asfdec_o: prevent overflow causing seekback

[ffmpeg] / libavformat / avformat.h

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index ddf07b1bf0321781910da1da70458a4828ffa1d5..e6c35ab8d85c926e3c745f31b7acb84595a762fd 100644 (file)
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -600,6 +600,29 @@ typedef struct AVOutputFormat {
      */
     int (*free_device_capabilities)(struct AVFormatContext *s, struct AVDeviceCapabilitiesQuery *caps);
     enum AVCodecID data_codec; /**< default data codec */
+    /**
+     * Initialize format. May allocate data here, and set any AVFormatContext or
+     * AVStream parameters that need to be set before packets are sent.
+     * This method must not write output.
+     *
+     * Any allocations made here must be freed in deinit().
+     */
+    int (*init)(struct AVFormatContext *);
+    /**
+     * Deinitialize format. If present, this is called whenever the muxer is being
+     * destroyed, regardless of whether or not the header has been written.
+     *
+     * If a trailer is being written, this is called after write_trailer().
+     *
+     * This is called if init() fails as well.
+     */
+    void (*deinit)(struct AVFormatContext *);
+    /**
+     * Set up any necessary bitstream filtering and extract any extra data needed
+     * for the global header.
+     * Return 0 if more packets from this stream must be checked; 1 if not.
+     */
+    int (*check_bitstream)(struct AVFormatContext *, const AVPacket *pkt);
 } AVOutputFormat;
 /**
  * @}
@@ -967,7 +990,7 @@ typedef struct AVStream {
     /**
      * Stream information used internally by av_find_stream_info()
      */
-#define MAX_STD_TIMEBASES (30*12+7+6)
+#define MAX_STD_TIMEBASES (30*12+30+3+6)
     struct {
         int64_t last_dts;
         int64_t duration_gcd;
@@ -2283,6 +2306,7 @@ void avformat_close_input(AVFormatContext **s);
  *
  * @see av_opt_find, av_dict_set, avio_open, av_oformat_next.
  */
+av_warn_unused_result
 int avformat_write_header(AVFormatContext *s, AVDictionary **options);
 
 /**
@@ -2763,6 +2787,17 @@ int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
 
 int avformat_queue_attached_pictures(AVFormatContext *s);
 
+/**
+ * Apply a list of bitstream filters to a packet.
+ *
+ * @param codec AVCodecContext, usually from an AVStream
+ * @param pkt the packet to apply filters to
+ * @param bsfc a NULL-terminated list of filters to apply
+ * @return  >=0 on success;
+ *          AVERROR code on failure
+ */
+int av_apply_bitstream_filters(AVCodecContext *codec, AVPacket *pkt,
+                               AVBitStreamFilterContext *bsfc);
 
 /**
  * @}