1 files changed, 34 insertions, 14 deletions

diff --git a/media/libstagefright/httplive/PlaylistFetcher.h b/media/libstagefright/httplive/PlaylistFetcher.h
index 4e15f85..dab56df 100644
--- a/media/libstagefright/httplive/PlaylistFetcher.h
+++ b/media/libstagefright/httplive/PlaylistFetcher.h
@@ -36,6 +36,7 @@ class String8;
 struct PlaylistFetcher : public AHandler {
     static const int64_t kMinBufferedDurationUs;
     static const int32_t kDownloadBlockSize;
+    static const int64_t kFetcherResumeThreshold;
 
     enum {
         kWhatStarted,
@@ -43,10 +44,11 @@ struct PlaylistFetcher : public AHandler {
         kWhatStopped,
         kWhatError,
         kWhatDurationUpdate,
-        kWhatTemporarilyDoneFetching,
+        kWhatTargetDurationUpdate,
         kWhatPrepared,
         kWhatPreparationFailed,
         kWhatStartedAt,
+        kWhatStopReached,
     };
 
     PlaylistFetcher(
@@ -64,10 +66,10 @@ struct PlaylistFetcher : public AHandler {
             int64_t startTimeUs = -1ll,         // starting timestamps
             int64_t segmentStartTimeUs = -1ll, // starting position within playlist
             // startTimeUs!=segmentStartTimeUs only when playlist is live
-            int32_t startDiscontinuitySeq = 0,
-            bool adaptive = false);
+            int32_t startDiscontinuitySeq = -1,
+            LiveSession::SeekMode seekMode = LiveSession::kSeekModeExactPosition);
 
-    void pauseAsync();
+    void pauseAsync(float thresholdRatio);
 
     void stopAsync(bool clear = true);
 
@@ -95,6 +97,8 @@ private:
         kWhatDownloadNext   = 'dlnx',
     };
 
+    struct DownloadState;
+
     static const int64_t kMaxMonitorDelayUs;
     static const int32_t kNumSkipFrames;
 
@@ -105,6 +109,7 @@ private:
     sp<AMessage> mNotify;
     sp<AMessage> mStartTimeUsNotify;
 
+    sp<HTTPBase> mHTTPDataSource;
     sp<LiveSession> mSession;
     AString mURI;
 
@@ -116,7 +121,7 @@ private:
     // adapting or switching tracks.
     int64_t mSegmentStartTimeUs;
 
-    ssize_t mDiscontinuitySeq;
+    int32_t mDiscontinuitySeq;
     bool mStartTimeUsRelative;
     sp<AMessage> mStopParams; // message containing the latest timestamps we should fetch.
 
@@ -130,13 +135,16 @@ private:
     int32_t mSeqNumber;
     int32_t mNumRetries;
     bool mStartup;
-    bool mAdaptive;
-    bool mPrepared;
+    bool mIDRFound;
+    int32_t mSeekMode;
+    bool mTimeChangeSignaled;
     int64_t mNextPTSTimeUs;
 
     int32_t mMonitorQueueGeneration;
     const int32_t mSubtitleGeneration;
 
+    int32_t mLastDiscontinuitySeq;
+
     enum RefreshState {
         INITIAL_MINIMUM_RELOAD_DELAY,
         FIRST_UNCHANGED_RELOAD_ATTEMPT,
@@ -150,9 +158,8 @@ private:
     sp<ATSParser> mTSParser;
 
     bool mFirstPTSValid;
-    uint64_t mFirstPTS;
     int64_t mFirstTimeUs;
-    int64_t mAbsoluteTimeAnchorUs;
+    int64_t mSegmentFirstPTS;
     sp<AnotherPacketSource> mVideoBuffer;
 
     // Stores the initialization vector to decrypt the next block of cipher text, which can
@@ -160,6 +167,11 @@ private:
     // the last block of cipher text (cipher-block chaining).
     unsigned char mAESInitVec[16];
 
+    Mutex mThresholdLock;
+    float mThresholdRatio;
+
+    sp<DownloadState> mDownloadState;
+
     // Set first to true if decrypting the first segment of a playlist segment. When
     // first is true, reset the initialization vector based on the available
     // information in the manifest; otherwise, use the initialization vector as
@@ -175,6 +187,8 @@ private:
 
     void postMonitorQueue(int64_t delayUs = 0, int64_t minDelayUs = 0);
     void cancelMonitorQueue();
+    void setStoppingThreshold(float thresholdRatio);
+    bool shouldPauseDownload();
 
     int64_t delayUsToRefreshPlaylist() const;
     status_t refreshPlaylist();
@@ -182,12 +196,19 @@ private:
     // Returns the media time in us of the segment specified by seqNumber.
     // This is computed by summing the durations of all segments before it.
     int64_t getSegmentStartTimeUs(int32_t seqNumber) const;
+    // Returns the duration time in us of the segment specified.
+    int64_t getSegmentDurationUs(int32_t seqNumber) const;
 
     status_t onStart(const sp<AMessage> &msg);
     void onPause();
     void onStop(const sp<AMessage> &msg);
     void onMonitorQueue();
     void onDownloadNext();
+    bool initDownloadState(
+            AString &uri,
+            sp<AMessage> &itemMeta,
+            int32_t &firstSeqNumberInPlaylist,
+            int32_t &lastSeqNumberInPlaylist);
 
     // Resume a fetcher to continue until the stopping point stored in msg.
     status_t onResumeUntil(const sp<AMessage> &msg);
@@ -201,20 +222,19 @@ private:
     status_t extractAndQueueAccessUnits(
             const sp<ABuffer> &buffer, const sp<AMessage> &itemMeta);
 
+    void notifyStopReached();
     void notifyError(status_t err);
 
     void queueDiscontinuity(
             ATSParser::DiscontinuityType type, const sp<AMessage> &extra);
 
-    int32_t getSeqNumberWithAnchorTime(int64_t anchorTimeUs) const;
+    int32_t getSeqNumberWithAnchorTime(
+            int64_t anchorTimeUs, int64_t targetDurationUs) const;
     int32_t getSeqNumberForDiscontinuity(size_t discontinuitySeq) const;
     int32_t getSeqNumberForTime(int64_t timeUs) const;
 
     void updateDuration();
-
-    // Before resuming a fetcher in onResume, check the remaining duration is longer than that
-    // returned by resumeThreshold.
-    int64_t resumeThreshold(const sp<AMessage> &msg);
+    void updateTargetDuration();
 
     DISALLOW_EVIL_CONSTRUCTORS(PlaylistFetcher);
 };