Upintegreate AAH TX and RX players from ICS_AAH

Upintegrate the android at home TX and RX players developed in the
ICS_AAH branch.

Change-Id: I8247d3702e30d8b0e215b31a92675d8ab28dccbb
Signed-off-by: John Grossman <johngro@google.com>

1 files changed, 162 insertions, 0 deletions

diff --git a/media/libaah_rtp/aah_tx_sender.h b/media/libaah_rtp/aah_tx_sender.h
new file mode 100644
index 0000000..74206c4
--- /dev/null
+++ b/media/libaah_rtp/aah_tx_sender.h
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2011 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 __AAH_TX_SENDER_H__
+#define __AAH_TX_SENDER_H__
+
+#include <media/stagefright/foundation/ALooper.h>
+#include <media/stagefright/foundation/AHandlerReflector.h>
+#include <utils/RefBase.h>
+#include <utils/threads.h>
+
+#include "aah_tx_packet.h"
+#include "pipe_event.h"
+
+namespace android {
+
+template <typename T> class CircularBuffer {
+  public:
+    CircularBuffer(size_t capacity);
+    ~CircularBuffer();
+    void push_back(const T& item);;
+    void pop_front();
+    size_t size() const;
+    bool isFull() const;
+    bool isEmpty() const;
+    const T& itemAt(size_t index) const;
+    const T& operator[](size_t index) const;
+
+  private:
+    T* mBuffer;
+    size_t mCapacity;
+    size_t mHead;
+    size_t mTail;
+    size_t mFillCount;
+
+    DISALLOW_EVIL_CONSTRUCTORS(CircularBuffer);
+};
+
+class AAH_TXSender : public virtual RefBase {
+  public:
+    ~AAH_TXSender();
+
+    static sp<AAH_TXSender> GetInstance();
+
+    ALooper::handler_id handlerID() { return mReflector->id(); }
+
+    // an IP address and port
+    struct Endpoint {
+        Endpoint();
+        Endpoint(uint32_t a, uint16_t p);
+        bool operator<(const Endpoint& other) const;
+
+        uint32_t addr;
+        uint16_t port;
+    };
+
+    uint16_t registerEndpoint(const Endpoint& endpoint);
+    void unregisterEndpoint(const Endpoint& endpoint);
+
+    enum {
+        kWhatSendPacket,
+        kWhatTrimRetryBuffers,
+        kWhatSendHeartbeats,
+    };
+
+    // fields for SendPacket messages
+    static const char* kSendPacketIPAddr;
+    static const char* kSendPacketPort;
+    static const char* kSendPacketTRTPPacket;
+
+  private:
+    AAH_TXSender();
+
+    static Mutex sLock;
+    static wp<AAH_TXSender> sInstance;
+    static uint32_t sNextEpoch;
+    static bool sNextEpochValid;
+
+    static uint32_t getNextEpoch();
+
+    typedef CircularBuffer<sp<TRTPPacket> > RetryBuffer;
+
+    // state maintained on a per-endpoint basis
+    struct EndpointState {
+        EndpointState(uint32_t epoch);
+        RetryBuffer retry;
+        int playerRefCount;
+        uint16_t trtpSeqNumber;
+        uint16_t nextProgramID;
+        uint32_t epoch;
+    };
+
+    friend class AHandlerReflector<AAH_TXSender>;
+    void onMessageReceived(const sp<AMessage>& msg);
+    void onSendPacket(const sp<AMessage>& msg);
+    void doSendPacket_l(const sp<TRTPPacket>& packet,
+                        const Endpoint& endpoint);
+    void trimRetryBuffers();
+    void sendHeartbeats();
+    bool shouldSendHeartbeats_l();
+
+    sp<ALooper> mLooper;
+    sp<AHandlerReflector<AAH_TXSender> > mReflector;
+
+    int mSocket;
+    nsecs_t mLastSentPacketTime;
+
+    DefaultKeyedVector<Endpoint, EndpointState*> mEndpointMap;
+    Mutex mEndpointLock;
+
+    static const int kRetryTrimIntervalUs;
+    static const int kHeartbeatIntervalUs;
+    static const int kRetryBufferCapacity;
+    static const nsecs_t kHeartbeatTimeout;
+
+    class RetryReceiver : public Thread {
+      private:
+        friend class AAH_TXSender;
+
+        RetryReceiver(AAH_TXSender* sender);
+        virtual ~RetryReceiver();
+        virtual bool threadLoop();
+        void handleRetryRequest();
+
+        static const int kMaxReceiverPacketLen;
+        static const uint32_t kRetryRequestID;
+        static const uint32_t kFastStartRequestID;
+        static const uint32_t kRetryNakID;
+
+        AAH_TXSender* mSender;
+        PipeEvent mWakeupEvent;
+    };
+
+    sp<RetryReceiver> mRetryReceiver;
+
+    DISALLOW_EVIL_CONSTRUCTORS(AAH_TXSender);
+};
+
+struct RetryPacket {
+    uint32_t id;
+    uint32_t endpointIP;
+    uint16_t endpointPort;
+    uint16_t seqStart;
+    uint16_t seqEnd;
+} __attribute__((packed));
+
+}  // namespace android
+
+#endif  // __AAH_TX_SENDER_H__