208 lines
6.8 KiB
C
208 lines
6.8 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2012 Clément Bœsch
|
||
|
|
*
|
||
|
|
* This file is part of FFmpeg.
|
||
|
|
*
|
||
|
|
* FFmpeg is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU Lesser General Public
|
||
|
|
* License as published by the Free Software Foundation; either
|
||
|
|
* version 2.1 of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* FFmpeg 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
|
||
|
|
* Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
|
* License along with FFmpeg; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @file
|
||
|
|
* JACOsub subtitle decoder
|
||
|
|
* @see http://unicorn.us.com/jacosub/jscripts.html
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <time.h>
|
||
|
|
#include "ass.h"
|
||
|
|
#include "jacosub.h"
|
||
|
|
#include "libavutil/avstring.h"
|
||
|
|
#include "libavutil/bprint.h"
|
||
|
|
|
||
|
|
#undef time
|
||
|
|
|
||
|
|
static int insert_text(AVBPrint *dst, const char *in, const char *arg)
|
||
|
|
{
|
||
|
|
av_bprintf(dst, "%s", arg);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int insert_datetime(AVBPrint *dst, const char *in, const char *arg)
|
||
|
|
{
|
||
|
|
char buf[16] = {0};
|
||
|
|
time_t now = time(0);
|
||
|
|
struct tm ltime;
|
||
|
|
|
||
|
|
#if HAVE_LOCALTIME_R
|
||
|
|
localtime_r(&now, <ime);
|
||
|
|
#else
|
||
|
|
ltime = *localtime(&now);
|
||
|
|
#endif
|
||
|
|
strftime(buf, sizeof(buf), arg, <ime);
|
||
|
|
av_bprintf(dst, "%s", buf);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int insert_color(AVBPrint *dst, const char *in, const char *arg)
|
||
|
|
{
|
||
|
|
return 1; // skip id
|
||
|
|
}
|
||
|
|
|
||
|
|
static int insert_font(AVBPrint *dst, const char *in, const char *arg)
|
||
|
|
{
|
||
|
|
return 1; // skip id
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct {
|
||
|
|
const char *from;
|
||
|
|
const char *arg;
|
||
|
|
int (*func)(AVBPrint *dst, const char *in, const char *arg);
|
||
|
|
} ass_codes_map[] = {
|
||
|
|
{"\\~", "~", insert_text}, // tilde doesn't need escaping
|
||
|
|
{"~", "{\\h}", insert_text}, // hard space
|
||
|
|
{"\\n", "\\N", insert_text}, // newline
|
||
|
|
{"\\D", "%d %b %Y", insert_datetime}, // current date
|
||
|
|
{"\\T", "%H:%M", insert_datetime}, // current time
|
||
|
|
{"\\N", "{\\r}", insert_text}, // reset to default style
|
||
|
|
{"\\I", "{\\i1}", insert_text}, // italic on
|
||
|
|
{"\\i", "{\\i0}", insert_text}, // italic off
|
||
|
|
{"\\B", "{\\b1}", insert_text}, // bold on
|
||
|
|
{"\\b", "{\\b0}", insert_text}, // bold off
|
||
|
|
{"\\U", "{\\u1}", insert_text}, // underline on
|
||
|
|
{"\\u", "{\\u0}", insert_text}, // underline off
|
||
|
|
{"\\C", "", insert_color}, // TODO: color
|
||
|
|
{"\\F", "", insert_font}, // TODO: font
|
||
|
|
};
|
||
|
|
|
||
|
|
enum {
|
||
|
|
ALIGN_VB = 1<<0, // vertical bottom, default
|
||
|
|
ALIGN_VM = 1<<1, // vertical middle
|
||
|
|
ALIGN_VT = 1<<2, // vertical top
|
||
|
|
ALIGN_JC = 1<<3, // justify center, default
|
||
|
|
ALIGN_JL = 1<<4, // justify left
|
||
|
|
ALIGN_JR = 1<<5, // justify right
|
||
|
|
};
|
||
|
|
|
||
|
|
static void jacosub_to_ass(AVCodecContext *avctx, AVBPrint *dst, const char *src)
|
||
|
|
{
|
||
|
|
int i, valign = 0, halign = 0;
|
||
|
|
char c = av_toupper(*src);
|
||
|
|
char directives[128] = {0};
|
||
|
|
|
||
|
|
/* extract the optional directives */
|
||
|
|
if ((c >= 'A' && c <= 'Z') || c == '[') {
|
||
|
|
char *p = directives;
|
||
|
|
char *pend = directives + sizeof(directives) - 1;
|
||
|
|
|
||
|
|
do *p++ = av_toupper(*src++);
|
||
|
|
while (*src && !jss_whitespace(*src) && p < pend);
|
||
|
|
*p = 0;
|
||
|
|
