2010-12-28 23:52:53 +00:00
|
|
|
/*
|
|
|
|
* SubRip subtitle decoder
|
|
|
|
* 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 "libavutil/avstring.h"
|
2012-08-06 13:49:32 +00:00
|
|
|
#include "libavutil/common.h"
|
2012-10-24 22:01:42 +00:00
|
|
|
#include "libavutil/intreadwrite.h"
|
2011-02-07 13:37:08 +00:00
|
|
|
#include "libavutil/parseutils.h"
|
2010-12-28 23:52:53 +00:00
|
|
|
#include "avcodec.h"
|
|
|
|
#include "ass.h"
|
|
|
|
|
|
|
|
static int html_color_parse(AVCodecContext *avctx, const char *str)
|
|
|
|
{
|
|
|
|
uint8_t rgba[4];
|
|
|
|
if (av_parse_color(rgba, str, strcspn(str, "\" >"), avctx) < 0)
|
|
|
|
return -1;
|
|
|
|
return rgba[0] | rgba[1] << 8 | rgba[2] << 16;
|
|
|
|
}
|
|
|
|
|
|
|
|
enum {
|
|
|
|
PARAM_UNKNOWN = -1,
|
|
|
|
PARAM_SIZE,
|
|
|
|
PARAM_COLOR,
|
|
|
|
PARAM_FACE,
|
|
|
|
PARAM_NUMBER
|
|
|
|
};
|
|
|
|
|
|
|
|
typedef struct {
|
|
|
|
char tag[128];
|
|
|
|
char param[PARAM_NUMBER][128];
|
|
|
|
} SrtStack;
|
|
|
|
|
2014-09-28 09:57:46 +00:00
|
|
|
static void rstrip_spaces_buf(AVBPrint *buf)
|
|
|
|
{
|
|
|
|
while (buf->len > 0 && buf->str[buf->len - 1] == ' ')
|
|
|
|
buf->str[--buf->len] = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void srt_to_ass(AVCodecContext *avctx, AVBPrint *dst,
|
|
|
|
const char *in, int x1, int y1, int x2, int y2)
|
2010-12-28 23:52:53 +00:00
|
|
|
{
|
2012-12-29 22:50:08 +00:00
|
|
|
char *param, buffer[128], tmp[128];
|
2010-12-28 23:52:53 +00:00
|
|
|
int len, tag_close, sptr = 1, line_start = 1, an = 0, end = 0;
|
|
|
|
SrtStack stack[16];
|
|
|
|
|
|
|
|
stack[0].tag[0] = 0;
|
|
|
|
strcpy(stack[0].param[PARAM_SIZE], "{\\fs}");
|
|
|
|
strcpy(stack[0].param[PARAM_COLOR], "{\\c}");
|
|
|
|
strcpy(stack[0].param[PARAM_FACE], "{\\fn}");
|
|
|
|
|
|
|
|
if (x1 >= 0 && y1 >= 0) {
|
|
|
|
if (x2 >= 0 && y2 >= 0 && (x2 != x1 || y2 != y1))
|
2014-09-28 09:57:46 +00:00
|
|
|
av_bprintf(dst, "{\\an1}{\\move(%d,%d,%d,%d)}", x1, y1, x2, y2);
|
2010-12-28 23:52:53 +00:00
|
|
|
else
|
2014-09-28 09:57:46 +00:00
|
|
|
av_bprintf(dst, "{\\an1}{\\pos(%d,%d)}", x1, y1);
|
2010-12-28 23:52:53 +00:00
|
|
|
}
|
|
|
|
|
2014-09-28 09:57:46 +00:00
|
|
|
for (; !end && *in; in++) {
|
2010-12-28 23:52:53 +00:00
|
|
|
switch (*in) {
|
|
|
|
case '\r':
|
|
|
|
break;
|
|
|
|
case '\n':
|
|
|
|
if (line_start) {
|
|
|
|
end = 1;
|
|
|
|
break;
|
|
|
|
}
|
2014-09-28 09:57:46 +00:00
|
|
|
rstrip_spaces_buf(dst);
|
|
|
|
av_bprintf(dst, "\\N");
|
2010-12-28 23:52:53 +00:00
|
|
|
line_start = 1;
|
|
|
|
break;
|
|
|
|
case ' ':
|
|
|
|
if (!line_start)
|
2014-09-28 09:57:46 +00:00
|
|
|
av_bprint_chars(dst, *in, 1);
|
2010-12-28 23:52:53 +00:00
|
|
|
break;
|
|
|
|
case '{': /* skip all {\xxx} substrings except for {\an%d}
|
|
|
|
and all microdvd like styles such as {Y:xxx} */
|
2012-12-29 22:50:08 +00:00
|
|
|
len = 0;
|
|
|
|
an += sscanf(in, "{\\an%*1u}%n", &len) >= 0 && len > 0;
|
|
|
|
if ((an != 1 && (len = 0, sscanf(in, "{\\%*[^}]}%n", &len) >= 0 && len > 0)) ||
|
|
|
|
(len = 0, sscanf(in, "{%*1[CcFfoPSsYy]:%*[^}]}%n", &len) >= 0 && len > 0)) {
