stagefright: Fix seeking in MPEG4 container

- seek based on user-visible timestamp
- seek to previous, next and closest exactly

Bug: 12786906
Change-Id: I2d5e1fbff6469b6f081a284be2222a4cb50aa754

1 files changed, 9 insertions, 1 deletions

diff --git a/media/libstagefright/include/SampleTable.h b/media/libstagefright/include/SampleTable.h
index fe146f2..d06df7b 100644
--- a/media/libstagefright/include/SampleTable.h
+++ b/media/libstagefright/include/SampleTable.h
@@ -75,7 +75,8 @@ public:
         kFlagClosest
     };
     status_t findSampleAtTime(
-            uint32_t req_time, uint32_t *sample_index, uint32_t flags);
+            uint64_t req_time, uint64_t scale_num, uint64_t scale_den,
+            uint32_t *sample_index, uint32_t flags);
 
     status_t findSyncSampleNear(
             uint32_t start_sample_index, uint32_t *sample_index,
@@ -138,6 +139,13 @@ private:
 
     friend struct SampleIterator;
 
+    // normally we don't round
+    inline uint64_t getSampleTime(
+            size_t sample_index, uint64_t scale_num, uint64_t scale_den) const {
+        return (mSampleTimeEntries[sample_index].mCompositionTime
+            * scale_num) / scale_den;
+    }
+
     status_t getSampleSize_l(uint32_t sample_index, size_t *sample_size);
     uint32_t getCompositionTimeOffset(uint32_t sampleIndex);