RTMPSession.h

/*
 
 Video Core
 Copyright (c) 2014 James G. Hurley
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 
 */
#ifndef __videocore__RTMSession__
#define __videocore__RTMSession__

#include <iostream>
#include <videocore/stream/IStreamSession.hpp>
#include <videocore/stream/TCPThroughputAdaptation.h>

#include <UriParser/UriParser.hpp>

#include <functional>
#include <deque>
#include <queue>
#include <map>
#include <chrono>

#include <videocore/system/JobQueue.hpp>
#include <cstdlib>

#include <videocore/rtmp/RTMPTypes.h>
#include <videocore/system/Buffer.hpp>
#include <videocore/system/PreBuffer.hpp>
#include <videocore/transforms/IOutputSession.hpp>

namespace videocore
{
    class RTMPSession;
    
    using BufStruct = struct { std::shared_ptr<Buffer> buf; std::chrono::steady_clock::time_point time; };
    
    
    enum {
        kRTMPSessionParameterWidth=0,
        kRTMPSessionParameterHeight,
        kRTMPSessionParameterFrameDuration,
        kRTMPSessionParameterVideoBitrate,
        kRTMPSessionParameterAudioFrequency,
        kRTMPSessionParameterStereo,
        kRTMPSessionParameterAudioBitrate
    };
    typedef MetaData<'rtmp', int32_t, int32_t, double, int32_t, double, bool, double> RTMPSessionParameters_t;
    enum {
        kRTMPMetadataTimestamp=0,
        kRTMPMetadataMsgLength,
        kRTMPMetadataMsgTypeId,
        kRTMPMetadataMsgStreamId,
        kRTMPMetadataIsKeyframe
    };
    
    typedef MetaData<'rtmp', int32_t, int32_t, uint8_t, int32_t, bool> RTMPMetadata_t;
    
    using RTMPSessionStateCallback = std::function<void(RTMPSession& session, ClientState_t state)>;
    
    class RTMPSession : public IOutputSession
    {
    public:
        RTMPSession(std::string uri, int maxSendBufferSize, RTMPSessionStateCallback callback);
        ~RTMPSession();
        
        void connectServer();
    public:
        
        // Requires RTMPMetadata_t
        void pushBuffer(const uint8_t* const data, size_t size, IMetadata& metadata);
        
        void setSessionParameters(IMetadata& parameters);
        void setBandwidthCallback(BandwidthCallback callback);
        void setMaxSendBufferSize(size_t size) { m_maxSendBufferSize = size; printf("MAX SEND BUFFER %lu\n", size); };
        void disconnectServer();
    private:
        
        // Deprecate sendPacket
        void sendPacket(uint8_t* data, size_t size, RTMPChunk_0 metadata);
        
        
        
        void streamStatusChanged(StreamStatus_T status);
        void write(uint8_t* data, size_t size, std::chrono::steady_clock::time_point packetTime = std::chrono::steady_clock::now(), bool isKeyframe = false, int msgType = 0);
        void dataReceived();
        void setClientState(ClientState_t state);
        void handshake();
        void handshake0();
        void handshake1();
        void handshake2();
        void sendReleaseStream();
        void sendConnectPacket();
        void sendFCPublish();
        void sendCreateStream();
        void sendPublish();
        void sendHeaderPacket();
        void sendSetChunkSize(int32_t chunkSize);
        void sendPong();
        void sendDeleteStream();
        void sendSetBufferTime(int milliseconds);
        
        void increaseBuffer(int64_t size);
        int  reassembleBuffer(uint8_t *p, int msgSize, int packageSize);
        int  tryReadOneMessage(uint8_t *msg, int msgsize, int from_offset);

        bool parseCurrentData();
        void handleInvoke(uint8_t* p);
        bool handleMessage(uint8_t* p, uint8_t msgTypeId);
        
        std::string parseStatusCode(uint8_t *p);
        int32_t amfPrimitiveObjectSize(uint8_t* p);
        int32_t trackCommand(const std::string& cmd);
    private:
        JobQueue            m_networkQueue;
        JobQueue            m_jobQueue;
        std::chrono::steady_clock::time_point m_sentKeyframe;
        
#ifdef __APPLE__
        dispatch_semaphore_t    m_networkWaitSemaphore;
#else
        std::condition_variable m_networkCond;
        std::mutex              m_networkMutex;
#endif
        
        RingBuffer          m_streamOutRemainder;
        Buffer              m_s1, m_c1;
        
        TCPThroughputAdaptation m_throughputSession;
        
        uint64_t            m_previousTs;
        RTMPChunk_0         m_previousChunk;
        
        std::deque<BufStruct> m_streamOutQueue;
        
        std::map<int, uint64_t>             m_previousChunkData;
//        std::unique_ptr<RingBuffer>         m_streamInBuffer;
        std::unique_ptr<PreallocBuffer>     m_streamInBuffer;
        std::unique_ptr<IStreamSession>     m_streamSession;
        std::vector<uint8_t> m_outBuffer;
        http::url                       m_uri;
        
        RTMPSessionStateCallback        m_callback;
        BandwidthCallback               m_bandwidthCallback;
        
        std::string                     m_playPath;
        std::string                     m_app;
        std::map<int32_t, std::string>  m_trackedCommands;
        
        size_t          m_outChunkSize;
        size_t          m_inChunkSize;
        size_t          m_maxSendBufferSize;
        int64_t         m_bufferSize;
        int64_t         m_dropped;
        
        int32_t         m_streamId;
//        int32_t         m_createStreamInvoke;
        int32_t         m_numberOfInvokes;
        int32_t         m_frameWidth;
        int32_t         m_frameHeight;
        int32_t         m_bitrate;
        double          m_frameDuration;
        double          m_audioRate;
        double          m_audioSampleRate;
        bool            m_audioStereo;
        
        ClientState_t  m_state;
      
        bool            m_clearing;
        bool            m_ending;
    };
}

#endif /* defined(__videocore__RTMSession__) */