[FFmpeg-cvslog] avformat: Add a mechanism to allow demuxers to detect byte based seeking.

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Thu Apr  4 04:01:12 2013 +0200| [e10f5bd05cec8fe59bb43fd28c4c2a092ca5f440] | committer: Michael Niedermayer

avformat: Add a mechanism to allow demuxers to detect byte based seeking.

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e10f5bd05cec8fe59bb43fd28c4c2a092ca5f440
---

 libavformat/avformat.h |    8 ++++++++
 libavformat/utils.c    |    2 ++
 2 files changed, 10 insertions(+)

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 5760303..80d693a 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -1257,6 +1257,14 @@ typedef struct AVFormatContext {
      */
 #define RAW_PACKET_BUFFER_SIZE 2500000
     int raw_packet_buffer_remaining_size;
+
+    /**
+     * IO repositioned flag.
+     * This is set by avformat when the underlaying IO context read pointer
+     * is repositioned, for example when doing byte based seeking.
+     * Demuxers can use the flag to detect such changes.
+     */
+    int io_repositioned;
 } AVFormatContext;
 
 /**
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 001b0e3..c5d6d32 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2018,6 +2018,8 @@ static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, in
 
     avio_seek(s->pb, pos, SEEK_SET);
 
+    s->io_repositioned = 1;
+
     return 0;
 }