https://morex.ccwu.cc//blog Some days you bloom, some days grow roots, both matter. zh-cn lmxtrl@gmail.com (Roy Tan) lmxtrl@gmail.com (Roy Tan) Sun, 06 Mar 2022 00:00:00 GMT https://morex.ccwu.cc//blog/bit-hacks/compute-abs https://morex.ccwu.cc//blog/bit-hacks/compute-abs The blog explores a bit manipulation technique for computing absolute values of integers, presenting a C++ function mabs. It compares performance with std::abs, demonstrating efficiency on various systems. Sun, 06 Mar 2022 00:00:00 GMT lmxtrl@gmail.com (Roy Tan) cppbitshacks https://morex.ccwu.cc//blog/bit-hacks/compute-power2 https://morex.ccwu.cc//blog/bit-hacks/compute-power2 Explore two efficient bitwise techniques in C/C++ to check if a number is a power of two: ensuring (number & (number - 1)) == 0, and checking that number & -number equals the number itself, both applied to non-zero numbers for optimized performance. Sat, 26 Mar 2022 00:00:00 GMT lmxtrl@gmail.com (Roy Tan) cppbitshacks https://morex.ccwu.cc//blog/bit-hacks/count-bits https://morex.ccwu.cc//blog/bit-hacks/count-bits This post explores a swift technique to count '1's in binary numbers via a merging counter, contrasting with the slower traditional bit-clearing method. It includes code for various integer sizes and demonstrates the method's speed with benchmarks. Sun, 27 Mar 2022 00:00:00 GMT lmxtrl@gmail.com (Roy Tan) cppbitshacks https://morex.ccwu.cc//blog/other/cpp-calls-ffmpeg-for-rtmp-push https://morex.ccwu.cc//blog/other/cpp-calls-ffmpeg-for-rtmp-push 通过管道调用 ffmpeg 推 rtmp 流 Mon, 27 Sep 2021 00:00:00 GMT lmxtrl@gmail.com (Roy Tan) cppffmpegopencvrtmp