lavf: add automatic bitstream filtering; bump version

This solves the problem discussed in https://ffmpeg.org/pipermail/ffmpeg-devel/2015-September/179238.html
by allowing AVCodec::write_header to be delayed until after packets have been
run through required bitstream filters in order to generate global extradata.

It also provides a mechanism by which a muxer can add a bitstream filter to a
stream automatically, rather than prompting the user to do so.

1 files changed, 17 insertions, 0 deletions

diff --git a/libavformat/internal.h b/libavformat/internal.h
index 4297cb85d7..0e59da0c2d 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -117,6 +117,11 @@ struct AVFormatInternal {
     int inject_global_side_data;
 
     int avoid_negative_ts_use_pts;
+
+    /**
+     * Whether or not a header has already been written
+     */
+    int header_written;
 };
 
 struct AVStreamInternal {
@@ -125,6 +130,18 @@ struct AVStreamInternal {
      * from dts.
      */
     int reorder;
+
+    /**
+     * bitstream filter to run on stream
+     * - encoding: Set by muxer using ff_stream_add_bitstream_filter
+     * - decoding: unused
+     */
+    AVBitStreamFilterContext *bsfc;
+
+    /**
+     * Whether or not check_bitstream should still be run on each packet
+     */
+    int bitstream_checked;
 };
 
 #ifdef __GNUC__