1 files changed, 22 insertions, 7 deletions

diff --git a/media/libstagefright/matroska/MatroskaExtractor.cpp b/media/libstagefright/matroska/MatroskaExtractor.cpp
index 0e4dd2b..d7bec59 100644
--- a/media/libstagefright/matroska/MatroskaExtractor.cpp
+++ b/media/libstagefright/matroska/MatroskaExtractor.cpp
@@ -315,7 +315,7 @@ void BlockIterator::seek(
 
     *actualFrameTimeUs = -1ll;
 
-    const int64_t seekTimeNs = seekTimeUs * 1000ll;
+    const int64_t seekTimeNs = seekTimeUs * 1000ll - mExtractor->mSeekPreRollNs;
 
     mkvparser::Segment* const pSegment = mExtractor->mSegment;
 
@@ -630,7 +630,8 @@ MatroskaExtractor::MatroskaExtractor(const sp<DataSource> &source)
       mReader(new DataSourceReader(mDataSource)),
       mSegment(NULL),
       mExtractedThumbnails(false),
-      mIsWebm(false) {
+      mIsWebm(false),
+      mSeekPreRollNs(0) {
     off64_t size;
     mIsLiveStreaming =
         (mDataSource->flags()
@@ -656,14 +657,22 @@ MatroskaExtractor::MatroskaExtractor(const sp<DataSource> &source)
         return;
     }
 
+    // from mkvparser::Segment::Load(), but stop at first cluster
     ret = mSegment->ParseHeaders();
-    CHECK_EQ(ret, 0);
-
-    long len;
-    ret = mSegment->LoadCluster(pos, len);
-    CHECK_EQ(ret, 0);
+    if (ret == 0) {
+        long len;
+        ret = mSegment->LoadCluster(pos, len);
+        if (ret >= 1) {
+            // no more clusters
+            ret = 0;
+        }
+    } else if (ret > 0) {
+        ret = mkvparser::E_BUFFER_NOT_FULL;
+    }
 
     if (ret < 0) {
+        ALOGW("Corrupt %s source: %s", mIsWebm ? "webm" : "matroska",
+                uriDebugString(mDataSource->getUri()).c_str());
         delete mSegment;
         mSegment = NULL;
         return;
@@ -921,6 +930,12 @@ void MatroskaExtractor::addTracks() {
 
                     err = addVorbisCodecInfo(
                             meta, codecPrivate, codecPrivateSize);
+                } else if (!strcmp("A_OPUS", codecID)) {
+                    meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_OPUS);
+                    meta->setData(kKeyOpusHeader, 0, codecPrivate, codecPrivateSize);
+                    meta->setInt64(kKeyOpusCodecDelay, track->GetCodecDelay());
+                    meta->setInt64(kKeyOpusSeekPreRoll, track->GetSeekPreRoll());
+                    mSeekPreRollNs = track->GetSeekPreRoll();
                 } else if (!strcmp("A_MPEG/L3", codecID)) {
                     meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG);
                 } else {