* WIP: ffmpeg based software decoder
* minor update
* WIP: FFMpeg SW decoder support
* FFMpeg decoder working version
* working version without threading
* multithreading working with FFMpeg decoder
* moved ffmpeg decoder to separate folder
* updated changelog
* minor change
* resolved review comments
* resolved review comments
* fixed a bug in hipMemcpy for copying decoded output to GPU
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Co-authored-by: Lakshmi Kumar <lakshmi.kumar@amd.com>
Co-authored-by: Aryan Salmanpour <aryan.salmanpour@amd.com>
Rajy Rawther
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