Add MPlayer subtitles demuxer.

4 files changed, 143 insertions, 1 deletions

diff --git a/libavformat/Makefile b/libavformat/Makefile
index d0b47c06d0..921f7a722a 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -220,6 +220,7 @@ OBJS-$(CONFIG_MPEGTS_MUXER)              += mpegtsenc.o
 OBJS-$(CONFIG_MPEGVIDEO_DEMUXER)         += mpegvideodec.o rawdec.o
 OBJS-$(CONFIG_MPJPEG_MUXER)              += mpjpeg.o
 OBJS-$(CONFIG_MPL2_DEMUXER)              += mpl2dec.o
+OBJS-$(CONFIG_MPSUB_DEMUXER)             += mpsubdec.o
 OBJS-$(CONFIG_MSNWC_TCP_DEMUXER)         += msnwc_tcp.o
 OBJS-$(CONFIG_MTV_DEMUXER)               += mtv.o
 OBJS-$(CONFIG_MVI_DEMUXER)               += mvi.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 32458e4e83..a0fd0777bf 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -183,6 +183,7 @@ void av_register_all(void)
     REGISTER_DEMUXER (MPEGVIDEO,        mpegvideo);
     REGISTER_MUXER   (MPJPEG,           mpjpeg);
     REGISTER_DEMUXER (MPL2,             mpl2);
+    REGISTER_DEMUXER (MPSUB,            mpsub);
     REGISTER_DEMUXER (MSNWC_TCP,        msnwc_tcp);
     REGISTER_DEMUXER (MTV,              mtv);
     REGISTER_DEMUXER (MV,               mv);
diff --git a/libavformat/mpsubdec.c b/libavformat/mpsubdec.c
new file mode 100644
index 0000000000..2acafaa81b
--- /dev/null
+++ b/libavformat/mpsubdec.c
@@ -0,0 +1,140 @@
+/*
+ * 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
+ * MPlayer subtitles format demuxer
+ */
+
+#include "avformat.h"
+#include "internal.h"
+#include "subtitles.h"
+
+typedef struct {
+    FFDemuxSubtitlesQueue q;
+} MPSubContext;
+
+static int mpsub_probe(AVProbeData *p)
+{
+    const char *ptr     = p->buf;
+    const char *ptr_end = p->buf + p->buf_size;
+
+    while (ptr < ptr_end) {
+        int n;
+
+        if (!memcmp(ptr, "FORMAT=TIME", 11) ||
+            sscanf(ptr, "FORMAT=%d", &n) == 1)
+            return AVPROBE_SCORE_MAX/2;
+        ptr += strcspn(ptr, "\n") + 1;
+    }
+    return 0;
+}
+
+static int mpsub_read_header(AVFormatContext *s)
+{
+    MPSubContext *mpsub = s->priv_data;
+    AVStream *st;
+    AVBPrint buf;
+    AVRational pts_info = (AVRational){ 100, 1 }; // ts based by default
+    int res = 0;
+    float multiplier = 100.0;
+    float current_pts = 0;
+
+    av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
+
+    while (!url_feof(s->pb)) {
+        char line[1024];
+        float start, duration;
+        int fps, len = ff_get_line(s->pb, line, sizeof(line));
+
+        if (!len)
+            break;
+
+        line[strcspn(line, "\r\n")] = 0;
+
+        if (sscanf(line, "FORMAT=%d", &fps) == 1 && fps > 3 && fps < 100) {
+            /* frame based timing */
+            pts_info = (AVRational){ fps, 1 };
+            multiplier = 1.0;
+        } else if (sscanf(line, "%f %f", &start, &duration) == 2) {
+            AVPacket *sub;
+            const int64_t pos = avio_tell(s->pb);
+
+            ff_subtitles_read_chunk(s->pb, &buf);
+            if (buf.len) {
+                sub = ff_subtitles_queue_insert(&mpsub->q, buf.str, buf.len, 0);
+                if (!sub) {
+                    res = AVERROR(ENOMEM);
+                    goto end;
+                }
+                sub->pts = (int64_t)(current_pts + start*multiplier);
+                sub->duration = (int)(duration * multiplier);
+                current_pts += (start + duration) * multiplier;
+                sub->pos = pos;
+            }
+        }
+    }
+
+    st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+    avpriv_set_pts_info(st, 64, pts_info.den, pts_info.num);
+    st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
+    st->codec->codec_id   = AV_CODEC_ID_TEXT;
+
+    ff_subtitles_queue_finalize(&mpsub->q);
+
+end:
+    av_bprint_finalize(&buf, NULL);
+    return res;
+}
+
+static int mpsub_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    MPSubContext *mpsub = s->priv_data;
+    return ff_subtitles_queue_read_packet(&mpsub->q, pkt);
+}
+
+static int mpsub_read_seek(AVFormatContext *s, int stream_index,
+                           int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
+{
+    MPSubContext *mpsub = s->priv_data;
+    return ff_subtitles_queue_seek(&mpsub->q, s, stream_index,
+                                   min_ts, ts, max_ts, flags);
+}
+
+static int mpsub_read_close(AVFormatContext *s)
+{
+    MPSubContext *mpsub = s->priv_data;
+    ff_subtitles_queue_clean(&mpsub->q);
+    return 0;
+}
+
+AVInputFormat ff_mpsub_demuxer = {
+    .name           = "mpsub",
+    .long_name      = NULL_IF_CONFIG_SMALL("MPlayer subtitles"),
+    .priv_data_size = sizeof(MPSubContext),
+    .read_probe     = mpsub_probe,
+    .read_header    = mpsub_read_header,
+    .read_packet    = mpsub_read_packet,
+    .read_seek2     = mpsub_read_seek,
+    .read_close     = mpsub_read_close,
+    .extensions     = "sub",
+};
diff --git a/libavformat/version.h b/libavformat/version.h
index 31a25061d2..00a84be14c 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -30,7 +30,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 54
-#define LIBAVFORMAT_VERSION_MINOR 52
+#define LIBAVFORMAT_VERSION_MINOR 53
 #define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \