avformat: add av_format_inject_global_side_data(), and disable it by default

After this commit applications needs to call av_format_inject_global_side_data()
or handle AVStream side data by some other means if they want it not to be lost.

This fixes a API incompatibility with libav.
libav API does not allow the data to be passed through AVPackets

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

1 files changed, 9 insertions, 1 deletions

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index ebebb3fb6e..a1185cafcb 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -862,6 +862,8 @@ typedef struct AVStream {
      * - muxing: May be set by the caller before avformat_write_header().
      *
      * Freed by libavformat in avformat_free_context().
+     *
+     * @see av_format_inject_global_side_data()
      */
     AVPacketSideData *side_data;
     /**
@@ -1043,7 +1045,7 @@ typedef struct AVStream {
     /**
      * Internal data to inject global side data
      */
-    int global_side_data_injected;
+    int inject_global_side_data;
 
 } AVStream;
 
@@ -1613,6 +1615,12 @@ av_format_control_message av_format_get_control_message_cb(const AVFormatContext
 void      av_format_set_control_message_cb(AVFormatContext *s, av_format_control_message callback);
 
 /**
+ * This function will cause global side data to be injected in the next packet
+ * of each stream as well as after any subsequent seek.
+ */
+void av_format_inject_global_side_data(AVFormatContext *s);
+
+/**
  * Returns the method used to set ctx->duration.
  *
  * @return AVFMT_DURATION_FROM_PTS, AVFMT_DURATION_FROM_STREAM, or AVFMT_DURATION_FROM_BITRATE.