[FFmpeg-cvslog] segafilm: implement seeking

[Paul B Mahol]

ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Thu Nov  5 12:04:51 2015 +0100| [c012c6f1a8b34828a7870dc1854422934f14b79a] | committer: Vittorio Giovara

segafilm: implement seeking

Signed-off-by: Vittorio Giovara <vittorio.giovara at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c012c6f1a8b34828a7870dc1854422934f14b79a
---

 libavformat/segafilm.c |   23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/libavformat/segafilm.c b/libavformat/segafilm.c
index 4209197..e9d86c1 100644
--- a/libavformat/segafilm.c
+++ b/libavformat/segafilm.c
@@ -240,6 +240,11 @@ static int film_read_header(AVFormatContext *s)
             film->sample_table[i].stream = film->video_stream_index;
             film->sample_table[i].pts = AV_RB32(&scratch[8]) & 0x7FFFFFFF;
             film->sample_table[i].keyframe = (scratch[8] & 0x80) ? 0 : 1;
+            av_add_index_entry(s->streams[film->video_stream_index],
+                               film->sample_table[i].sample_offset,
+                               film->sample_table[i].pts,
+                               film->sample_table[i].sample_size, 0,
+                               film->sample_table[i].keyframe);
         }
     }
 
@@ -288,6 +293,23 @@ static int film_read_packet(AVFormatContext *s,
     return ret;
 }
 
+static int film_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
+{
+    FilmDemuxContext *film = s->priv_data;
+    AVStream *st = s->streams[stream_index];
+    int ret = av_index_search_timestamp(st, timestamp, flags);
+    if (ret < 0)
+        return ret;
+
+    ret = avio_seek(s->pb, st->index_entries[ret].pos, SEEK_SET);
+    if (ret < 0)
+        return ret;
+
+    film->current_sample = ret;
+
+    return 0;
+}
+
 AVInputFormat ff_segafilm_demuxer = {
     .name           = "film_cpk",
     .long_name      = NULL_IF_CONFIG_SMALL("Sega FILM / CPK"),
@@ -296,4 +318,5 @@ AVInputFormat ff_segafilm_demuxer = {
     .read_header    = film_read_header,
     .read_packet    = film_read_packet,
     .read_close     = film_read_close,
+    .read_seek      = film_read_seek,
 };