Add a benchmark for calculate_scaling_weights().

diff --git a/resample_effect_test.cpp b/resample_effect_test.cpp
index 7955c5ba99f480a94f048385f1697ffa0fb09091..b47bd577d3740452a28715131834d26570b052de 100644 (file)
--- a/resample_effect_test.cpp
+++ b/resample_effect_test.cpp
@@ -9,6 +9,7 @@
 #include "effect_chain.h"
 #include "flat_input.h"
 #include "image_format.h"
 #include "effect_chain.h"
 #include "flat_input.h"
 #include "image_format.h"

+#include "init.h"

 #include "resample_effect.h"
 #include "test_util.h"
 
 #include "resample_effect.h"
 #include "test_util.h"
 


@@ -471,6 +472,24 @@ BENCHMARK_CAPTURE(BM_ResampleEffectFloat, Float32Upscale, GAMMA_LINEAR, "fragmen
 BENCHMARK_CAPTURE(BM_ResampleEffectInt8, Int8Downscale, GAMMA_REC_709, "fragment")->Args({1280, 720, 640, 360})->Args({1280, 720, 320, 180})->Args({1280, 720, 321, 181})->UseRealTime()->Unit(benchmark::kMicrosecond);
 BENCHMARK_CAPTURE(BM_ResampleEffectFloat, Float32Downscale, GAMMA_LINEAR, "fragment")->Args({1280, 720, 640, 360})->Args({1280, 720, 320, 180})->Args({1280, 720, 321, 181})->UseRealTime()->Unit(benchmark::kMicrosecond);
 
 BENCHMARK_CAPTURE(BM_ResampleEffectInt8, Int8Downscale, GAMMA_REC_709, "fragment")->Args({1280, 720, 640, 360})->Args({1280, 720, 320, 180})->Args({1280, 720, 321, 181})->UseRealTime()->Unit(benchmark::kMicrosecond);
 BENCHMARK_CAPTURE(BM_ResampleEffectFloat, Float32Downscale, GAMMA_LINEAR, "fragment")->Args({1280, 720, 640, 360})->Args({1280, 720, 320, 180})->Args({1280, 720, 321, 181})->UseRealTime()->Unit(benchmark::kMicrosecond);
 

+void BM_ComputeScalingWeights(benchmark::State &state)
+{
+       constexpr unsigned src_size = 1280;
+       constexpr unsigned dst_size = 35;
+       int old_precision = movit_texel_subpixel_precision;
+       movit_texel_subpixel_precision = 64;  // To get consistent results across GPUs; this is a CPU test.
+
+       // One iteration warmup to make sure the Lanczos table is computed.
+       calculate_scaling_weights(src_size, dst_size, 0.999f, 0.0f);
+
+       for (auto _ : state) {
+               ScalingWeights weights = calculate_scaling_weights(src_size, dst_size, 0.999f, 0.0f);
+       }
+
+       movit_texel_subpixel_precision = old_precision;
+}
+BENCHMARK(BM_ComputeScalingWeights)->Unit(benchmark::kMicrosecond);
+

 #endif
 
 }  // namespace movit
 #endif
 
 }  // namespace movit