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-rw-r--r--libavcodec/mpl2dec.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/libavcodec/mpl2dec.c b/libavcodec/mpl2dec.c
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+++ b/libavcodec/mpl2dec.c
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+/*
+ * 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,
+};