Hardware encoding and Latency minimization via FFMPEG

[ShootingKing-AM]

Hardware Encoding Support and Network hand-wave latency reduction

• [x] Research low-latency Protocols: Done: RTP best for this application.
• [x] Research Available libraries
  • [x] PJ-SIP, FFMPEG
  • [x] PJ-SIP - Tests: Status: Failed no pj-media Support.
  • [ ] Implement FFMPEG
    • [ ] Implement FFMPEG on Desktop
      • [x] Protocols Selection: RTP (ultra-low latency) + NVENC/NVDEC Encoder (h.264 Container format)
      • [ ] Code Implementation:
        • [x] Implement ffmpeg as ffmpeg-cli commandLineInterface integration
          • [x] Stage0 - Research D3DSharedResourceHandle Streaming
            • [x] Test1: using Inprocess pipes to get pipe render to ffmpeg for encoding. Status: Failed - WritePipe() Speed too low (~15 fps)
            • [x] Test2: Piping D3DSharedResourceHandle to ffmpeg.exe process in background. Status Failed - Hard to maintain with FFMPEG-master updates, better to implement libav*
              • [x] ~Bypass Mobile negotiation, for Development~
              • [x] ~Modify FFMPEG fopen_inputs() to get D3DSharedResourceHandle~
        • [ ] Implement ffmpeg as libav* libraries, if Test1 & 2 Both fail.
          • [ ] Stage1 - Static Content Streaming
            • [ ] Stream Static testfile.mp4, with RTP to localhost, for Dev
              • [x] Bypass Mobile negotiation, for Development
              • [x] Code FFMPEG Init()
              • [x] Code FFMPEG fopen_inputs()
              • [x] Code FFMPEG fopen_outputs()
              • [x] Code FFMPEG transcode()
                • [x] Code FFMPEG transcode_init()
                • [x] Code FFMPEG transcode_step() <--- Main Loop
              • [ ] Code FFMPEG stop_stream(), Outputs and Inputs
              • [x] Code FFMPEG deInit() <--- safe exit + Memory Release
          • [ ] Stage2 - Dynamic Content Streaming
            • [ ] Modify FFMPEG fopen_inputs() to get D3DSharedResourceHandle
              • [x] Research methodology
              • [x] Modify FFMPEG fopen_inputs() to take D3DSharedResourceHandle as Input instead of Static file
    • [ ] Implement FFMPEG on Mobile End
      • [ ] Add shared libraries (.so) to Android project.
      • [ ] Research into available FFMPEGAndroid ports/wrappers
        • [ ] Test3: Port Wrapper Implementation test on Android
      • [ ] If Test3 not successful, implement FFMPEG libav* code.

Fixes #44 and #52