|
2010-12-28 23:52:53 +00:00
|
|
|
in += len - 1;
|
|
|
|
} else
|
2014-09-28 09:57:46 +00:00
|
|
|
av_bprint_chars(dst, *in, 1);
|
2010-12-28 23:52:53 +00:00
|
|
|
break;
|
|
|
|
case '<':
|
|
|
|
tag_close = in[1] == '/';
|
2012-12-29 22:50:08 +00:00
|
|
|
len = 0;
|
|
|
|
if (sscanf(in+tag_close+1, "%127[^>]>%n", buffer, &len) >= 1 && len > 0) {
|
2010-12-28 23:52:53 +00:00
|
|
|
if ((param = strchr(buffer, ' ')))
|
|
|
|
*param++ = 0;
|
|
|
|
if ((!tag_close && sptr < FF_ARRAY_ELEMS(stack)) ||
|
|
|
|
( tag_close && sptr > 0 && !strcmp(stack[sptr-1].tag, buffer))) {
|
|
|
|
int i, j, unknown = 0;
|
|
|
|
in += len + tag_close;
|
|
|
|
if (!tag_close)
|
|
|
|
memset(stack+sptr, 0, sizeof(*stack));
|
|
|
|
if (!strcmp(buffer, "font")) {
|
|
|
|
if (tag_close) {
|
|
|
|
for (i=PARAM_NUMBER-1; i>=0; i--)
|
|
|
|
if (stack[sptr-1].param[i][0])
|
|
|
|
for (j=sptr-2; j>=0; j--)
|
|
|
|
if (stack[j].param[i][0]) {
|
2014-09-28 09:57:46 +00:00
|
|
|
av_bprintf(dst, "%s", stack[j].param[i]);
|
2010-12-28 23:52:53 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
while (param) {
|
|
|
|
if (!strncmp(param, "size=", 5)) {
|
|
|
|
unsigned font_size;
|
|
|
|
param += 5 + (param[5] == '"');
|
|
|
|
if (sscanf(param, "%u", &font_size) == 1) {
|
|
|
|
snprintf(stack[sptr].param[PARAM_SIZE],
|
|
|
|
sizeof(stack[0].param[PARAM_SIZE]),
|
|
|
|
"{\\fs%u}", font_size);
|
|
|
|
}
|
|
|
|
} else if (!strncmp(param, "color=", 6)) {
|
|
|
|
param += 6 + (param[6] == '"');
|
|
|
|
snprintf(stack[sptr].param[PARAM_COLOR],
|
|
|
|
sizeof(stack[0].param[PARAM_COLOR]),
|
|
|
|
"{\\c&H%X&}",
|
|
|
|
html_color_parse(avctx, param));
|
|
|
|
} else if (!strncmp(param, "face=", 5)) {
|
|
|
|
param += 5 + (param[5] == '"');
|
|
|
|
len = strcspn(param,
|
|
|
|
param[-1] == '"' ? "\"" :" ");
|
|
|
|
av_strlcpy(tmp, param,
|
|
|
|
FFMIN(sizeof(tmp), len+1));
|
|
|
|
param += len;
|
|
|
|
snprintf(stack[sptr].param[PARAM_FACE],
|
|
|
|
sizeof(stack[0].param[PARAM_FACE]),
|
|
|
|
"{\\fn%s}", tmp);
|
|
|
|
}
|
|
|
|
if ((param = strchr(param, ' ')))
|
|
|
|
param++;
|
|
|
|
}
|
|
|
|
for (i=0; i<PARAM_NUMBER; i++)
|
2014-09-28 09:57:46 +00:00
|
|
|
if (stack[sptr].param[i][0])
|
|
|
|
av_bprintf(dst, "%s", stack[sptr].param[i]);
|
2010-12-28 23:52:53 +00:00
|
|
|
}
|
|
|
|
} else if (!buffer[1] && strspn(buffer, "bisu") == 1) {
|
2014-09-28 09:57:46 +00:00
|
|
|
av_bprintf(dst, "{\\%c%d}", buffer[0], !tag_close);
|
2010-12-28 23:52:53 +00:00
|
|
|
} else {
|
|
|
|
unknown = 1;
|
|
|
|
snprintf(tmp, sizeof(tmp), "</%s>", buffer);
|
|
|
|
}
|
|
|
|
if (tag_close) {
|
|
|
|
sptr--;
|
|
|
|
} else if (unknown && !strstr(in, tmp)) {
|
|
|
|
in -= len + tag_close;
|
2014-09-28 09:57:46 +00:00
|
|
|
av_bprint_chars(dst, *in, 1);
|
2010-12-28 23:52:53 +00:00
|
|
|
} else
|
|
|
|
av_strlcpy(stack[sptr++].tag, buffer,
|
|
|
|
sizeof(stack[0].tag));
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
default:
|
2014-09-28 09:57:46 +00:00
|
|
|
av_bprint_chars(dst, *in, 1);
|
