[FFmpeg-cvslog] avformat/pp_bnk: allow seeking to start

[Zane van Iperen]

ffmpeg | branch: release/4.4 | Zane van Iperen <zane at zanevaniperen.com> | Tue Mar 23 21:51:57 2021 +1000| [df9fbc442d47d3067f6dd978d54431567c8bf3f2] | committer: Zane van Iperen

avformat/pp_bnk: allow seeking to start

Allows "ffplay -loop" to work.

Signed-off-by: Zane van Iperen <zane at zanevaniperen.com>
(cherry picked from commit 64fb63411de8b6970dda385bf87d4a70ce357602)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=df9fbc442d47d3067f6dd978d54431567c8bf3f2
---

 libavformat/pp_bnk.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/libavformat/pp_bnk.c b/libavformat/pp_bnk.c
index 5c89295d27..07eeca3cd5 100644
--- a/libavformat/pp_bnk.c
+++ b/libavformat/pp_bnk.c
@@ -313,6 +313,25 @@ static int pp_bnk_read_close(AVFormatContext *s)
     return 0;
 }
 
+static int pp_bnk_seek(AVFormatContext *s, int stream_index,
+                       int64_t pts, int flags)
+{
+    PPBnkCtx *ctx = s->priv_data;
+
+    if (pts != 0)
+        return AVERROR(EINVAL);
+
+    if (ctx->is_music) {
+        av_assert0(stream_index == 0);
+        ctx->tracks[0].bytes_read = 0;
+        ctx->tracks[1].bytes_read = 0;
+    } else {
+        ctx->tracks[stream_index].bytes_read = 0;
+    }
+
+    return 0;
+}
+
 AVInputFormat ff_pp_bnk_demuxer = {
     .name           = "pp_bnk",
     .long_name      = NULL_IF_CONFIG_SMALL("Pro Pinball Series Soundbank"),
@@ -320,5 +339,6 @@ AVInputFormat ff_pp_bnk_demuxer = {
     .read_probe     = pp_bnk_probe,
     .read_header    = pp_bnk_read_header,
     .read_packet    = pp_bnk_read_packet,
-    .read_close     = pp_bnk_read_close
+    .read_close     = pp_bnk_read_close,
+    .read_seek      = pp_bnk_seek,
 };