/* * Copyright 2022 The LibYuv Project Authors. All rights reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree.
*/
#if !defined(DISABLE_SLOW_TESTS) || defined(__x86_64__) || defined(__i386__) // SLOW TESTS are those that are unoptimized C code. // FULL TESTS are optimized but test many variations of the same code. #define ENABLE_FULL_TESTS #endif
// Test scaling with C vs Opt and return maximum pixel difference. 0 = exact. staticint RGBTestFilter(int src_width, int src_height, int dst_width, int dst_height,
FilterMode f, int benchmark_iterations, int disable_cpu_flags, int benchmark_cpu_info) { if (!SizeValid(src_width, src_height, dst_width, dst_height)) { return 0;
}
int i, j; constint b = 0; // 128 to test for padding/stride.
int64_t src_rgb_plane_size =
(Abs(src_width) + b * 3) * (Abs(src_height) + b * 3) * 3LL; int src_stride_rgb = (b * 3 + Abs(src_width)) * 3;
// Warm up both versions for consistent benchmarks.
MaskCpuFlags(disable_cpu_flags); // Disable all CPU optimization.
RGBScale(src_rgb + (src_stride_rgb * b) + b * 3, src_stride_rgb, src_width,
src_height, dst_rgb_c + (dst_stride_rgb * b) + b * 3, dst_stride_rgb,
dst_width, dst_height, f);
MaskCpuFlags(benchmark_cpu_info); // Enable all CPU optimization.
RGBScale(src_rgb + (src_stride_rgb * b) + b * 3, src_stride_rgb, src_width,
src_height, dst_rgb_opt + (dst_stride_rgb * b) + b * 3,
dst_stride_rgb, dst_width, dst_height, f);
MaskCpuFlags(disable_cpu_flags); // Disable all CPU optimization. double c_time = get_time();
RGBScale(src_rgb + (src_stride_rgb * b) + b * 3, src_stride_rgb, src_width,
src_height, dst_rgb_c + (dst_stride_rgb * b) + b * 3, dst_stride_rgb,
dst_width, dst_height, f);
c_time = (get_time() - c_time);
MaskCpuFlags(benchmark_cpu_info); // Enable all CPU optimization. double opt_time = get_time(); for (i = 0; i < benchmark_iterations; ++i) {
RGBScale(src_rgb + (src_stride_rgb * b) + b * 3, src_stride_rgb, src_width,
src_height, dst_rgb_opt + (dst_stride_rgb * b) + b * 3,
dst_stride_rgb, dst_width, dst_height, f);
}
opt_time = (get_time() - opt_time) / benchmark_iterations;
// Report performance of C vs OPT
printf("filter %d - %8d us C - %8d us OPT\n", f, static_cast<int>(c_time * 1e6), static_cast<int>(opt_time * 1e6));
// C version may be a little off from the optimized. Order of // operations may introduce rounding somewhere. So do a difference // of the buffers and look to see that the max difference isn't // over 2. int max_diff = 0; for (i = b; i < (dst_height + b); ++i) { for (j = b * 3; j < (dst_width + b) * 3; ++j) { int abs_diff = Abs(dst_rgb_c[(i * dst_stride_rgb) + j] -
dst_rgb_opt[(i * dst_stride_rgb) + j]); if (abs_diff > max_diff) {
max_diff = abs_diff;
}
}
}
#ifdefined(ENABLE_FULL_TESTS) // Test a scale factor with all 4 filters. Expect unfiltered to be exact, but // filtering is different fixed point implementations for SSSE3, Neon and C. #define TEST_FACTOR(name, nom, denom) \
TEST_FACTOR1(name, None, nom, denom, 0) \
TEST_FACTOR1(name, Linear, nom, denom, 3) \
TEST_FACTOR1(name, Bilinear, nom, denom, 3) \
TEST_FACTOR1(name, Box, nom, denom, 3) #else // Test a scale factor with Bilinear. #define TEST_FACTOR(name, nom, denom) \
TEST_FACTOR1(name, Bilinear, nom, denom, 3) #endif
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.