This removes big CPU overhead for demuxing chained ogg streams.
Signed-off-by: Paul B Mahol <one...@gmail.com>
---
libavformat/aviobuf.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index a77517d712..9dfef2377e 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -999,10 +999,10 @@ int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
int filled = s->buf_end - s->buffer;
ptrdiff_t checksum_ptr_offset = s->checksum_ptr ? s->checksum_ptr -
s->buffer : -1;
- buf_size += s->buf_ptr - s->buffer + max_buffer_size;
-
if (buf_size < filled || s->seekable || !s->read_packet)
return 0;
+ buf_size += s->buf_end - s->buf_ptr + max_buffer_size;
+
av_assert0(!s->write_flag);
buffer = av_malloc(buf_size);
--
2.17.1
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