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Does libyuv have a YUV420ToRGB565 function optimized for NEON?
From what I see in libyuv sources there’s a function I420ToRGB565 but it first converts to ARGB and only then to RGB565 and that last conversion is not NEON-optimized. Am I mistaken?
You’re correct, for the current r396 version.
I420ToRGB565 uses NEON for I420ToARGB but C for ARGBToRGB565.
Neon + C
I420ToRGB565_OptVsC (12649 ms)
Thats 12.6 ms/frame for 1280×720. Its faster compared to just C:
I420ToRGB565_OptVsC (81485 ms)
RGB24 is 1 step NEON for comparison.
I420ToRGB24_OptVsC (3392 ms)
A bug is files to port to Neon
http://code.google.com/p/libyuv/issues/detail?id=103