src = jss_skip_whitespace(src);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* handle directives (TODO: handle more of them, and more reliably) */
|
||
|
|
if (strstr(directives, "VB")) valign = ALIGN_VB;
|
||
|
|
else if (strstr(directives, "VM")) valign = ALIGN_VM;
|
||
|
|
else if (strstr(directives, "VT")) valign = ALIGN_VT;
|
||
|
|
if (strstr(directives, "JC")) halign = ALIGN_JC;
|
||
|
|
else if (strstr(directives, "JL")) halign = ALIGN_JL;
|
||
|
|
else if (strstr(directives, "JR")) halign = ALIGN_JR;
|
||
|
|
if (valign || halign) {
|
||
|
|
if (!valign) valign = ALIGN_VB;
|
||
|
|
if (!halign) halign = ALIGN_JC;
|
||
|
|
switch (valign | halign) {
|
||
|
|
case ALIGN_VB | ALIGN_JL: av_bprintf(dst, "{\\an1}"); break; // bottom left
|
||
|
|
case ALIGN_VB | ALIGN_JC: av_bprintf(dst, "{\\an2}"); break; // bottom center
|
||
|
|
case ALIGN_VB | ALIGN_JR: av_bprintf(dst, "{\\an3}"); break; // bottom right
|
||
|
|
case ALIGN_VM | ALIGN_JL: av_bprintf(dst, "{\\an4}"); break; // middle left
|
||
|
|
case ALIGN_VM | ALIGN_JC: av_bprintf(dst, "{\\an5}"); break; // middle center
|
||
|
|
case ALIGN_VM | ALIGN_JR: av_bprintf(dst, "{\\an6}"); break; // middle right
|
||
|
|
case ALIGN_VT | ALIGN_JL: av_bprintf(dst, "{\\an7}"); break; // top left
|
||
|
|
case ALIGN_VT | ALIGN_JC: av_bprintf(dst, "{\\an8}"); break; // top center
|
||
|
|
case ALIGN_VT | ALIGN_JR: av_bprintf(dst, "{\\an9}"); break; // top right
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* process timed line */
|
||
|
|
while (*src && *src != '\n') {
|
||
|
|
|
||
|
|
/* text continue on the next line */
|
||
|
|
if (src[0] == '\\' && src[1] == '\n') {
|
||
|
|
src += 2;
|
||
|
|
while (jss_whitespace(*src))
|
||
|
|
src++;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* special character codes */
|
||
|
|
for (i = 0; i < FF_ARRAY_ELEMS(ass_codes_map); i++) {
|
||
|
|
const char *from = ass_codes_map[i].from;
|
||
|
|
const char *arg = ass_codes_map[i].arg;
|
||
|
|
size_t codemap_len = strlen(from);
|
||
|
|
|
||
|
|
if (!strncmp(src, from, codemap_len)) {
|
||
|
|
src += codemap_len;
|
||
|
|
src += ass_codes_map[i].func(dst, src, arg);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* simple char copy */
|
||
|
|
if (i == FF_ARRAY_ELEMS(ass_codes_map))
|
||
|
|
av_bprintf(dst, "%c", *src++);
|
||
|
|
}
|
||
|
|
av_bprintf(dst, "\r\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
static int jacosub_decode_frame(AVCodecContext *avctx,
|
||
|
|
void *data, int *got_sub_ptr, AVPacket *avpkt)
|
||
|
|
{
|
||
|
|
AVSubtitle *sub = data;
|
||
|
|
const char *ptr = avpkt->data;
|
||
|
|
|
||
|
|
if (avpkt->size <= 0)
|
||
|
|
goto end;
|
||
|
|
|
||
|
|
if (*ptr) {
|
||
|
|
int ts_start = avpkt->pts;
|
||
|
|
int ts_end = avpkt->pts + avpkt->duration;
|
||
|
|
AVBPrint buffer;
|
||
|
|
char *dec_sub;
|
||
|
|
|
||
|
|
// skip timers
|
||
|
|
ptr = jss_skip_whitespace(ptr);
|
||
|
|
ptr = strchr(ptr, ' '); if (!ptr) goto end; ptr++;
|
||
|
|
ptr = strchr(ptr, ' '); if (!ptr) goto end; ptr++;
|
||
|
|
|
||
|
|
av_bprint_init(&buffer, JSS_MAX_LINESIZE, JSS_MAX_LINESIZE);
|
||
|
|
jacosub_to_ass(avctx, &buffer, ptr);
|
||
|
|
av_bprint_finalize(&buffer, &dec_sub);
|
||
|
|
ff_ass_add_rect(sub, dec_sub, ts_start, ts_end, 0);
|
||
|
|
av_free(dec_sub);
|
||
|
|
}
|
||
|
|
|
||
|
|
end:
|
||
|
|
*got_sub_ptr = sub->num_rects > 0;
|
||
|
|
return avpkt->size;
|
||
|
|
}
|
||
|
|
|
||
|
|
AVCodec ff_jacosub_decoder = {
|
||
|
|
.name = "jacosub",
|
||
|
|
.long_name = NULL_IF_CONFIG_SMALL("JACOsub subtitle"),
|
||
|
|
.type = AVMEDIA_TYPE_SUBTITLE,
|
||
|
|
.id = CODEC_ID_JACOSUB,
|
||
|
|
.init = ff_ass_subtitle_header_default,
|
||
|
|
.decode = jacosub_decode_frame,
|
||
|
|
};
|