Initial commit: video player - viper

Change-Id: Id5aa33598ce34659bad4a7a9ae5006bfb84f9bd1
Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>

1 files changed, 118 insertions, 0 deletions

diff --git a/Adaptation/Bola.h b/Adaptation/Bola.h
new file mode 100644
index 00000000..29011664
--- /dev/null
+++ b/Adaptation/Bola.h
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+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * 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 LIBDASH_FRAMEWORK_ADAPTATION_BOLA_H_
+#define LIBDASH_FRAMEWORK_ADAPTATION_BOLA_H_
+
+#include "AbstractAdaptationLogic.h"
+#include "../MPD/AdaptationSetStream.h"
+#include "../Input/IDASHReceiverObserver.h"
+
+namespace libdash
+{
+namespace framework
+{
+namespace adaptation
+{
+class BolaAdaptation : public AbstractAdaptationLogic
+{
+public:
+    BolaAdaptation            (dash::mpd::IMPD *mpd, dash::mpd::IPeriod *period, dash::mpd::IAdaptationSet *adaptationSet, bool isVid, struct AdaptationParameters *params);
+    virtual ~BolaAdaptation();
+
+    virtual LogicType getType();
+    virtual bool isUserDependent();
+    virtual bool isRateBased();
+    virtual bool isBufferBased();
+    virtual void bitrateUpdate(uint64_t bps, uint32_t segNum);
+    virtual void dLTimeUpdate(double time);
+    virtual void bufferUpdate(uint32_t bufferFill, int maxC);
+    void setBitrate(uint32_t bufferFill);
+    uint64_t getBitrate();
+    virtual void setMultimediaManager(viper::managers::IMultimediaManagerBase *_mmManager);
+    void notifyBitrateChange();
+    void onEOS(bool value);
+    void checkedByDASHReceiver();
+
+    int getQualityFromThroughput(uint64_t bps);
+    int getQualityFromBufferLevel(double bufferLevelSec);
+
+private:
+    enum BolaState
+    {
+        ONE_BITRATE,			// If one bitrate (or init failed), always NO_CHANGE
+        STARTUP,				// Download fragments at most recently measured throughput
+        STARTUP_NO_INC,			// If quality increased then decreased during startup, then quality cannot be increased.
+        STEADY					// The buffer is primed (should be above bufferTarget)
+    };
+
+    bool							initState;
+    double 							bufferMaxSizeSeconds;		// Usually set to 30s
+    double 							bufferTargetSeconds;  	// It is passed as an init parameter.
+    // It states the difference between STARTUP and STEADY
+    // 12s following dash.js implementation
+
+    double 							bolaBufferTargetSeconds; 	// BOLA introduces a virtual buffer level in order to make quality decisions
+    // as it was filled (instead of the actual bufferTargetSeconds)
+
+    double 							bolaBufferMaxSeconds; 	// When using the virtual buffer, it must be capped.
+
+    uint32_t 						bufferTargetPerc;		// Computed considering a bufferSize = 30s
+    double 							totalDuration;			// Total video duration in seconds (taken from MPD)
+    double 							segmentDuration;		// Segment duration in seconds
+
+    std::vector<uint64_t>			availableBitrates;
+    std::vector<double>				utilityVector;
+    uint32_t						bitrateCount;			// Number of available bitrates
+    BolaState						bolaState;				// Keeps track of Bola state
+
+    // Bola Vp and gp (multiplied by the segment duration 'p')
+    // They are dimensioned such that log utility would always prefer
+    // - the lowest bitrate when bufferLevel = segmentDuration
+    // - the highest bitrate when bufferLevel = bufferTarget
+    double							Vp;
+    double 							gp;
+
+    bool							safetyGuarantee;
+    double							maxRtt;
+
+    double 							virtualBuffer;
+
+    uint64_t						currentBitrate;
+    int 							currentQuality;
+    uint64_t						batchBw;
+    int								batchBwCount;
+    std::vector<uint64_t>			batchBwSamples;
+    uint64_t						instantBw;
+    uint64_t						averageBw;
+
+    double 							lastDownloadTimeInstant;
+    double 							currentDownloadTimeInstant;
+    double							lastSegmentDownloadTime;
+
+    uint32_t						lastBufferFill;
+    bool							bufferEOS;
+    bool							shouldAbort;
+    double							alphaRate;
+    bool							isCheckedForReceiver;
+
+    viper::managers::IMultimediaManagerBase	*multimediaManager;
+    dash::mpd::IRepresentation		*representation;
+};
+}
+}
+}
+
+#endif /* LIBDASH_FRAMEWORK_ADAPTATION_BOLA_H_ */