nvjpeg hardware acc #5240
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nvjpeg hardware acc #5240
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liujuncheng
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在A100上使用硬件加速
在不支持硬件加速的时候使用默认gpu解码
在非jpeg图片时fallback到cpu解码
在leinao V100正确性测试结果，fp16：
epoch 49, iter 125, top_1: 0.758240, top_k: 0.927700, samples/s: 1823.343 1624946428.028463