mirror of https://github.com/FFmpeg/FFmpeg.git
Clément Bœsch
12 years ago
parent
2d3305e4f4
commit
5f02844c8d
14 changed files with 262 additions and 3 deletions
@ -0,0 +1,96 @@ |
||||
/*
|
||||
* 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 |
||||
* MPL2 subtitles decoder |
||||
* |
||||
* @see http://web.archive.org/web/20090328040233/http://napisy.ussbrowarek.org/mpl2-eng.html
|
||||
*/ |
||||
|
||||
#include "avcodec.h" |
||||
#include "ass.h" |
||||
#include "libavutil/bprint.h" |
||||
|
||||
static int mpl2_event_to_ass(AVBPrint *buf, const char *p) |
||||
{ |
||||
if (*p == ' ') |
||||
p++; |
||||
|
||||
while (*p) { |
||||
int got_style = 0; |
||||
|
||||
while (*p && strchr("/\\_", *p)) { |
||||
if (*p == '/') av_bprintf(buf, "{\\i1}"); |
||||
else if (*p == '\\') av_bprintf(buf, "{\\b1}"); |
||||
else if (*p == '_') av_bprintf(buf, "{\\u1}"); |
||||
got_style = 1; |
||||
p++; |
||||
} |
||||
|
||||
while (*p && *p != '|') { |
||||
if (*p != '\r' && *p != '\n') |
||||
av_bprint_chars(buf, *p, 1); |
||||
p++; |
||||
} |
||||
|
||||
if (*p == '|') { |
||||
if (got_style) |
||||
av_bprintf(buf, "{\\r}"); |
||||
av_bprintf(buf, "\\N"); |
||||
p++; |
||||
} |
||||
} |
||||
|
||||
av_bprintf(buf, "\r\n"); |
||||
return 0; |
||||
} |
||||
|
||||
static int mpl2_decode_frame(AVCodecContext *avctx, void *data, |
||||
int *got_sub_ptr, AVPacket *avpkt) |
||||
{ |
||||
AVBPrint buf; |
||||
AVSubtitle *sub = data; |
||||
const char *ptr = avpkt->data; |
||||
const int ts_start = av_rescale_q(avpkt->pts, avctx->time_base, (AVRational){1,100}); |
||||
const int ts_duration = avpkt->duration != -1 ? |
||||
av_rescale_q(avpkt->duration, avctx->time_base, (AVRational){1,100}) : -1; |
||||
|
||||
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); |
||||
if (ptr && avpkt->size > 0 && *ptr && !mpl2_event_to_ass(&buf, ptr)) { |
||||
if (!av_bprint_is_complete(&buf)) { |
||||
av_bprint_finalize(&buf, NULL); |
||||
return AVERROR(ENOMEM); |
||||
} |
||||
ff_ass_add_rect(sub, buf.str, ts_start, ts_duration, 0); |
||||
} |
||||
*got_sub_ptr = sub->num_rects > 0; |
||||
av_bprint_finalize(&buf, NULL); |
||||
return avpkt->size; |
||||
} |
||||
|
||||
AVCodec ff_mpl2_decoder = { |
||||
.name = "mpl2", |
||||
.long_name = NULL_IF_CONFIG_SMALL("MPL2 subtitle"), |
||||
.type = AVMEDIA_TYPE_SUBTITLE, |
||||
.id = AV_CODEC_ID_MPL2, |
||||
.decode = mpl2_decode_frame, |
||||
.init = ff_ass_subtitle_header_default, |
||||
}; |
||||
@ -0,0 +1,146 @@ |
||||
/*
|
||||
* 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 |
||||
* MPL2 subtitles format demuxer |
||||
*/ |
||||
|
||||
#include "avformat.h" |
||||
#include "internal.h" |
||||
#include "subtitles.h" |
||||
|
||||
typedef struct { |
||||
FFDemuxSubtitlesQueue q; |
||||
} MPL2Context; |
||||
|
||||
static int mpl2_probe(AVProbeData *p) |
||||
{ |
||||
int i; |
||||
char c; |
||||
int64_t start, end; |
||||
const unsigned char *ptr = p->buf; |
||||
const unsigned char *ptr_end = ptr + p->buf_size; |
||||
|
||||
for (i = 0; i < 2; i++) { |
||||
