1 files changed, 77 insertions, 0 deletions
diff --git a/include/media/stagefright/MediaClock.h b/include/media/stagefright/MediaClock.h
new file mode 100644
index 0000000..660764f
--- /dev/null
+++ b/include/media/stagefright/MediaClock.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MEDIA_CLOCK_H_
+
+#define MEDIA_CLOCK_H_
+
+#include <media/stagefright/foundation/ABase.h>
+#include <utils/Mutex.h>
+#include <utils/RefBase.h>
+
+namespace android {
+
+struct AMessage;
+
+struct MediaClock : public RefBase {
+    MediaClock();
+
+    void setStartingTimeMedia(int64_t startingTimeMediaUs);
+
+    void clearAnchor();
+    // It's required to use timestamp of just rendered frame as
+    // anchor time in paused state.
+    void updateAnchor(
+        int64_t anchorTimeMediaUs,
+        int64_t anchorTimeRealUs,
+        int64_t maxTimeMediaUs = INT64_MAX);
+
+    void updateMaxTimeMedia(int64_t maxTimeMediaUs);
+
+    void setPlaybackRate(float rate);
+
+    // query media time corresponding to real time |realUs|, and save the
+    // result in |outMediaUs|.
+    status_t getMediaTime(int64_t realUs,
+                          int64_t *outMediaUs,
+                          bool allowPastMaxTime = false);
+    // query real time corresponding to media time |targetMediaUs|.
+    // The result is saved in |outRealUs|.
+    status_t getRealTimeFor(int64_t targetMediaUs, int64_t *outRealUs);
+
+protected:
+    virtual ~MediaClock();
+
+private:
+    status_t getMediaTime_l(int64_t realUs,
+                            int64_t *outMediaUs,
+                            bool allowPastMaxTime);
+
+    Mutex mLock;
+
+    int64_t mAnchorTimeMediaUs;
+    int64_t mAnchorTimeRealUs;
+    int64_t mMaxTimeMediaUs;
+    int64_t mStartingTimeMediaUs;
+
+    float mPlaybackRate;
+
+    DISALLOW_EVIL_CONSTRUCTORS(MediaClock);
+};
+
+}  // namespace android
+
+#endif  // MEDIA_CLOCK_H_