dsp优化精华，通过7个rgb转yuv小程序的优化过程，可以初步了解一下dsp程序优化的精髓，包括浮点转换、定点优化、程序级优化、指令集优化、内存优化、DMA优化、数据拼合终极优化-dsp optimize essence, through turn seven rgb yuv small program optimization process can be a preliminary understanding of the essence of the dsp program optimization, including floating-point conversion, fixed-point optimization, program-level optimization, the instruction set to optimize memory optimization, DMA optimization, data Flatten ultimate optimization, etc.