--- /dev/null
+/*
+ * MicroDVD subtitle demuxer
+ * 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 "avformat.h"
+#include "internal.h"
+#include "libavutil/intreadwrite.h"
+
+#define MAX_LINESIZE 2048
+
+
+typedef struct {
+ uint8_t lines[3][MAX_LINESIZE];
+ int64_t pos[3];
+} MicroDVDContext;
+
+
+static int microdvd_probe(AVProbeData *p)
+{
+ unsigned char c, *ptr = p->buf;
+ int i;
+
+ if (AV_RB24(ptr) == 0xEFBBBF)
+ ptr += 3; /* skip UTF-8 BOM */
+
+ for (i=0; i<3; i++) {
+ if (sscanf(ptr, "{%*d}{}%c", &c) != 1 &&
+ sscanf(ptr, "{%*d}{%*d}%c", &c) != 1 &&
+ sscanf(ptr, "{DEFAULT}{}%c", &c) != 1)
+ return 0;
+ ptr += strcspn(ptr, "\n") + 1;
+ }
+ return AVPROBE_SCORE_MAX;
+}
+
+static int microdvd_read_header(AVFormatContext *s, AVFormatParameters *ap)
+{
+ AVRational pts_info = (AVRational){ 2997, 125 }; /* default: 23.976 fps */
+ MicroDVDContext *microdvd = s->priv_data;
+ AVStream *st = av_new_stream(s, 0);
+ int i, frame;
+ double fps;
+ char c;
+
+ if (!st)
+ return -1;
+ for (i=0; i<FF_ARRAY_ELEMS(microdvd->lines); i++) {
+ microdvd->pos[i] = avio_tell(s->pb);
+ ff_get_line(s->pb, microdvd->lines[i], sizeof(microdvd->lines[i]));
+ if ((sscanf(microdvd->lines[i], "{%d}{}%6lf", &frame, &fps) == 2 ||
+ sscanf(microdvd->lines[i], "{%d}{%*d}%6lf", &frame, &fps) == 2)
+ && frame <= 1 && fps > 3 && fps < 100)
+ pts_info = av_d2q(fps, 100000);
+ if (sscanf(microdvd->lines[i], "{DEFAULT}{}%c", &c) == 1) {
+ st->codec->extradata = av_strdup(microdvd->lines[i] + 11);
+ st->codec->extradata_size = strlen(st->codec->extradata);
+ i--;
+ }
+ }
+ av_set_pts_info(st, 64, pts_info.den, pts_info.num);
+ st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
+ st->codec->codec_id = CODEC_ID_MICRODVD;
+ return 0;
+}
+
+static int64_t get_pts(const char *buf)
+{
+ int frame;
+ char c;
+
+ if (sscanf(buf, "{%d}{%c", &frame, &c) == 2)
+ return frame;
+ return AV_NOPTS_VALUE;
+}
+
+static int microdvd_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ MicroDVDContext *microdvd = s->priv_data;
+ char buffer[MAX_LINESIZE];
+ int64_t pos = avio_tell(s->pb);
+ int i, len = 0, res = AVERROR_EOF;
+
+ for (i=0; i<FF_ARRAY_ELEMS(microdvd->lines); i++) {
+ if (microdvd->lines[i][0]) {
+ strcpy(buffer, microdvd->lines[i]);
+ pos = microdvd->pos[i];
+ len = strlen(buffer);
+ microdvd->lines[i][0] = 0;
+ break;
+ }
+ }
+ if (!len)
+ len = ff_get_line(s->pb, buffer, sizeof(buffer));
+
+ if (buffer[0] && !(res = av_new_packet(pkt, len))) {
+ memcpy(pkt->data, buffer, len);
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ pkt->pos = pos;
+ pkt->pts = pkt->dts = get_pts(buffer);
+ }
+ return res;
+}
+
+AVInputFormat ff_microdvd_demuxer = {
+ .name = "microdvd",
+ .long_name = NULL_IF_CONFIG_SMALL("MicroDVD subtitle format"),
+ .priv_data_size = sizeof(MicroDVDContext),
+ .read_probe = microdvd_probe,
+ .read_header = microdvd_read_header,
+ .read_packet = microdvd_read_packet,
+ .flags = AVFMT_GENERIC_INDEX,
+};
--- /dev/null
+/*
+ * MicroDVD subtitle muxer
+ * 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 "avformat.h"
+#include "rawenc.h"
+
+static int microdvd_write_header(struct AVFormatContext *s)
+{
+ AVCodecContext *avctx = s->streams[0]->codec;
+
+ if (s->nb_streams != 1 || avctx->codec_id != CODEC_ID_MICRODVD) {
+ av_log(s, AV_LOG_ERROR, "Exactly one MicroDVD stream is needed.\n");
+ return -1;
+ }
+
+ if (avctx->extradata && avctx->extradata_size > 0) {
+ avio_write(s->pb, "{DEFAULT}{}", 11);
+ avio_write(s->pb, avctx->extradata, avctx->extradata_size);
+ avio_flush(s->pb);
+ }
+ return 0;
+}
+
+AVOutputFormat ff_microdvd_muxer = {
+ .name = "microdvd",
+ .long_name = NULL_IF_CONFIG_SMALL("MicroDVD subtitle format"),
+ .mime_type = "text/x-microdvd",
+ .extensions = "sub",
+ .write_header = microdvd_write_header,
+ .write_packet = ff_raw_write_packet,
+ .flags = AVFMT_NOTIMESTAMPS,
+ .subtitle_codec = CODEC_ID_MICRODVD,
+};
projects / ffmpeg / commitdiff