2010-12-28 23:52:53 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (*in != ' ' && *in != '\r' && *in != '\n')
|
|
|
|
line_start = 0;
|
|
|
|
}
|
|
|
|
|
2014-09-28 09:57:46 +00:00
|
|
|
while (dst->len >= 2 && !strncmp(&dst->str[dst->len - 2], "\\N", 2))
|
|
|
|
dst->len -= 2;
|
|
|
|
dst->str[dst->len] = 0;
|
|
|
|
rstrip_spaces_buf(dst);
|
2010-12-28 23:52:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int srt_decode_frame(AVCodecContext *avctx,
|
|
|
|
void *data, int *got_sub_ptr, AVPacket *avpkt)
|
|
|
|
{
|
|
|
|
AVSubtitle *sub = data;
|
2014-09-28 09:57:46 +00:00
|
|
|
AVBPrint buffer;
|
2010-12-28 23:52:53 +00:00
|
|
|
int ts_start, ts_end, x1 = -1, y1 = -1, x2 = -1, y2 = -1;
|
2014-09-20 20:14:11 +00:00
|
|
|
int size, ret;
|
2012-10-24 22:01:42 +00:00
|
|
|
const uint8_t *p = av_packet_get_side_data(avpkt, AV_PKT_DATA_SUBTITLE_POSITION, &size);
|
|
|
|
|
|
|
|
if (p && size == 16) {
|
|
|
|
x1 = AV_RL32(p );
|
|
|
|
y1 = AV_RL32(p + 4);
|
|
|
|
x2 = AV_RL32(p + 8);
|
|
|
|
y2 = AV_RL32(p + 12);
|
|
|
|
}
|
2010-12-28 23:52:53 +00:00
|
|
|
|
|
|
|
if (avpkt->size <= 0)
|
|
|
|
return avpkt->size;
|
|
|
|
|
2014-09-28 09:57:46 +00:00
|
|
|
av_bprint_init(&buffer, 0, AV_BPRINT_SIZE_UNLIMITED);
|
|
|
|
|
2014-09-14 18:30:27 +00:00
|
|
|
// TODO: reindent
|
2012-08-12 03:27:51 +00:00
|
|
|
// Do final divide-by-10 outside rescale to force rounding down.
|
|
|
|
ts_start = av_rescale_q(avpkt->pts,
|
|
|
|
avctx->time_base,
|
|
|
|
(AVRational){1,100});
|
|
|
|
ts_end = av_rescale_q(avpkt->pts + avpkt->duration,
|
|
|
|
avctx->time_base,
|
|
|
|
(AVRational){1,100});
|
2014-09-28 09:57:46 +00:00
|
|
|
|
|
|
|
srt_to_ass(avctx, &buffer, avpkt->data, x1, y1, x2, y2);
|
2014-10-19 19:03:57 +00:00
|
|
|
ret = ff_ass_add_rect_bprint(sub, &buffer, ts_start, ts_end-ts_start);
|
2014-09-28 09:57:46 +00:00
|
|
|
av_bprint_finalize(&buffer, NULL);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
2010-12-28 23:52:53 +00:00
|
|
|
|
|
|
|
*got_sub_ptr = sub->num_rects > 0;
|
|
|
|
return avpkt->size;
|
|
|
|
}
|
|
|
|
|
2012-08-12 03:27:51 +00:00
|
|
|
#if CONFIG_SRT_DECODER
|
2012-10-24 22:01:42 +00:00
|
|
|
/* deprecated decoder */
|
2011-01-25 21:40:11 +00:00
|
|
|
AVCodec ff_srt_decoder = {
|
2010-12-28 23:52:53 +00:00
|
|
|
.name = "srt",
|
2014-09-14 18:30:27 +00:00
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("SubRip subtitle"),
|
2010-12-28 23:52:53 +00:00
|
|
|
.type = AVMEDIA_TYPE_SUBTITLE,
|
2014-09-14 18:30:27 +00:00
|
|
|
.id = AV_CODEC_ID_SUBRIP,
|
2010-12-28 23:52:53 +00:00
|
|
|
.init = ff_ass_subtitle_header_default,
|
|
|
|
.decode = srt_decode_frame,
|
|
|
|
};
|
2012-08-12 03:27:51 +00:00
|
|
|
#endif
|
|
|
|
|
|
|
|
#if CONFIG_SUBRIP_DECODER
|
|
|
|
AVCodec ff_subrip_decoder = {
|
|
|
|
.name = "subrip",
|
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("SubRip subtitle"),
|
|
|
|
.type = AVMEDIA_TYPE_SUBTITLE,
|
|
|
|
.id = AV_CODEC_ID_SUBRIP,
|
|
|
|
.init = ff_ass_subtitle_header_default,
|
|
|
|
.decode = srt_decode_frame,
|
|
|
|
};
|
|
|
|
#endif
|