caching of timestamps for mpeg-ps so seeking is faster

move (av_)find_stream_index() to utils.c as its usefull outside mpeg.c
assert checking enabled, to find bugs quicker, should obviously be disabled later
(av_)add_index_entry() inserts new entries so that the list stays ordered and updates entries if already in it
(av_)index_search_timestamp() cleanup (kill ugly goto) and shorter

Originally committed as revision 2697 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 8 insertions, 0 deletions

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 64bea9c1cd..b098247ab3 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -195,6 +195,9 @@ typedef struct AVIndexEntry {
     int64_t pos;
     int64_t timestamp;
 #define AVINDEX_KEYFRAME 0x0001
+/* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
+#define AVINDEX_NEXT_KNOWN 0x0002
+#define AVINDEX_PREV_KNOWN 0x0004
     int flags;
 } AVIndexEntry;
 
@@ -544,6 +547,11 @@ AVStream *av_new_stream(AVFormatContext *s, int id);
 void av_set_pts_info(AVFormatContext *s, int pts_wrap_bits,
                      int pts_num, int pts_den);
 
+int av_find_default_stream_index(AVFormatContext *s);
+int av_index_search_timestamp(AVStream *st, int timestamp);
+void av_add_index_entry(AVStream *st,
+                            int64_t pos, int64_t timestamp, int flags);
+
 /* media file output */
 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
 int av_write_header(AVFormatContext *s);