUB_MAX_TEXT - 1) {
mp_msg(MSGT_VO, MSGL_WARN, "Too many subtitle lines\n");
break;
}
double_newline = 1;
buf[pos] = 0;
sub->lines++;
pos = 0;
buf = malloc(MAX_SUBLINE + 1);
sub->text[sub->lines] = buf;
sub->endpts[sub->lines] = endpts;
}
}
buf[pos] = 0;
if (sub->lines < SUB_MAX_TEXT &&
strlen(sub->text[sub->lines]))
sub->lines++;
if (sub->lines > 1 &&
strcmp(sub->text[sub->lines-1], sub->text[sub->lines-2]) == 0) {
// remove duplicate lines. These can happen with some
// "clever" ASS effects.
sub->lines--;
sub->endpts[sub->lines-1] =
FFMAX(sub->endpts[sub->lines-1],
sub->endpts[sub->lines]);
free(sub->text[sub->lines]);
}
}
/**
* \brief remove outdated subtitle lines.
* \param sub subtitle struct to modify
* \param pts current pts. All lines with endpts <= this will be removed.
* Use MP_NOPTS_VALUE to remove all lines
* \return 1 if sub was modified, 0 otherwise.
*/
int sub_clear_text(subtitle *sub, double pts) {
int i = 0;
int changed = 0;
while (i < sub->lines) {
double endpts = sub->endpts[i];
if (pts == MP_NOPTS_VALUE || (endpts != MP_NOPTS_VALUE && pts >= endpts)) {
int j;
free(sub->text[i]);
for (j = i + 1; j < sub->lines; j++) {
sub->text[j - 1] = sub->text[j];
sub->endpts[j - 1] = sub->endpts[j];
}
sub->lines--;
changed = 1;
} else
i++;
}
return changed;
}
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