search

lu-zero / libvpx

Local libvpx changes (POWER8 Altivec/VSX support)
BSD 3-Clause "New" or "Revised" License
5 stars 3 forks source link

Implement the quantize #9

Closed lu-zero closed 6 years ago

lu-zero commented 6 years ago

@luctrudeau I had that halfway since ages, if you want to take it over please do :)

luctrudeau commented 6 years ago

Done!

In https://chromium.googlesource.com/webm/libvpx/+/1251bf2a6383e326197a5b70c87d12f5cf4db904 I implemented a VSX version of quantization for 4x4, 8x8 and 16x16 blocks. Considerable speeds ups to quantization have landed in https://chromium.googlesource.com/webm/libvpx/+/81a98509dcd44e939656d8c281e5a5ae5b9926be Finally the 32x32 variant of quantization landed in https://chromium.googlesource.com/webm/libvpx/+/d1aede92ec35f6adceb0c148dedcccc594fce166

VP9QuantizeTest Speed Test (POWER8 Model 2.1) 4x4: C time = 900 ms, VSX time = 141 ms (~7x) 8x8: C time = 818 ms, VSX time = 81 ms (~10x) 16x16: C time = 786 ms, VSX time = 64 ms (~12x) 32x32: C time = 1456 ms, VSX time = 80 ms (~18x)