mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-12-05 01:56:41 +00:00
168 lines
6.3 KiB
C
168 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 border_style, int alignment)
|
|
{
|
|
avctx->subtitle_header = av_asprintf(
|
|
"[Script Info]\r\n"
|
|
"; Script generated by FFmpeg/Lavc%s\r\n"
|
|
"ScriptType: v4.00+\r\n"
|
|
"PlayResX: %d\r\n"
|
|
"PlayResY: %d\r\n"
|
|
"\r\n"
|
|
"[V4+ Styles]\r\n"
|
|
|
|
/* ASSv4 header */
|
|
"Format: Name, "
|
|
"Fontname, Fontsize, "
|
|
"PrimaryColour, SecondaryColour, OutlineColour, BackColour, "
|
|
"Bold, Italic, Underline, StrikeOut, "
|
|
"ScaleX, ScaleY, "
|
|
"Spacing, Angle, "
|
|
"BorderStyle, Outline, Shadow, "
|
|
"Alignment, MarginL, MarginR, MarginV, "
|
|
"Encoding\r\n"
|
|
|
|
"Style: "
|
|
"Default," /* Name */
|
|
"%s,%d," /* Font{name,size} */
|
|
"&H%x,&H%x,&H%x,&H%x," /* {Primary,Secondary,Outline,Back}Colour */
|
|
"%d,%d,%d,0," /* Bold, Italic, Underline, StrikeOut */
|
|
"100,100," /* Scale{X,Y} */
|
|
"0,0," /* Spacing, Angle */
|
|
"%d,1,0," /* BorderStyle, Outline, Shadow */
|
|
"%d,10,10,10," /* Alignment, Margin[LRV] */
|
|
"0\r\n" /* Encoding */
|
|
|
|
"\r\n"
|
|
"[Events]\r\n"
|
|
"Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text\r\n",
|
|
!(avctx->flags & AV_CODEC_FLAG_BITEXACT) ? AV_STRINGIFY(LIBAVCODEC_VERSION) : "",
|
|
ASS_DEFAULT_PLAYRESX, ASS_DEFAULT_PLAYRESY,
|
|
font, font_size, color, color, back_color, back_color,
|
|
-bold, -italic, -underline, border_style, 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_BORDERSTYLE,
|
|
ASS_DEFAULT_ALIGNMENT);
|
|
}
|
|
|
|
char *ff_ass_get_dialog(int readorder, int layer, const char *style,
|
|
const char *speaker, const char *text)
|
|
{
|
|
return av_asprintf("%d,%d,%s,%s,0,0,0,,%s",
|
|
readorder, layer, style ? style : "Default",
|
|
speaker ? speaker : "", text);
|
|
}
|
|
|
|
int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
|
|
int readorder, int layer, const char *style,
|
|
const char *speaker)
|
|
{
|
|
char *ass_str;
|
|
AVSubtitleRect **rects;
|
|
|
|
rects = av_realloc_array(sub->rects, (sub->num_rects+1), sizeof(*sub->rects));
|
|
if (!rects)
|
|
return AVERROR(ENOMEM);
|
|
sub->rects = rects;
|
|
rects[sub->num_rects] = av_mallocz(sizeof(*rects[0]));
|
|
if (!rects[sub->num_rects])
|
|
return AVERROR(ENOMEM);
|
|
rects[sub->num_rects]->type = SUBTITLE_ASS;
|
|
ass_str = ff_ass_get_dialog(readorder, layer, style, speaker, dialog);
|
|
if (!ass_str)
|
|
return AVERROR(ENOMEM);
|
|
rects[sub->num_rects]->ass = ass_str;
|
|
sub->num_rects++;
|
|
return 0;
|
|
}
|
|
|
|
void ff_ass_decoder_flush(AVCodecContext *avctx)
|
|
{
|
|
FFASSDecoderContext *s = avctx->priv_data;
|
|
if (!(avctx->flags2 & AV_CODEC_FLAG2_RO_FLUSH_NOOP))
|
|
s->readorder = 0;
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
}
|