HLS: allow pause/resume in the middle of a segment

- when down switching, decide whether to finish current segment
  based on bandwidth settings, abort current segment if needed.

- when switching, pause new fetcher after the first 47K chunk,
  and go back to resume old fethcer to stop point immediately.

- when old fetcher reaches stop point, swap packet sources and
  resume new fetcher.

- mark switching as done as soon as old fecther reaches stop
  point. This allows us to resume bandwidth monitoring earlier,
  and do subsequent switches sooner.

bug: 19567254
Change-Id: Iba4b5fb9b06541bb1e49592536648f5d4cbc69ab

1 files changed, 4 insertions, 0 deletions

diff --git a/media/libstagefright/mpeg2ts/AnotherPacketSource.h b/media/libstagefright/mpeg2ts/AnotherPacketSource.h
index 809a858..d4fde7c 100644
--- a/media/libstagefright/mpeg2ts/AnotherPacketSource.h
+++ b/media/libstagefright/mpeg2ts/AnotherPacketSource.h
@@ -43,8 +43,12 @@ struct AnotherPacketSource : public MediaSource {
 
     void clear();
 
+    // Returns true if we have any packets including discontinuities
     bool hasBufferAvailable(status_t *finalResult);
 
+    // Returns true if we have packets that's not discontinuities
+    bool hasDataBufferAvailable(status_t *finalResult);
+
     // Returns the difference between the last and the first queued
     // presentation timestamps since the last discontinuity (if any).
     int64_t getBufferedDurationUs(status_t *finalResult);