mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-09-09 01:07:01 +02:00
190 lines
6.3 KiB
C
190 lines
6.3 KiB
C
/*
|
|
* SSA/ASS common functions
|
|
* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
#include "ass.h"
|
|
#include "libavutil/avassert.h"
|
|
#include "libavutil/avstring.h"
|
|
#include "libavutil/bprint.h"
|
|
#include "libavutil/common.h"
|
|
|
|
int ff_ass_subtitle_header(AVCodecContext *avctx,
|
|
const char *font, int font_size,
|
|
int color, int back_color,
|
|
int bold, int italic, int underline,
|
|
int alignment)
|
|
{
|
|
avctx->subtitle_header = av_asprintf(
|
|
"[Script Info]\r\n"
|
|
"ScriptType: v4.00+\r\n"
|
|
"\r\n"
|
|
"[V4+ Styles]\r\n"
|
|
"Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding\r\n"
|
|
"Style: Default,%s,%d,&H%x,&H%x,&H%x,&H%x,%d,%d,%d,1,1,0,%d,10,10,10,0,0\r\n"
|
|
"\r\n"
|
|
"[Events]\r\n"
|
|
"Format: Layer, Start, End, Style, Text\r\n",
|
|
font, font_size, color, color, back_color, back_color,
|
|
-bold, -italic, -underline, alignment);
|
|
|
|
if (!avctx->subtitle_header)
|
|
return AVERROR(ENOMEM);
|
|
avctx->subtitle_header_size = strlen(avctx->subtitle_header);
|
|
return 0;
|
|
}
|
|
|
|
int ff_ass_subtitle_header_default(AVCodecContext *avctx)
|
|
{
|
|
return ff_ass_subtitle_header(avctx, ASS_DEFAULT_FONT,
|
|
ASS_DEFAULT_FONT_SIZE,
|
|
ASS_DEFAULT_COLOR,
|
|
ASS_DEFAULT_BACK_COLOR,
|
|
ASS_DEFAULT_BOLD,
|
|
ASS_DEFAULT_ITALIC,
|
|
ASS_DEFAULT_UNDERLINE,
|
|
ASS_DEFAULT_ALIGNMENT);
|
|
}
|
|
|
|
static void insert_ts(AVBPrint *buf, int ts)
|
|
{
|
|
if (ts == -1) {
|
|
av_bprintf(buf, "9:59:59.99,");
|
|
} else {
|
|
int h, m, s;
|
|
|
|
h = ts/360000; ts -= 360000*h;
|
|
m = ts/ 6000; ts -= 6000*m;
|
|
s = ts/ 100; ts -= 100*s;
|
|
av_bprintf(buf, "%d:%02d:%02d.%02d,", h, m, s, ts);
|
|
}
|
|
}
|
|
|
|
int ff_ass_bprint_dialog(AVBPrint *buf, const char *dialog,
|
|
int ts_start, int duration, int raw)
|
|
{
|
|
int dlen;
|
|
|
|
if (!raw || raw == 2) {
|
|
long int layer = 0;
|
|
|
|
if (raw == 2) {
|
|
/* skip ReadOrder */
|
|
dialog = strchr(dialog, ',');
|
|
if (!dialog)
|
|
return AVERROR_INVALIDDATA;
|
|
dialog++;
|
|
|
|
/* extract Layer or Marked */
|
|
layer = strtol(dialog, (char**)&dialog, 10);
|
|
if (*dialog != ',')
|
|
return AVERROR_INVALIDDATA;
|
|
dialog++;
|
|
}
|
|
av_bprintf(buf, "Dialogue: %ld,", layer);
|
|
insert_ts(buf, ts_start);
|
|
insert_ts(buf, duration == -1 ? -1 : ts_start + duration);
|
|
if (raw != 2)
|
|
av_bprintf(buf, "Default,");
|
|
}
|
|
|
|
dlen = strcspn(dialog, "\n");
|
|
dlen += dialog[dlen] == '\n';
|
|
|
|
av_bprintf(buf, "%.*s", dlen, dialog);
|
|
if (raw == 2)
|
|
av_bprintf(buf, "\r\n");
|
|
|
|
return dlen;
|
|
}
|
|
|
|
int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
|
|
int ts_start, int duration, int raw)
|
|
{
|
|
AVBPrint buf;
|
|
int ret, dlen;
|
|
AVSubtitleRect **rects;
|
|
|
|
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
|
|
if ((ret = ff_ass_bprint_dialog(&buf, dialog, ts_start, duration, raw)) < 0)
|
|
goto err;
|
|
dlen = ret;
|
|
if (!av_bprint_is_complete(&buf))
|
|
goto errnomem;
|
|
|
|
rects = av_realloc(sub->rects, (sub->num_rects+1) * sizeof(*sub->rects));
|
|
if (!rects)
|
|
goto errnomem;
|
|
sub->rects = rects;
|
|
sub->end_display_time = FFMAX(sub->end_display_time, 10 * duration);
|
|
rects[sub->num_rects] = av_mallocz(sizeof(*rects[0]));
|
|
rects[sub->num_rects]->type = SUBTITLE_ASS;
|
|
ret = av_bprint_finalize(&buf, &rects[sub->num_rects]->ass);
|
|
if (ret < 0)
|
|
goto err;
|
|
sub->num_rects++;
|
|
return dlen;
|
|
|
|
errnomem:
|
|
ret = AVERROR(ENOMEM);
|
|
err:
|
|
av_bprint_finalize(&buf, NULL);
|
|
return ret;
|
|
}
|
|
|
|
void ff_ass_bprint_text_event(AVBPrint *buf, const char *p, int size,
|
|
const char *linebreaks, int keep_ass_markup)
|
|
{
|
|
const char *p_end = p + size;
|
|
|
|
for (; p < p_end && *p; p++) {
|
|
|
|
/* forced custom line breaks, not accounted as "normal" EOL */
|
|
if (linebreaks && strchr(linebreaks, *p)) {
|
|
av_bprintf(buf, "\\N");
|
|
|
|
/* standard ASS escaping so random characters don't get mis-interpreted
|
|
* as ASS */
|
|
} else if (!keep_ass_markup && strchr("{}\\", *p)) {
|
|
av_bprintf(buf, "\\%c", *p);
|
|
|
|
/* some packets might end abruptly (no \0 at the end, like for example
|
|
* in some cases of demuxing from a classic video container), some
|
|
* might be terminated with \n or \r\n which we have to remove (for
|
|
* consistency with those who haven't), and we also have to deal with
|
|
* evil cases such as \r at the end of the buffer (and no \0 terminated
|
|
* character) */
|
|
} else if (p[0] == '\n') {
|
|
/* some stuff left so we can insert a line break */
|
|
if (p < p_end - 1)
|
|
av_bprintf(buf, "\\N");
|
|
} else if (p[0] == '\r' && p < p_end - 1 && p[1] == '\n') {
|
|
/* \r followed by a \n, we can skip it. We don't insert the \N yet
|
|
* because we don't know if it is followed by more text */
|
|
continue;
|
|
|
|
/* finally, a sane character */
|
|
} else {
|
|
av_bprint_chars(buf, *p, 1);
|
|
}
|
|
}
|
|
av_bprintf(buf, "\r\n");
|
|
}
|