avformat: Add max_streams option

This allows user apps to stop OOM due to excessive number of streams

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 1296f844955e513d19051c962656f829479d4fb9)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

1 files changed, 7 insertions, 0 deletions

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 34bad436cd..06a71c97ff 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -1866,6 +1866,13 @@ typedef struct AVFormatContext {
      * A callback for closing the streams opened with AVFormatContext.io_open().
      */
     void (*io_close)(struct AVFormatContext *s, AVIOContext *pb);
+
+    /**
+     * The maximum number of streams.
+     * - encoding: unused
+     * - decoding: set by user through AVOptions (NO direct access)
+     */
+    int max_streams;
 } AVFormatContext;
 
 int av_format_get_probe_score(const AVFormatContext *s);