Add a benchmark for calculate_scaling_weights().

[movit] / resample_effect_test.cpp

diff --git a/resample_effect_test.cpp b/resample_effect_test.cpp
index 9678aa015cadfff872f0a17950f8c1f537e7c36b..b47bd577d3740452a28715131834d26570b052de 100644 (file)
--- a/resample_effect_test.cpp
+++ b/resample_effect_test.cpp
@@ -4,12 +4,17 @@
 #include <gtest/gtest.h>
 #include <math.h>
 
+#include <memory>
+
 #include "effect_chain.h"
 #include "flat_input.h"
 #include "image_format.h"
+#include "init.h"
 #include "resample_effect.h"
 #include "test_util.h"
 
+using namespace std;
+
 namespace movit {
 
 namespace {
@@ -425,4 +430,66 @@ TEST(ResampleEffectTest, Precision) {
        expect_equal(expected_data, out_data, size, 1);
 }
 
+#ifdef HAVE_BENCHMARK
+template<class T>
+void BM_ResampleEffect(benchmark::State &state, GammaCurve gamma_curve, GLenum output_format, const std::string &shader_type)
+{
+       DisableComputeShadersTemporarily disabler(shader_type == "fragment");
+       if (disabler.should_skip(&state)) return;
+
+       unsigned in_width = state.range(0), in_height = state.range(1);
+       unsigned out_width = state.range(2), out_height = state.range(3);
+
+       unique_ptr<T[]> data(new T[in_width * in_height * 4]);
+       unique_ptr<T[]> out_data(new T[out_width * out_height * 4]);
+
+       for (unsigned i = 0; i < in_width * in_height * 4; ++i) {
+               data[i] = rand();
+       }
+
+       EffectChainTester tester(nullptr, out_width, out_height, FORMAT_BGRA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, gamma_curve, output_format);
+       tester.add_input(data.get(), FORMAT_BGRA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, gamma_curve, in_width, in_height);
+       Effect *resample_effect = tester.get_chain()->add_effect(new ResampleEffect());
+
+       ASSERT_TRUE(resample_effect->set_int("width", out_width));
+       ASSERT_TRUE(resample_effect->set_int("height", out_height));
+
+       tester.benchmark(state, out_data.get(), GL_BGRA, COLORSPACE_sRGB, gamma_curve, OUTPUT_ALPHA_FORMAT_PREMULTIPLIED);
+}
+
+void BM_ResampleEffectFloat(benchmark::State &state, GammaCurve gamma_curve, const std::string &shader_type)
+{
+       BM_ResampleEffect<float>(state, gamma_curve, GL_RGBA16F, shader_type);
+}
+
+void BM_ResampleEffectInt8(benchmark::State &state, GammaCurve gamma_curve, const std::string &shader_type)
+{
+       BM_ResampleEffect<uint8_t>(state, gamma_curve, GL_RGBA8, shader_type);
+}
+
+BENCHMARK_CAPTURE(BM_ResampleEffectInt8, Int8Upscale, GAMMA_REC_709, "fragment")->Args({640, 360, 1280, 720})->Args({320, 180, 1280, 720})->Args({321, 181, 1280, 720})->UseRealTime()->Unit(benchmark::kMicrosecond);
+BENCHMARK_CAPTURE(BM_ResampleEffectFloat, Float32Upscale, GAMMA_LINEAR, "fragment")->Args({640, 360, 1280, 720})->Args({320, 180, 1280, 720})->Args({321, 181, 1280, 720})->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