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add TestCopySamples_Opt unittest as reference for TestScaleSamples_Opt

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TestScaleSamples_Opt can be slow on ARM if the size of the buffer is 1 MB.
This test does a memcpy and behaves the same.

Bug: libyuv:738
Test: LibYUVPlanarTest.TestCopySamples_Opt
Change-Id: Ia9f30190ed76ea350ebe054c9b899d5268e7e135
Reviewed-on: https://chromium-review.googlesource.com/685751
Reviewed-by: Cheng Wang <wangcheng@google.com>
Commit-Queue: Frank Barchard <fbarchard@google.com>
This commit is contained in:
Frank Barchard 2017-09-26 18:58:29 -07:00 committed by Commit Bot
parent a49fb674e1
commit ccd6d6fc57
1 changed files with 63 additions and 3 deletions
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66
unit_test/planar_test.cc
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@ -2626,9 +2626,9 @@ float TestScaleMaxSamples(int benchmark_width,
float max_c, max_opt = 0.f;
// NEON does multiple of 8, so round count up
const int kPixels = (benchmark_width * benchmark_height + 7) & ~7;
align_buffer_page_end(orig_y, kPixels * 4 * 3);
uint8* dst_c = orig_y + kPixels * 4;
uint8* dst_opt = orig_y + kPixels * 4 * 2;
align_buffer_page_end(orig_y, kPixels * 4 * 3 + 48);
uint8* dst_c = orig_y + kPixels * 4 + 16;
uint8* dst_opt = orig_y + kPixels * 4 * 2 + 32;
// Randomize works but may contain some denormals affecting performance.
// MemRandomize(orig_y, kPixels * 4);
@ -2828,6 +2828,66 @@ TEST_F(LibYUVPlanarTest, TestScaleSamples_Opt) {
EXPECT_EQ(0, diff);
}
float TestCopySamples(int benchmark_width,
int benchmark_height,
int benchmark_iterations,
bool opt) {
int i, j;
// NEON does multiple of 16 floats, so round count up
const int kPixels = (benchmark_width * benchmark_height + 15) & ~15;
align_buffer_page_end(orig_y, kPixels * 4 * 3);
uint8* dst_c = orig_y + kPixels * 4;
uint8* dst_opt = orig_y + kPixels * 4 * 2;
// Randomize works but may contain some denormals affecting performance.
// MemRandomize(orig_y, kPixels * 4);
// large values are problematic. audio is really -1 to 1.
for (i = 0; i < kPixels; ++i) {
(reinterpret_cast<float*>(orig_y))[i] = sinf(static_cast<float>(i) * 0.1f);
}
memset(dst_c, 0, kPixels * 4);
memset(dst_opt, 1, kPixels * 4);
memcpy(reinterpret_cast<void*>(dst_c), reinterpret_cast<void*>(orig_y),
kPixels * 4);
for (j = 0; j < benchmark_iterations; j++) {
if (opt) {
#ifdef HAS_COPYROW_NEON
CopyRow_NEON(orig_y, dst_opt, kPixels * 4);
#else
CopyRow_C(orig_y, dst_opt, kPixels * 4);
#endif
} else {
CopyRow_C(orig_y, dst_opt, kPixels * 4);
}
}
float max_diff = 0.f;
for (i = 0; i < kPixels; ++i) {
float abs_diff = FAbs((reinterpret_cast<float*>(dst_c)[i]) -
(reinterpret_cast<float*>(dst_opt)[i]));
if (abs_diff > max_diff) {
max_diff = abs_diff;
}
}
free_aligned_buffer_page_end(orig_y);
return max_diff;
}
TEST_F(LibYUVPlanarTest, TestCopySamples_C) {
float diff = TestCopySamples(benchmark_width_, benchmark_height_,
benchmark_iterations_, false);
EXPECT_EQ(0, diff);
}
TEST_F(LibYUVPlanarTest, TestCopySamples_Opt) {
float diff = TestCopySamples(benchmark_width_, benchmark_height_,
benchmark_iterations_, true);
EXPECT_EQ(0, diff);
}
extern "C" void GaussRow_NEON(const uint32* src, uint16* dst, int width);
extern "C" void GaussRow_C(const uint32* src, uint16* dst, int width);