if (sscanf(ptr, "[%"PRId64"][%"PRId64"]%c", &start, &end, &c) != 3 && |
||||
sscanf(ptr, "[%"PRId64"][]%c", &start, &c) != 2) |
||||
return 0; |
||||
ptr += strcspn(ptr, "\r\n") + 1; |
||||
if (ptr >= ptr_end) |
||||
return 0; |
||||
} |
||||
return AVPROBE_SCORE_MAX; |
||||
} |
||||
|
||||
static int read_ts(char **line, int64_t *pts_start, int *duration) |
||||
{ |
||||
char c; |
||||
int len; |
||||
int64_t end; |
||||
|
||||
if (sscanf(*line, "[%"PRId64"][]%c%n", |
||||
pts_start, &c, &len) >= 2) { |
||||
*duration = -1; |
||||
*line += len - 1; |
||||
return 0; |
||||
} |
||||
if (sscanf(*line, "[%"PRId64"][%"PRId64"]%c%n", |
||||
pts_start, &end, &c, &len) >= 3) { |
||||
*duration = end - *pts_start; |
||||
*line += len - 1; |
||||
return 0; |
||||
} |
||||
return -1; |
||||
} |
||||
|
||||
static int mpl2_read_header(AVFormatContext *s) |
||||
{ |
||||
MPL2Context *mpl2 = s->priv_data; |
||||
AVStream *st = avformat_new_stream(s, NULL); |
||||
int res = 0; |
||||
|
||||
if (!st) |
||||
return AVERROR(ENOMEM); |
||||
avpriv_set_pts_info(st, 64, 1, 10); |
||||
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
||||
st->codec->codec_id = AV_CODEC_ID_MPL2; |
||||
|
||||
while (!url_feof(s->pb)) { |
||||
char line[4096]; |
||||
char *p = line; |
||||
const int64_t pos = avio_tell(s->pb); |
||||
int len = ff_get_line(s->pb, line, sizeof(line)); |
||||
int64_t pts_start; |
||||
int duration; |
||||
|
||||
if (!len) |
||||
break; |
||||
|
||||
line[strcspn(line, "\r\n")] = 0; |
||||
|
||||
if (!read_ts(&p, &pts_start, &duration)) { |
||||
AVPacket *sub; |
||||
|
||||
sub = ff_subtitles_queue_insert(&mpl2->q, p, strlen(p), 0); |
||||
if (!sub) |
||||
return AVERROR(ENOMEM); |
||||
sub->pos = pos; |
||||
sub->pts = pts_start; |
||||
sub->duration = duration; |
||||
} |
||||
} |
||||
|
||||
ff_subtitles_queue_finalize(&mpl2->q); |
||||
return res; |
||||
} |
||||
|
||||
static int mpl2_read_packet(AVFormatContext *s, AVPacket *pkt) |
||||
{ |
||||
MPL2Context *mpl2 = s->priv_data; |
||||
return ff_subtitles_queue_read_packet(&mpl2->q, pkt); |
||||
} |
||||
|
||||
static int mpl2_read_seek(AVFormatContext *s, int stream_index, |
||||
int64_t min_ts, int64_t ts, int64_t max_ts, int flags) |
||||
{ |
||||
MPL2Context *mpl2 = s->priv_data; |
||||
return ff_subtitles_queue_seek(&mpl2->q, s, stream_index, |
||||
min_ts, ts, max_ts, flags); |
||||
} |
||||
|
||||
static int mpl2_read_close(AVFormatContext *s) |
||||
{ |
||||
MPL2Context *mpl2 = s->priv_data; |
||||
ff_subtitles_queue_clean(&mpl2->q); |
||||
return 0; |
||||
} |
||||
|
||||
AVInputFormat ff_mpl2_demuxer = { |
||||
.name = "mpl2", |
||||
.long_name = NULL_IF_CONFIG_SMALL("MPL2 subtitles"), |
||||
.priv_data_size = sizeof(MPL2Context), |
||||
.read_probe = mpl2_probe, |
||||
.read_header = mpl2_read_header, |
||||
.read_packet = mpl2_read_packet, |
||||
.read_seek2 = mpl2_read_seek, |
||||
.read_close = mpl2_read_close, |
||||
.extensions = "txt,mpl2", |
||||
}; |
||||
@ -0,0 +1 @@ |
||||
3c2fb62002aec3af16d83135a0e3b0fc |
||||
Loading…
Reference in new issue